                           RECOMMENDED FOR FULL-TEXT PUBLICATION
                               Pursuant to Sixth Circuit I.O.P. 32.1(b)
                                      File Name: 16a0199p.06

                    UNITED STATES COURT OF APPEALS
                                   FOR THE SIXTH CIRCUIT
                                     _________________


 UNITED STATES OF AMERICA,                               ┐
                                   Plaintiff-Appellee,   │
                                                         │
                                                         │
        v.                                                >      No. 15-1279
                                                         │
                                                         │
 DETROIT MEDICAL CENTER,                                 │
                                Defendant-Appellant.     │
                                                         ┘
                          Appeal from the United States District Court
                         for the Eastern District of Michigan at Detroit.
                     No. 2:05-cv-71722—Arthur J. Tarnow, District Judge.

                                     Argued: June 15, 2016

                              Decided and Filed: August 17, 2016

                BEFORE: BATCHELDER, GIBBONS, and SUTTON, Circuit Judges.
                              _________________

                                          COUNSEL

ARGUED: Thomas D. Sykes, GOULD & RATNER LLP, Chicago, Illinois, for Appellant.
Deborah K. Snyder, UNITED STATES DEPARTMENT OF JUSTICE, Washington, D.C., for
Appellee. ON BRIEF: Thomas D. Sykes, GOULD & RATNER LLP, Chicago, Illinois, for
Appellant. Deborah K. Snyder, Gilbert S. Rothenberg, Richard Farber, UNITED STATES
DEPARTMENT OF JUSTICE, Washington, D.C., for Appellee.
                                      _________________

                                           OPINION
                                      _________________

       SUTTON, Circuit Judge. Detroit Medical Center is made up of a collection of not-for-
profit hospitals incorporated under Michigan law. The Center overpaid its taxes, entitling it to a
refund plus interest. Under the Internal Revenue Code, “corporations” receive lower interest




                                                1
No. 15-1279                     United States v. Detroit Med. Ctr.                   Page 2


rates on such refunds (the federal short-term interest rate plus as little as 0.5%) than other
taxpayers (the federal short-term interest rate plus 3%). 26 U.S.C. § 6621(a)(1). The Center
claims that, as a not-for-profit corporation, it should not be treated as a corporation and thus
should be eligible for the higher interest rate—increasing its refund by $9.1 million. The Internal
Revenue Service disagreed.       And so did the district court.      Because a nonprofit entity
incorporated under state law amounts to a corporation, see Trs. of Dartmouth Coll. v. Woodward,
17 U.S. (4 Wheat.) 518, 636 (1819), and because the Code contains no indication to the contrary,
we must affirm the district court.

                                                I.

       The parties have been here before.       In the first round, the Detroit Medical Center
disclaimed any duty to pay FICA taxes (short for Federal Insurance Contributions Act taxes,
which fund Social Security and Medicare benefits) on the stipends paid to its medical residents.
We remanded the case to the district court to determine whether the residents amounted to
“students” under the Center’s residency program, making them eligible for the student
exemption from the FICA tax obligation. United States v. Detroit Med. Ctr., 557 F.3d 412 (6th
Cir. 2009). In 2010, before the district court had a chance to resolve the issue, the IRS issued an
administrative ruling that medical residents were students, exempting them (and their employers)
from FICA taxes for tax periods prior to April 1, 2005. In the aftermath of this ruling, the Center
and the IRS settled the dispute. Or so it seemed.

       The IRS agreed to issue refunds to the Center for 1995–1997, 2001–2004, and the first
quarter of 2005. For each of those twenty-nine taxable quarters, the IRS sent two checks to the
Center: one for the employer portion of the FICA tax, the other for the employee portion of the
FICA tax. The checks consisted of tax refunds and interest set by § 6621(a)(1). The IRS paid
interest on the employee (the resident) portion of the FICA refunds at the rate for non-
corporations: the federal short-term interest rate plus 3%. The IRS paid interest on the employer
(the Medical Center) portion of the FICA refunds at the rate set for corporations: the federal
short-term interest rate plus 2% for the first $10,000, then the short-term rate plus 0.5% on the
portion of each refund above $10,000.
No. 15-1279                    United States v. Detroit Med. Ctr.                     Page 3


        After it received the refund checks, the Center filed a motion to reinstate the case,
seeking $9.1 million in additional interest on the employer portion refunds. Even though it was
incorporated under Michigan law, it maintained that it should not be regarded as a “corporation”
under § 6621(a)(1). The district court granted the United States’ motion for summary judgment,
concluding that the lower corporate interest rate on overpayment in § 6621(a)(1)(B) applied to
tax refunds owed to for-profit and not-for-profit corporations. The Center appeals.

                                                II.

        In construing legislation, courts begin with the language of the statute. That approach,
quite rightly, confirms the centrality of text to statutory interpretation. But it also explains why
some statutory-interpretation opinions have difficulty holding the interest (and the
comprehension) of the reader. To respect the first imperative sometimes creates tension with the
second.

        Consider our task today.     The question at hand sounds simple enough:           Should a
nonprofit corporation be treated like a for-profit corporation when it comes to the interest it
receives on overpaid taxes? Now consider the question in the context of the Internal Revenue
Code:

        (a) General rule
               (1) Overpayment rate
               The overpayment rate established under this section shall be the sum of—
               (A) the Federal short-term rate determined under subsection (b), plus
               (B) 3 percentage points (2 percentage points in the case of a corporation).

               To the extent that an overpayment of tax by a corporation for any taxable
               period (as defined in subsection (c)(3), applied by substituting
               “overpayment” for “underpayment”) exceeds $10,000, subparagraph (B)
               shall be applied by substituting “0.5 percentage point” for “2 percentage
               points.”
               (2) Underpayment rate
               The underpayment rate established under this section shall be the sum
               of—
               (A) the Federal short-term rate determined under subsection (b), plus
               (B) 3 percentage points.
No. 15-1279                    United States v. Detroit Med. Ctr.                    Page 4


                                               ...
       (c) Increase in underpayment rate for large corporate underpayments

               (1) In general
               For purposes of determining the amount of interest payable under section
               6601 on any large corporate underpayment for periods after the applicable
               date, paragraph (2) of subsection (a) shall be applied by substituting
               “5 percentage points” for “3 percentage points”.
                                               ...
               (3) Large corporate underpayment
               For purposes of this subsection—
                      (A) In general
                      The term “large corporate underpayment” means any
                      underpayment of a tax by a C corporation for any taxable period if
                      the amount of such underpayment for such period exceeds
                      $100,000.
                      (B) Taxable period
                      For purposes of subparagraph (A), the term “taxable period”
                      means—
                             (i) in the case of any tax imposed by subtitle A, the taxable
                             year, or
                             (ii) in the case of any other tax, the period to which the
                             underpayment relates.

26 U.S.C. § 6621.

       What starts as a basic question gets less basic the more one reads. Yes, this is a tax case.
Some complexities—different rules for overpayments and underpayments, different interest rates
for different taxpayers, some exceptions to some rules—come with the territory. But the first
sign that the author of this provision was not thinking of his readers appears in the parenthetical
of the flush paragraph: “To the extent that an overpayment of tax by a corporation for any
taxable period (as defined in subsection (c)(3), applied by substituting ‘overpayment’ for
‘underpayment’) exceeds $10,000, subparagraph (B) shall be applied by substituting
‘0.5 percentage point’ for ‘2 percentage points.’” The meaning of this exception turns on a cross
reference to another subsection that applies to the opposite form of payment mentioned in the
first subsection but only for “C corporation[s],” not “corporations” in general.        26 U.S.C.
§ 6621(c)(3)(A).
No. 15-1279                    United States v. Detroit Med. Ctr.                   Page 5


       At the risk of creating undue suspense, we’ll start by ignoring the exception. In other
words, we’ll consider how the tax overpayment rules in general apply to Detroit Medical Center,
and after that we’ll consider whether the exception alters that conclusion.

       Here, to repeat, is the general rule from § 6621:

    (a) General rule
       (1) Overpayment rate
       The overpayment rate established under this section shall be the sum of—
             (A) the Federal short-term rate determined under subsection (b), plus
             (B) 3 percentage points (2 percentage points in the case of a corporation).

       The statute creates a dichotomy between overpayments by “a corporation” and by all
other taxpayers, with corporations receiving a lower interest rate on their overpayments than
everyone else. Incorporated under Michigan law, the Detroit Medical Center is by every relevant
measure a corporation, meaning it receives the lower interest rate.

       The first way of measuring this conclusion is not as helpful as one might hope. Since
1918, the Code has included a definition of “corporation.” 26 U.S.C. § 7701(a)(3). But that
definition offers a false peak. It says only that the term “includes associations, joint-stock
companies, and insurance companies.” The Center of course is not an association, joint-stock
company, or insurance company. But because the word “includes” is a term of inclusion, not
exclusion, that does not prevent the Center from being a corporation under the Code in general or
under § 6621 in particular. See 26 U.S.C. § 7701(c).

       In the absence of any statutory definition to the contrary, courts assume that Congress
adopts the customary meaning of the terms it uses. Morissette v. United States, 342 U.S. 246,
263 (1952).     For centuries, courts have permitted charitable organizations to be treated as
corporations.    See Edmund Seymour, The Historical Development of the Common Law
Conception of the Corporation, 51 Am. L. Reg. 529 (1903). So firm is the foundation on which
this principle rests that Chief Justice Marshall’s invocation of it in Dartmouth College—
permitting a college to be treated as a corporation—might have been called cliché in 1819. Two
centuries earlier, in 1612, Sir Edward Coke wrote that a charitable hospital and school founded at
the London Charterhouse was as valid a corporation as any other because it possessed all the
No. 15-1279                     United States v. Detroit Med. Ctr.                       Page 6


characteristics that are of the essence of a corporation. The Case of Sutton’s Hospital, 77 Eng.
Rep. 937 (1612), in 1 Selected Writings of Sir Edward Coke, vol. 1, 347, 363, 377 (Steve
Sheppard ed., Liberty Fund 2003).         In 1753, William Blackstone described charitable or
“eleemosynary” corporations as one of the three basic kinds of corporations (the others he called
“ecclesiastical” and “civil”) and explained that “[e]leemosynary corporations are chiefly
hospitals, or colleges in the universities.” 1 William Blackstone, Commentaries *482.

       By 1819, no one could be surprised that Chief Justice Marshall’s definition of
“corporation” would cover nonprofit institutions such as Dartmouth College: “an artificial
being, invisible, intangible, and existing only in contemplation of law. Being the mere creature
of law, it possesses only those properties which the charter of its creation confers upon it, either
expressly, or as incidental to its very existence.” Dartmouth College, 17 U.S. at 636. By 1833,
Justice Joseph Story was piling on when he wrote that charitable corporations may take the
corporate form to the same degree as for-profit, commercial corporations:

       It is wholly immaterial, in such cases, whether the corporation take for their own
       private benefit, or for the benefit of other persons. . . . A charter to a bank, or
       insurance, or turnpike company, is certainly a contract, founded in a valuable
       consideration. But it is not more so, than a charter incorporating persons for the
       erection and support of a hospital for the aged, the sick, or the infirm, which is to
       be supported by private contributions, or is founded upon private charity.

3 Joseph Story, Commentaries on the Constitution § 1386 (1833). Because the common law
understanding of “corporation” has consistently included nonprofit corporations like Detroit
Medical Center, it is fair to infer that the Internal Revenue Code uses the term in that same sense
in § 6621.

       New and old dictionary definitions of corporation come to the same place.                  One
dictionary after another defines “corporation” in a way that includes nonprofit entities. The
Oxford English Dictionary is one: “A body corporate legally authorized to act as a single
individual; an artificial person created by royal charter, prescription, or act of the legislature, and
having authority to preserve certain rights in perpetual succession.” Oxford English Dictionary
(2d ed. online version 2016). Webster’s Second International is another: “A body politic or
corporate formed and authorized by law to act as a single person, and endowed by law with the
No. 15-1279                     United States v. Detroit Med. Ctr.                    Page 7


capacity of succession. . . . The definition most commonly accepted by judicial decision in the
United States is that of the Dartmouth College Case. . . .            Lay corporations may be:
eleemosynary corporations, those created for charitable purposes; and civil corporations, those
formed for temporal purposes, and comprising public or municipal, corporations.” Webster’s
New International Dictionary 596 (2d ed. 1934). And Black’s Law Dictionary is still another,
whether one looks to an older definition: “An artificial person or legal entity created by or under
the authority of the laws of a state or a nation . . . ordinarily consisting of an association of
numerous individuals, who subsist as a body politic under a special denomination, which is
regarded in law as having a personality and existence distinct from that of its several members.”
Black’s Law Dictionary (2d ed. 1910). Or to a newer one: “a group or succession of persons
established in accordance with legal rules into a legal or juristic person that has a legal
personality distinct from the natural persons who make it up, exists indefinitely apart from them,
and has the legal powers that its constitution gives it.” Black’s Law Dictionary 415 (10th ed.
2014).

         Proof that Congress used the generic definition of “corporation” in § 6621—applicable to
for-profit and not-for-profit entities alike—appears throughout the Internal Revenue Code.
Consider three basic types of corporations addressed in the Code:           nonprofit corporations
covered by subchapter F; certain for-profit corporations covered by subchapter C; and certain
for-profit corporations covered by subchapter S. In all three places, the drafters of the Code
called these distinct entities “corporations.” Even everyday shorthand references to the three
entities do not remove the term, as lawyers (and judges) customarily refer to them as § 501(c)(3)
corporations, S corporations, and C corporations.

         Section 501 is illustrative. It addresses nonprofit entities that are generally exempt from
federal income tax and that the Code still refers to as “corporations,” assuming that, like the
Detroit Medical Center, they are chartered in that way. The title of 26 U.S.C. § 501 refers to an
“[e]xemption from tax on corporations, certain trusts, etc.” The word “corporation” is used
approximately fifty times throughout § 501. More than a dozen different categories of nonprofit
“corporations” are listed as exempt under § 501(c), including the first three “exempt
organizations”: § 501(c)(1) (“Any corporation organized under Act of Congress”); § 501(c)(2)
No. 15-1279                     United States v. Detroit Med. Ctr.                      Page 8


(“Corporations organized for the exclusive purpose of holding title to property”); and § 501(c)(3)
(“Corporations, and any community chest, fund, or foundation, organized and operated
exclusively for religious, charitable, scientific, testing for public safety, literary, or educational
purposes”). The drafters of the Code had no problem using the word “corporation” to refer to
§ 501(c)(3) entities like the Medical Center, among many other nonprofit corporations, making it
fair to infer they meant to give the same word the same meaning in § 6621.

       So too in other parts of the Code. Section 1381(a)(2)(A) says that the rules governing the
tax treatment of cooperatives apply to “any corporation operating on a cooperative basis other
than an organization . . . which is exempt from tax under this chapter.” In the absence of that
carve-out for tax-exempt corporations, such entities would have been included within the
meaning of “corporation.” Section 2522(b)(2) creates a tax deduction for gifts to “a domestic
corporation organized and operated exclusively for religious, charitable, scientific, literary, or
educational purposes.” The word “corporation,” as this section shows, often covers nonprofits.
In § 1(h)(11)(B)(ii)(I), which addresses income tax, there is a carve-out for dividends taxed as
net capital gain: “any dividend from a corporation which for the taxable year of the corporation
in which the distribution is made, or the preceding taxable year, is a corporation exempt from tax
under section 501 or 521.” The section treats these nonprofit corporations as corporations, then
specifically excludes them from coverage.        Many other similar examples exist.        See, e.g.,
26 U.S.C. § 12(1); 26 U.S.C. § 3121(h)(5); 26 U.S.C. § 2522(b)(2); 26 U.S.C. § 1504(b)(1).

       O’Neil v. United States, 410 F.2d 888 (6th Cir. 1969), bolsters this conclusion. We held
that “a corporation created under state law is a corporation within the meaning of” the Code. Id.
at 899. Any doubt about our conviction on this score was removed when we referred elsewhere
to state law incorporations as the “definitional lodestar” of a corporation under the Code. Id. at
895. The Detroit Medical Center, as it acknowledges, is a state law corporation. Yes, the precise
question at hand in O’Neil was whether a for-profit business incorporated under state law
amounted to a corporation. But it’s not just the above statements that preclude us from limiting
the decision to for-profit entities; the court’s reasoning turns on the generic definition. In saying
that “all organizations bearing the label ‘corporation’ under state law” are “accorded that status
for federal income tax purposes,” the Court relied on Chief Justice Marshall’s iconic definition
No. 15-1279                     United States v. Detroit Med. Ctr.                     Page 9


of corporation in Dartmouth College. Id. at 895. What was true for the nonprofit College is true
for the nonprofit Medical Center. They are both corporations.

       All of this puts the Detroit Medical Center at the bottom of a steep hill when it comes to
showing that the term “corporation” in § 6621 of the Code refers only to for-profit corporations.
Its key argument turns on the flush paragraph mentioned above and reprinted here:

       To the extent that an overpayment of tax by a corporation for any taxable period
       (as defined in subsection (c)(3), applied by substituting “overpayment” for
       “underpayment”) exceeds $10,000, subparagraph (B) shall be applied by
       substituting “0.5 percentage point” for “2 percentage points.”

       As the Center sees it, the definitional parenthetical takes the reader to subsection (c)(3),
and that subsection applies to tax payments by a “C corporation.” Hence, concludes the Center,
if a corporation makes a tax overpayment, the lower interest rate applies to the refund only if the
entity is a C corporation—a type of for-profit corporation. In the Center’s words, “the type of
‘corporation’ specified by (a)(1) is the type of corporation embedded in and specified by (c)(3):
a ‘C corporation.’” Appellant’s Br. 14.

       We disagree with this interpretation, innovative though it is. The key problem is that the
parenthetical most naturally modifies “taxable period,” not “corporation.” The “as defined”
phrase appears closest to “taxable period,” suggesting that this is what it is defining. Of all the
terms that precede the parenthetical, moreover, “taxable period” is the only one “defined” in
subsection (c)(3). There is no definition of corporation in subsection (c)(3). Also undermining
this proposal is the reality that the definition of “taxable period” in (c)(3) refers to the word
“underpayment”—the term for which “overpayment” must be substituted under the exception.
Subsection (c)(3)(B)(ii) then defines taxable period as, “in the case of any other tax, the period to
which the underpayment relates.” The parenthetical explains that, to get a definition of “taxable
period” for the purposes of (a)(1)(B), the reader looks to its definition in (c)(3), “applied by
substituting ‘overpayment’ for ‘underpayment.’” That the definition of “taxable period” in (c)(3)
includes the word “underpayment” shows that Congress sought to define “taxable period” by the
cross-reference to (c)(3) in the flush language.
No. 15-1279                    United States v. Detroit Med. Ctr.                   Page 10


       The definition of “taxable period” appears in subsection (c)(3)(B), it is true, and the
parenthetical cross-reference refers to subsection “(c)(3).” But this kind of imprecision is not
unheard of in the Internal Revenue Code. Look no further than this section. Section 6621(c)(1)
says: “For purposes of determining the amount of interest payable under section 6601 on any
large corporate underpayment for periods after the applicable date, paragraph (2) of subsection
(a) shall be applied by substituting ‘5 percentage points’ for ‘3 percentage points,’” (emphasis
added). If we should expect Congress to mention the most precise subsection in each cross-
reference, it should have mentioned § 6621(a)(2)(B), which mentions “3 percentage points,” not
all of § 6621(a)(2), which does several additional things. See also, e.g., 26 U.S.C. § 42(k)(2)(A)
(referring to “a qualified nonprofit organization (as defined in subsection (h)(5)),” even though
subsection (h)(5)(c) defines “qualified nonprofit organization”).

       If the parenthetical phrase defines all of the preceding phrase, taking in “overpayment of
tax by a corporation” and “taxable period” by way of (c)(3), another problem arises. Presumably
the definition in (c)(3) that would cover “overpayment of tax by a corporation” is “large
corporate underpayment,” the only other term defined in (c)(3).         The definition of “large
corporate underpayment” in (c)(3), however, is a two-part definition, applicable to an
underpayment made by a C corporation for more than $100,000. If “overpayment of a tax by a
corporation” means the same thing as “large corporate underpayment” in (c)(3) (substituting
overpayment for underpayment) then the overpayment would have to be (1) made by a
C corporation, and (2) for more than $100,000. But Congress in § 6621(a) chose to say that a
corporate overpayment would be in excess of $10,000. In other words: If the (c)(3) definition of
“large corporate underpayment” returns to (a)(1), that means the statute says: “To the extent that
an overpayment of tax by a C corporation over $100,000 for any taxable period exceeds
$10,000 . . . .” Because $100,000 always exceeds $10,000, that would make the dependent
clause of the flush language in (a)(1) a needlessly confusing appendage. Congress deserves
more credit than that.

       Nor is the Medical Center correct that the default meaning of “corporation” is
C corporation throughout the Internal Revenue Code. Appellant’s Br. 31. For one, the general
definition of corporation covers nonprofit corporations, going back to Dartmouth College and
No. 15-1279                    United States v. Detroit Med. Ctr.                   Page 11


beyond. For another, that approach does not work. If Congress generally intends unadorned
references to “corporations” to be read as meaning “C corporations,” the first reference to
“corporation” in § 6621(a)(1)(B) would naturally be read to refer to a “C corporation.” But
Congress later referred to “C corporations” in (c)(3), rendering the “C” superfluous, something
we try to avoid. What, moreover, would happen to S corporations and their overpayments and
underpayments? The Center offers no answer. The better inference is this: “Where Congress
includes particular language in one section of a statute”—for example C corporation—“but omits
it in another section of the same Act”—for example corporation—“it is generally presumed that
Congress acts intentionally and purposely in the disparate inclusion or exclusion.” Russello v.
United States, 464 U.S. 16, 23 (1983).

       The Medical Center persists that the Internal Revenue Code’s definition of
“S corporation” shows that the word corporation by itself generally refers to a C corporation. In
a section entitled “S Corporation defined,” the Code says two things: (1) that an S corporation
means “a small business corporation” that has made an S corporation election under § 1362(a)
for that year; and (2) a C corporation means “a corporation which is not an S corporation” for
that year. 26 U.S.C. § 1361(a). This definition, says the Center, proves that all corporations are
C corporations unless they are S corporations. But this argument is the epitome of a false
dichotomy.    It may be that, in the world of for-profit corporations, an entity is either an
S corporation or a C corporation.        But that does not mean that everything that is not an
S corporation—such as a § 501(c)(3) corporation—is a C corporation.

       Nor does the like-manner canon, formally known as the in pari materia canon, help
Detroit Medical Center. In English, the canon says that words dealing with the same matter in
the same statute should be given the same meaning. Mertens v. Hewitt Assocs., 508 U.S. 248,
260 (1993). The Center inverts the canon in invoking it here. It asks us to treat the same matters
throughout the Internal Revenue Code differently and different matters within one section the
same. It implores us to treat the use of the word “corporation” in § 6621(a)(1) differently from
uses of the same word in other sections of the Internal Revenue Code, such as § 501(c)(3). And
it implores us to treat the use of the generic word “corporation” in § 6621(a)(1) the same as the
specific term “C corporation” in § 6621(c)(3).       The canon in truth leads to the opposite
No. 15-1279                    United States v. Detroit Med. Ctr.                    Page 12


conclusion: that the word “corporation,” standing alone, and the word “corporation,” preceded
by the qualifier “C,” should be given different meanings.

       In claiming that the parenthetical cross-reference provides definitions for both
“corporation” and “taxable period,” the Center is half right. Subsection (c)(3) defines two
phrases:   “large corporate underpayment” and “taxable period.”          But it does not define
“corporation.” And one would not expect to find the definition of “corporation” in the definition
of “large corporate underpayment,” as the definition of a genus usually does not appear in the
definition of the species.

       No doubt, it is strange that Congress reduced the interest rate on overpayments for all
corporations, whether for profit or not. We have considerable sympathy for the Medical Center
on this score. Congress has created a regime in which a nonprofit hospital receives a lower
interest rate on its FICA tax overpayments than Warren Buffett does on his individual tax
returns. Perhaps Congress did not think about the point. Nonprofit corporations after all do not
pay income tax, and most tax overpayment issues usually arise in the context of income taxes, as
opposed to the automatic withdrawal regime associated with FICA taxes.            And perhaps if
Congress thinks about the point, it will alter the rule. But for now, we have a statute that by any
conventional method of interpretation does not provide relief for the Detroit Medical Center.
“Our unwillingness to soften the import of Congress’ chosen words even if we believe the words
lead to a harsh outcome is longstanding.” Lamie v. United States Tr., 540 U.S. 526, 538 (2004).

       The Medical Center overreaches in purporting to identify another oddity. Under the
government’s position, it says, “only one type of entity enjoys the standard rate of interest on
underpayments (subsection (c)) while simultaneously receiving a lower, non-standard (reduced)
rate of interest on its overpayments (subsection (a)(1)): a charitable organization that happens to
have been organized as a not-for-profit corporation.” Appellant’s Br. 39–40 (emphasis omitted).
But the factual predicate of this claim is not true. An S corporation is in the same position. It
would receive the standard rate (3%) for underpayments and the non-standard lower rate (2%
and 0.5%) for overpayments as a “corporation.” And a C corporation would be in the same
position as well if its underpayment was less than $100,000. Some of the asymmetries in the
provision by the way benefit nonprofit corporations. If a nonprofit corporation underpays its
No. 15-1279                     United States v. Detroit Med. Ctr.                      Page 13


taxes by more than $100,000, it would not be subject to the same higher interest rate of 5% as a
C corporation. It would just have to pay the standard 3%.

       We take some comfort in the reality that the Second Circuit, in a thoughtful opinion by
Judge Lynch, faced this same issue and reached the same conclusion. Maimonides Med. Ctr. v.
United States, 809 F.3d 85 (2d Cir. 2015). In doing so, it made many points that by now ought
to be familiar:   The word “corporation” “ordinarily refers to both for-profit and nonprofit
entities,” id. at 87; the key feature of the background definition is not whether the entity is a for-
profit operation but whether state law has conferred corporate status on the entity, id. at 88; other
uses of “corporation” throughout the Code include incorporated nonprofit organizations, id. at
88–89; and “corporation” does not mean “C corporation” in § 6621(a)(1) because the cross-
reference in that section defines “taxable period,” not “corporation,” id. at 91. Agreed.

       For these reasons, we affirm.
