C90.11

HCC Category Mapping

What This Code Means

Plasma cell leukemia that is currently in remission.

Coding Tips

• •Verify remission status is explicitly documented before coding fifth character '1'
• •Plasma cell leukemia in remission is relatively uncommon; ensure diagnosis and remission status are well-documented

Clinical Significance

Plasma cell leukemia in remission is a rare clinical achievement given the extremely aggressive nature of this disease. Remission may require intensive chemotherapy followed by stem cell transplantation. Given the high relapse rate, close surveillance with frequent monitoring of peripheral blood, serum protein studies, and bone marrow assessment is critical for early detection of recurrence.

Documentation Requirements

• ✓Remission must be explicitly documented by the oncologist with supporting evidence including absence of circulating plasma cells on peripheral blood, normalization of protein studies, and bone marrow biopsy showing minimal residual disease.
• ✓Treatment history, transplant status, surveillance schedule, and monitoring parameters must be recorded.

Commonly Confused Codes