C90.3 — Solitary plasmacytoma
C90.3 is a non-billable header ICD-10-CM code for solitary plasmacytoma. It cannot be billed on its own: choose one of the more specific child codes below.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Localized malignant plasma cell tumor NOS
- Plasmacytoma NOS
- Solitary myeloma
Other codes that can never be billed with C90.3
These codes carry an Excludes1 note pointing at C90.3. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading C90.3 alone.
- C90.0Multiple myeloma
Risk adjustment
C90.3 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
How C90.3 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 C90.3.
- Myeloma›monostotic
Code to one of these instead C90.3
3 child codes. Green means billable.
Related codes at this level
Codes that share C90. If C90.3 is not quite right, the correct code is usually one of these.
Questions about C90.3
- Is C90.3 a billable ICD-10-CM code?
- No. C90.3 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does C90.3 sit in the tabular list?
- Neoplasms (C00-D49), in the block Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96).