
692 S.E.2d 793 (2010)
HILLIS
v.
The STATE.
No. A10A0285.
Court of Appeals of Georgia.
March 26, 2010.
Balbo & Gregg, Attilio J. Balbo, Richmond Hill, for appellant.
Tom Durden, Dist, Atty., Ronald J. Poirier, Asst. Dist. Atty., for appellee.
MIKELL, Judge.
Donald M. Hillis pled guilty to three counts of child molestation and was given concurrent sentences of twenty years probation on condition that he serve three years in a Department of Corrections (the "Department") detention center.[1] Thereafter, Hillis was assigned to the Southeastern Probation Center ("Southeastern") in Claxton where the Department conducted a medical evaluation and allegedly determined that his medical issues could be more appropriately addressed by his transfer to Ware State Prison.[2] Following the transfer, Hillis filed *794 a motion to modify his sentence, contending that his reassignment unlawfully increased the severity of his sentence and asking that he be returned to Southeastern or that he be given alternative probation options, such as home confinement. The trial court denied the motion, and Hillis appeals. We affirm.
In two related enumerations, Hillis contends that the trial court erred in denying his motion to modify sentence because his reassignment from Southeastern to Ware State Prison constituted an increase in his sentence. In support of this contention, Hillis points out that the appellate courts of this state have consistently held that "incarceration" and "probation" are mutually exclusive concepts and that converting a defendant's sentence from probation time to prison time constitutes an unlawful increase in his/her sentence.[3] While Hillis correctly cites Blake, Pitts, and Edge in support of this proposition, those cases are inapplicable to this case.
OCGA § 42-8-35.4 authorizes the trial court to sentence a defendant such as Hillis to a program of confinement in a probation detention center and expressly permits the Department to exercise its discretion and transfer a probationer "to other facilities in order to provide needed physical and mental health care or for other reasons essential to the care and supervision of [that] probationer or as necessary for the effective administration and management of its facilities."[4] The Code section does not require the Department to transfer a probationer to a probation detention center nor does it prohibit the Department from transferring a probationer to a prison. Had the legislature intended to limit the Department's transfer authority to other probation detention centers it could have done so. Instead, it used the broader term facilities.[5] Moreover, Hillis expressly agreed  as a special condition of probation  that the Department may transfer him to other facilities if necessary. The decision to transfer a probationer to another facility is made by the Department and does not involve the trial court.
We also reject Hillis's contention that Edge[6] is "similarly postured" to this case. Edge concerns the trial court's authority to resentence a probationer to prison time after that probationer has begun serving his probated sentence.[7] This case concerns the Department's authority to transfer a probationer to another Department facility after that individual has begun serving his sentence. While the former action is unlawful, the latter is expressly authorized by statute.
Because Hillis's sole complaint goes to the Department's decision to transfer him under OCGA § 42-8-35.4(c), his claim is cognizable only in a mandamus action against the Commissioner of the Department of Corrections or in a petition for habeas corpus.[8] It follows *795 that the trial court did not err in denying Hillis's motion to modify his sentence.
Judgment affirmed.
SMITH, P.J., and ADAMS, J., concur.
NOTES
[1]  In conjunction with his guilty plea, Hillis signed a "Special Conditions of Probation Detention Center" form, which provided that "[d]uring the period of confinement, the [Department] may transfer the Defendant to other facilities in order to provide needed health care or other cause essential to the care and supervision of the Defendant or as necessary for the effective administration and management of its facilities."
[2]  Hillis is 68 years old and suffers from heart problems.
[3]  See Blake v. State, 272 Ga.App. 402, 403-406(1), 612 S.E.2d 589 (2005); Pitts v. State, 206 Ga.App. 635, 638-639(3), 426 S.E.2d 257 (1992) ("[i]n the absence of express statutory authority recognizing continuous and uninterrupted incarceration in a jail or penitentiary as a viable condition of probation and establishing the parameters thereof, . . . imposition of any term of continuous and uninterrupted incarceration in a jail or penitentiary as a special condition of probation . . . is unauthorized by law"); Edge v. State, 194 Ga.App. 466, 467, 391 S.E.2d 18 (1990). Compare OCGA § 42-5-18(a)(2), which defines "place of incarceration" as "any prison, probation detention center, jail, or institution, including any state, federal, local, or privately operated facility, used for the purpose of incarcerating criminals or detainees." (Emphasis supplied.)
[4]  OCGA § 42-8-35.4(a), (c).
[5]  The General Assembly did not specifically define the term "facility" in the probation article; however, it is defined in the employee benefit fund article as "a prison, institution, detention center, diversion center, probation office, or such other similar property under the jurisdiction or operation of the department." OCGA § 42-2-15(a)(4). See Harris v. State, 286 Ga. 245, 247-248(4), 686 S.E.2d 777 (2009), citing Higdon v. City of Senoia, 273 Ga. 83, 86(3), 538 S.E.2d 39 (2000) ("All statutes are presumed to be enacted with full knowledge of existing law and their meaning and effect is to be determined with reference to the constitution as well as other statutes and decisions of the courts") (citation omitted).
[6]  Supra.
[7]  Id.
[8]  See, e.g., Maldonado v. State, 260 Ga.App. 580, 581, 580 S.E.2d 330 (2003) (calculation of credit for time served is computed by the Department of Corrections and does not involve the trial court).
