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C90.20

C90.20Extramedullary plasmacytoma not having achieved remission

Billable / specific codeICD-10-CM

C90.20 is a billable, specific ICD-10-CM code for extramedullary plasmacytoma not having achieved remission. It is valid for submission on a claim.

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Extramedullary plasmacytoma with failed remission
  • Extramedullary plasmacytoma NOS

Risk adjustment

C90.20 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.

Medicare coverage

C90.20 is named in 38 Medicare coverage policies 38 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

  • A52399Billing and Coding: Denosumab (Prolia®, Xgeva®, Jubbonti®, Wyost®, Ospomyv™,Xbryk™,Bomyntra®, Conexxence®, Stoboclo®, Osenvelt®,Bildyos®, Bilprevda®)
  • A52479Oral Anticancer Drugs - Policy Article
  • A52479Oral Anticancer Drugs - Policy Article
  • A52479Oral Anticancer Drugs - Policy Article

Related codes at this level

Codes that share C90.2. If C90.20 is not quite right, the correct code is usually one of these.

Questions about C90.20

Is C90.20 a billable ICD-10-CM code?
Yes. C90.20 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does C90.20 sit in the tabular list?
Neoplasms (C00-D49), in the block Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96).
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.