C90.21
C90.21: Extramedullary plasmacytoma in remission
Billable / specific codeICD-10-CM
C90.21 is a billable, specific ICD-10-CM code for extramedullary plasmacytoma in remission. It is valid for submission on a claim.
Check C90.21 with the rest of the claim: free scrubberOther codes that can never be billed with C90.21
Their own Excludes1 notes name this code, so the conflict is not listed above.
- Z85.79Personal history of other malignant neoplasms of lymphoid, hematopoietic and related tissues
Risk adjustment
C90.21 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 19 Myelodysplastic Syndromes, Multiple Myeloma, and Other Cancers1.798 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. Look up the whole chart to see which of its HCCs the hierarchy would zero.
Medicare coverage
C90.21 is named in 33 Medicare coverage policies: 33 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.
- A52370Billing and Coding: Bevacizumab and biosimilars
- A52399Billing and Coding: Denosumab (Prolia®, Xgeva®, Jubbonti®) and biosimilars
- A52479Oral Anticancer Drugs - Policy Article
- A52480Oral Antiemetic Drugs (Replacement for Intravenous Antiemetics) - Policy Article
Code history
Unchanged in every release from FY2024 to FY2027.