The issue presented in this case is a question of first impression for this Circuit: are medical residents categorically ineligible to assert the “student exemption” from Federal Insurance Contributions Act (“FICA”) taxation found in 26 U.S.C. § 3121(b)(10)? We hold that the services performed by medical residents are not categorically ineligible for the stu *1250 dent exemption from FICA taxation. As a result, we VACATE the summary judgment and REMAND for further proceedings consistent with this opinion.
I. BACKGROUND
On 18 September 2002, Plaintiff/Appel-lee United States of America filed a one-count complaint against Defendant/Appellant Mount Sinai Medical Center of Florida, Inc. (“Mount Sinai”) alleging that the Internal Revenue Service (“IRS”) had issued an erroneous refund to Mount Sinai in the amount of $2,450,177.32. The refund had been for FICA taxes paid and withheld by Mount Sinai for payments made to medical residents participating in Mount Sinai’s Graduate Medical Education Program (“GMEP”) for the tax years 1996 through 1999. The IRS. had refunded these taxes to Mount Sinai in 2000 and 2001 and had included amounts attributable to both the employer and employee portions of FICA taxes.
In response to the government’s complaint, Mount Sinai answered that the taxes were properly refunded pursuant to the student exemption, which exempts from FICA taxation “service[s] performed in the employ of ... a school, college, or university ... if such service is performed by a student who is enrolled and regularly attending classes at such school, college, or university.” 26 U.S.C. § '3121(b)(10). The government moved for summary judgment, contending that, as a matter of law, medical residents are never eligible to claim the student exemption.
The district court found, as a matter of law, that the student exemption to FICA does not include medical residents, and, therefore, the Mount Sinai medical residents’ remunerations were subject to FICA taxation. Accordingly, it granted the government’s motion for summary -inrlfymcm-f- T'Trícs ormool fnllrmrar]
II. STANDARD OF REVIEW
We review an order of summary judgment
de novo. See Morrison Rests., Inc. v. United States,
III. DISCUSSION
The sole issue on appeal is whether the district court erred in ruling that medical residents enrolled in Mount Sinai’s GMEP are ineligible, as a matter of law, to assert the student exemption to FICA taxation found in 26 U.S.C. § 3121(b)(10).
FICA imposes a tax on wages that employers pay their employees for the purpose of funding the Social Security Trust Fund.
See
26 U.S.C. §§ 3101(a)-(b), 3111(a)-(b);
see also McDonald v. S. Farm Bureau Life Ins. Co.,
Congress has amended 26 U.S.C. § 3121 numerous times and there is a substantial amount of legislative history, dating back to 1939. In reviewing the legislative history, the district court found that Congress imposed mandatory FICA taxation on all medical residents when it repealed the statutory exclusion for medical interns under the “intern exemption,” formerly found in § 3121(b)(13).
See United States v. Mount Sinai Med. Ctr. of Fla., Inc.,
On appeal, Mount Sinai asserts that we should not consider legislative history because the student exemption is unambiguous. Alternatively, Mount Sinai posits that even if the student exemption is ambiguous, the district court failed to consider the complete legislative history in deriving congressional intent. Specifically, Mount Sinai contends that although the intern exemption was eliminated, medical residents were permitted to assert other exemptions and that reversing the district court would not render the original intern exemption superfluous. Moreover, Mount Sinai argues that the district court’s ruling was contrary to the government’s regulations and guidance. Consequently, Mount Sinai seeks a reversal of the district court’s ruling and a remand for a factual inquiry into whether Mount Sinai’s residents qualify for the student exemption. In response, the government argues that the student exemption cannot, as a matter of law, apply to medical residents. Its arguments are largely based on the legislative history, structure, and intent of the student exemption, the intern exemption, and related provisions of the Internal Revenue Code.
We agree with Mount Sinai that the district court improperly relied on legislative history without first determining whether the language of the statute was ambiguous.
See Consumer Prod. Safety Comm’n v. GTE Sylvania, Inc.,
*1252
By its plain terms, the student exemption does not limit the types of services that qualify for the exemption. Whether a medical resident is a “student” and whether he is employed by a “school, college, or university” are separate factual inquiries that depend on the nature of the residency program in which the medical residents participate and the status of the employer. Though tax exemptions “must be unambiguously proved,”
United States v. Wells Fargo Bank,
The government’s attempt to look past the plain language of the statute in reliance on the legislative history violates a basic principle of statutory interpretation. “[W]hen the statute’s language is plain, the sole function of the courts—at least where the disposition required by the text is not absurd—is to enforce it according to its terms.”
Hartford Underwriters Ins. Co. v. Union Planters Bank,
If Congress had wanted to make medical residents ineligible for the student exemption, it could have easily crafted a specific exclusion, as it did in 26 U.S.C. § 3121(b)(6)(B), which excludes medical and dental interns and residents employed by the United States from consideration of the federal employment FICA exemption,
3
and § 3121(d)(3), which imposes mandatory FICA taxation on commission drivers, full-time life insurance salesmen, home workers, and traveling salesmen.
See CBS Inc. v. PrimeTime 24 Joint Venture,
The government devotes a substantial portion of its brief to analyzing the student exemption’s relation to the now-repealed intern exemption. The government notes that Congress repealed the FICA exemp *1253 tion for medical interns in 1965. It contends that repeal of the intern exemption evidences Congress’s intent to bring all young doctors-in-training within the scope of Social Security coverage, and, hence, FICA taxation. The government asserts it would be highly incongruous for Congress to have repealed the intern exemption for those pursuing a one-year course of post-M.D. training, and yet continue to exempt the services of medical residents and fellows, who are pursuing several years of training after receiving their M.D. degrees.
The government’s arguments with respect to the FICA scheme and the history of the separate intern exemption are unavailing. First, the government’s reliance on
St
Luke’s,
We reject the government’s assertion that courts should defer to a “bright-line” rule that medical residents can never be exempted from FICA taxation as students.
See Apfel,
IV. CONCLUSION
We hold that the district court erred in ruling that medical residents enrolled in graduate medical education programs are precluded, as a matter of law, from seeking to rely on the student exemption to FICA taxation in 26 U.S.C. § 3121(b)(10). Accordingly, we VACATE the summary judgment and REMAND for further proceedings consistent with this opinion.
Notes
. The intern exemption provided an exemption for "service performed as an intern[ ] in the employ of a hospital .... ” § 3121(b)(13) (repealed 1965).
. In fact, as interpreted by the United States Department of Treasury, Section 3121 (b)(l 0) contemplates a case-by-case approach to determining whether particular services qualified for the student exemption.
See 26
C.F.R. § 31.312 l(b)(10)—2;
see also Univ. of Chicago Hosps. v. United States,
No. 05-C5120,
.
See United States v. Univ. Hosp., Inc., No.
1:05-CV-445,
