CPT 55866: ICD-10 codes that support medical necessity
These ICD-10-CM diagnoses support medical necessity for CPT 55866 under Medicare coverage policies (LCDs, NCDs, and Billing & Coding articles). Billing CPT 55866 with a diagnosis that isn't covered typically denies as CARC 50 — not medically necessary.
National approximation. Coverage varies by MAC and state — confirm against the specific LCD/NCD and article that applies to your jurisdiction and date of service.
| ICD-10 | Description |
|---|---|
| F64.1 | Dual role transvestism |
| F64.2 | Gender identity disorder of childhood |
| F64.8 | Other gender identity disorders |
| F64.9 | Gender identity disorder, unspecified |
| Z87.8901 | Personal history of social gender transition |
| Z87.8902 | Personal history of medical gender transition |
| Z87.8903 | Personal history of surgical gender transition |
| Z87.8904 | Personal history of intersex surgery |
| Z87.8909 | Personal history of unspecified gender transition |
Frequently asked questions
Which ICD-10 codes support medical necessity for CPT 55866?
Medicare coverage policies (LCDs/NCDs and Billing & Coding articles) list 9 ICD-10 diagnosis codes that support medical necessity for CPT 55866. The covered codes are listed on this page. Coverage varies by MAC/state — always confirm against the policy that applies to you.
What is a medical-necessity (LCD/NCD) crosswalk?
A claim whose procedure isn't supported by a covered diagnosis denies as "not medically necessary" (CARC 50). CMS coverage policies define which diagnoses justify a procedure; this page is the ICD-10 → CPT 55866 view of that relationship.
More free billing tools: all crosswalks · NCCI edits · Medicare fees · denial codes
Informational only, not coding, billing, or legal advice. Based on CMS Medicare Coverage Database data; verify the current LCD/NCD for your MAC before billing.
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