ICD-10 Code C88.90 – Malignant Immunoproliferative Disease, Unspecified Not Having Achieved Remission (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C88.90 – Malignant immunoproliferative disease, unspecified not having achieved remission
What it is
C88.90 identifies a malignant immunoproliferative disorder that is not otherwise specified and has not reached remission. Use it when the record confirms this diagnosis but does not name a more specific subtype.
Clinical signs
Clinical features vary; refer to documentation. Records may describe an established malignant immunoproliferative process with persistent disease activity or incomplete response, but you should not infer details that are not stated.
When to use this code
Use this code when the provider documents malignant immunoproliferative disease, unspecified, and also states the condition is not having achieved remission. It fits encounters for ongoing evaluation, monitoring, or management of active disease. If the subtype is identified elsewhere in the chart, code the more specific diagnosis instead.
Do not use for
Do not use it for malignant immunoproliferative disease in remission, or when a more specific immunoproliferative disorder is documented. Check documentation if the record only mentions a suspected diagnosis or an unrelated lymphoid malignancy.
Coding tip
Match both elements exactly: unspecified malignant immunoproliferative disease and not having achieved remission.