C40.90 — Malignant neoplasm of unspecified bones and articular cartilage of unspecified limb
C40.90 is a billable, specific ICD-10-CM code for malignant neoplasm of unspecified bones and articular cartilage of unspecified limb. It is valid for submission on a claim.
Risk adjustment
C40.90 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
C40.90 is named in 35 Medicare coverage policies — 35 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52479Oral Anticancer Drugs - Policy Article
- A52479Oral Anticancer Drugs - Policy Article
- A52479Oral Anticancer Drugs - Policy Article
- A52479Oral Anticancer Drugs - Policy Article
How C40.90 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to C40.90.
- Adamantinoma›long bones
Related codes at this level
Codes that share C40.9. If C40.90 is not quite right, the correct code is usually one of these.
Questions about C40.90
- Is C40.90 a billable ICD-10-CM code?
- Yes. C40.90 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does C40.90 sit in the tabular list?
- Neoplasms (C00-D49), in the block Malignant neoplasms of bone and articular cartilage (C40-C41).