C88.90 Malignant immunoproliferative disease, unspecified not having achieved remission

The ICD-10-CM code for Malignant immunoproliferative disease, unspecified not having achieved remission is C88.90 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

2: Neoplasms (C00-D49)

Section

C81-C96: Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96)

Category C88

19 codes (12 billable)

FY2026 Status

Introduced in FY2025

Inclusion Terms

• Immunoproliferative disease NOS
• Immunoproliferative disease NOS not having achieved remission
• Immunoproliferative disease NOS with failed remission
• Malignant immunoproliferative disease, unspecified NOS
• Malignant immunoproliferative disease, unspecified with failed remission

Official Coding Guidelines

Tx of primary site (TOC entry)

a. Admission/Encounter for treatment of primary site ............................................................. 33

Tx of secondary site (TOC entry)

b. Admission/Encounter for treatment of secondary site .......................................................... 33

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool