ICD-10 Code C90.00 – Multiple myeloma not having achieved remission (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C90.00 – Multiple myeloma not having achieved remission
What it is
This code identifies multiple myeloma that is still active and has not gone into remission. Use it when the record states the disease persists, relapses without remission, or remains uncontrolled.
Clinical signs
Clinical features vary; refer to documentation. Common findings in multiple myeloma include bone pain, anemia, renal impairment, recurrent infections, and evidence of plasma cell proliferation.
When to use this code
Use C90.00 when the provider documents multiple myeloma without remission, partial remission not documented, or active disease after treatment. It also fits follow-up visits when the cancer is still present and remission has not been achieved.
Code this only when the chart clearly supports ongoing myeloma. If the note does not specify remission status, check documentation before assigning the code.
Do not use for
Do not use this code for multiple myeloma in remission, history of myeloma, or suspected disease without confirmation. Check documentation if the status is unclear.
Coding tip
Always verify remission status in the provider note before coding, because the distinction changes the ICD-10-CM code selection.