Which common medical expenses are explicitly disallowed by IRS Publication 502 and why?
Executive summary
IRS Publication 502 defines which out-of-pocket medical and dental costs can be itemized and deducted, and it also names several common expenses taxpayers cannot deduct — chiefly those that are cosmetic or for general health and any costs already compensated by insurance or other sources [1] [2]. This analysis identifies the most common explicitly disallowed categories, explains the IRS rationale, and highlights narrow exceptions that Publication 502 itself records.
1. What Publication 502 covers and the baseline rule
Publication 502 explains that only the portion of medical and dental expenses that exceeds 7.5% of adjusted gross income may be deducted on Schedule A, and that not every possible health-related outlay qualifies as a deductible medical expense [1]. The publication repeatedly frames the deduction as applicable to costs of “diagnosis, cure, mitigation, treatment, or prevention of disease,” and it pairs that substantive test with a simple administrative limitation: expenses already reimbursed by insurance or another payer are not deductible [2].
2. Explicitly disallowed common expenses — cosmetic and elective procedures
Publication 502 and authoritative summaries make clear that elective or cosmetic surgery and similar procedures intended to enhance appearance — for example, purely cosmetic surgery or teeth‑whitening services — are not deductible because they are not treatments for disease or impairment [3] [4]. The rule is concrete: cosmetic procedures become deductible only when they are necessary to correct a deformity from a congenital abnormality, injury, or disfiguring disease — otherwise they are treated as personal, nondeductible expenses [4].
3. Explicitly disallowed common expenses — general health, fitness and wellness costs
The IRS distinguishes treatment for a medical condition from expenditures for general health or well‑being: routine health‑club dues, nutritional supplements, and similar wellness spending are disallowed unless a physician prescribes them to treat a specific diagnosed medical condition [4]. Publication 502’s guidance thus rejects broad, preventive, or lifestyle‑oriented expenses when they lack a documented therapeutic purpose.
4. Explicitly disallowed because they’re compensated or reimbursed
A fundamental administrative bar in Publication 502 is that any expense “compensated by insurance or otherwise” is not deductible, irrespective of who received the reimbursement or how payment was made to the provider [2]. That rule eliminates duplicate benefit claims and is repeated in Topic No. 502: if insurance pays the bill or someone else covers it, the taxpayer cannot claim that cost again as an unreimbursed medical expense [2].
5. Why these categories are excluded — the IRS policy logic
The disallowances flow from two linked principles stated or illustrated in Publication 502: deductible medical expenses must be for diagnosing, curing, mitigating, treating, or preventing disease (a substantive medical test), and they must be unreimbursed (an administrative fairness test) [1] [2]. Cosmetics and general‑health costs fail the substantive test because they are personal or aesthetic rather than therapeutic; reimbursed costs fail the administrative test because the deduction is intended only for out‑of‑pocket burdens [2] [4].
6. Edge cases, exceptions and practical caveats
Publication 502 explicitly preserves narrow exceptions that complicate bright‑line rules: cosmetic surgery is deductible when required to correct a deformity from congenital defects, injury, or disease, and fitness or supplement costs may become deductible when a physician prescribes them to treat a specific condition [4]. The publication also signals other complex areas and updates (for example, treatment for substance abuse and COVID‑era clarifications), so taxpayers must consult the full text for nuanced cases because summaries do not capture every exception or procedural requirement [1] [5].
7. Limits of this reporting and practical takeaway
The available IRS materials and authoritative summaries identify the major disallowed categories — cosmetic/elective procedures, general‑health and fitness costs without medical prescription, and any expenses already compensated — and explain the agency’s reasons [2] [3] [4]. If questions persist about borderline items, Publication 502 itself and IRS topic guidance remain the controlling sources; this review relies solely on those materials and on reputable explanatory summaries and therefore does not attempt to adjudicate ambiguous, unlisted expenses beyond what the IRS text provides [1] [6].