ICD-10-CM C90: Multiple myeloma and malignant plasma cell neoplasms

ICD-10-CM Diagnosis Code (2025)

Official Description for C90

Multiple myeloma and malignant plasma cell neoplasms

Coding Notes & Guidelines for C90

Excludes1: Not Coded Here

personal history of other malignant neoplasms of lymphoid, hematopoietic and related tissues (Z85.79)

Excludes1: Not Coded Here
  • solitary myeloma (C90.3-)
  • solitary plasmactyoma (C90.3-)
Inclusion Terms
  • Kahler's disease
  • Medullary plasmacytoma
  • Myelomatosis
  • Plasma cell myeloma
Inclusion Terms
  • Multiple myeloma with failed remission
  • Multiple myeloma NOS
Inclusion Terms

Plasmacytic leukemia

Inclusion Terms
  • Plasma cell leukemia with failed remission
  • Plasma cell leukemia NOS
Inclusion Terms
  • Extramedullary plasmacytoma with failed remission
  • Extramedullary plasmacytoma NOS
Inclusion Terms
  • Localized malignant plasma cell tumor NOS
  • Plasmacytoma NOS
  • Solitary myeloma
Inclusion Terms
  • Solitary plasmacytoma with failed remission
  • Solitary plasmacytoma NOS

Child Codes (More Specific Codes for C90):

C90.0 - Multiple myeloma C90.00 - Multiple myeloma not having achieved remission C90.01 - Multiple myeloma in remission C90.02 - Multiple myeloma in relapse C90.1 - Plasma cell leukemia C90.10 - Plasma cell leukemia not having achieved remission C90.11 - Plasma cell leukemia in remission C90.12 - Plasma cell leukemia in relapse C90.2 - Extramedullary plasmacytoma C90.20 - Extramedullary plasmacytoma not having achieved remission C90.21 - Extramedullary plasmacytoma in remission C90.22 - Extramedullary plasmacytoma in relapse C90.3 - Solitary plasmacytoma C90.30 - Solitary plasmacytoma not having achieved remission C90.31 - Solitary plasmacytoma in remission C90.32 - Solitary plasmacytoma in relapse

About ICD-10-CM Code C90 (Multiple myeloma and malignant plasma cell neoplasms)

ICD-10-CM code C90 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM C90 became effective on October 1, 2024.

This page provides detailed information about C90 - Multiple myeloma and malignant plasma cell neoplasms. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Multiple myeloma and malignant plasma cell neoplasms.