C40.22 — Malignant neoplasm of long bones of left lower limb
C40.22 is a billable, specific ICD-10-CM code for malignant neoplasm of long bones of left lower limb. It is valid for submission on a claim.
Other codes that can never be billed with C40.22
These codes carry an Excludes1 note pointing at C40.22. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading C40.22 alone.
- C41Malignant neoplasm of bone and articular cartilage of other and unspecified sites
Risk adjustment
C40.22 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 21 Lymphoma and Other Cancers0.671 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.
Medicare coverage
C40.22 is named in 81 Medicare coverage policies — 81 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
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Code history
C40.22 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Related codes at this level
Codes that share C40.2. If C40.22 is not quite right, the correct code is usually one of these.
Questions about C40.22
- Is C40.22 a billable ICD-10-CM code?
- Yes. C40.22 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does C40.22 sit in the tabular list?
- Neoplasms (C00-D49), in the block Malignant neoplasms of bone and articular cartilage (C40-C41).