CPT 77437: ICD-10 codes that support medical necessity
These ICD-10-CM diagnoses support medical necessity for CPT 77437 under Medicare coverage policies (LCDs, NCDs, and Billing & Coding articles). Billing CPT 77437 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 |
|---|---|
| C44.01 | Basal cell carcinoma of skin of lip |
| C44.02 | Squamous cell carcinoma of skin of lip |
| C44.1121 | Basal cell carcinoma of skin of right upper eyelid, including canthus |
| C44.1122 | Basal cell carcinoma of skin of right lower eyelid, including canthus |
| C44.1191 | Basal cell carcinoma of skin of left upper eyelid, including canthus |
| C44.1192 | Basal cell carcinoma of skin of left lower eyelid, including canthus |
| C44.1221 | Squamous cell carcinoma of skin of right upper eyelid, including canthus |
| C44.1222 | Squamous cell carcinoma of skin of right lower eyelid, including canthus |
| C44.1291 | Squamous cell carcinoma of skin of left upper eyelid, including canthus |
| C44.1292 | Squamous cell carcinoma of skin of left lower eyelid, including canthus |
| C44.212 | Basal cell carcinoma of skin of right ear and external auricular canal |
| C44.219 | Basal cell carcinoma of skin of left ear and external auricular canal |
| C44.222 | Squamous cell carcinoma of skin of right ear and external auricular canal |
| C44.229 | Squamous cell carcinoma of skin of left ear and external auricular canal |
| C44.311 | Basal cell carcinoma of skin of nose |
| C44.319 | Basal cell carcinoma of skin of other parts of face |
| C44.321 | Squamous cell carcinoma of skin of nose |
| C44.329 | Squamous cell carcinoma of skin of other parts of face |
| C44.41 | Basal cell carcinoma of skin of scalp and neck |
| C44.42 | Squamous cell carcinoma of skin of scalp and neck |
| C44.510 | Basal cell carcinoma of anal skin |
| C44.511 | Basal cell carcinoma of skin of breast |
| C44.519 | Basal cell carcinoma of skin of other part of trunk |
| C44.520 | Squamous cell carcinoma of anal skin |
| C44.521 | Squamous cell carcinoma of skin of breast |
| C44.529 | Squamous cell carcinoma of skin of other part of trunk |
| C44.612 | Basal cell carcinoma of skin of right upper limb, including shoulder |
| C44.619 | Basal cell carcinoma of skin of left upper limb, including shoulder |
| C44.622 | Squamous cell carcinoma of skin of right upper limb, including shoulder |
| C44.629 | Squamous cell carcinoma of skin of left upper limb, including shoulder |
| C44.712 | Basal cell carcinoma of skin of right lower limb, including hip |
| C44.719 | Basal cell carcinoma of skin of left lower limb, including hip |
| C44.722 | Squamous cell carcinoma of skin of right lower limb, including hip |
| C44.729 | Squamous cell carcinoma of skin of left lower limb, including hip |
| D04.0 | Carcinoma in situ of skin of lip |
| D04.111 | Carcinoma in situ of skin of right upper eyelid, including canthus |
| D04.112 | Carcinoma in situ of skin of right lower eyelid, including canthus |
| D04.121 | Carcinoma in situ of skin of left upper eyelid, including canthus |
| D04.122 | Carcinoma in situ of skin of left lower eyelid, including canthus |
| D04.21 | Carcinoma in situ of skin of right ear and external auricular canal |
| D04.22 | Carcinoma in situ of skin of left ear and external auricular canal |
| D04.39 | Carcinoma in situ of skin of other parts of face |
| D04.4 | Carcinoma in situ of skin of scalp and neck |
| D04.5 | Carcinoma in situ of skin of trunk |
| D04.61 | Carcinoma in situ of skin of right upper limb, including shoulder |
| D04.62 | Carcinoma in situ of skin of left upper limb, including shoulder |
| D04.71 | Carcinoma in situ of skin of right lower limb, including hip |
| D04.72 | Carcinoma in situ of skin of left lower limb, including hip |
| D04.8 | Carcinoma in situ of skin of other sites |
| D07.1 | Carcinoma in situ of vulva |
| D07.4 | Carcinoma in situ of penis |
Frequently asked questions
Which ICD-10 codes support medical necessity for CPT 77437?
Medicare coverage policies (LCDs/NCDs and Billing & Coding articles) list 51 ICD-10 diagnosis codes that support medical necessity for CPT 77437. 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 77437 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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