ICD-10 Code C85.1A – Unspecified B-cell lymphoma, in remission (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C85.1A – Unspecified B-cell lymphoma, in remission
What it is
This code identifies a history of unspecified B-cell lymphoma that is currently in remission. Use it when the lymphoma remains the active diagnosis for follow-up, but there is no evidence of current disease.
Clinical signs
Clinical features vary; refer to documentation. Typical records note prior B-cell lymphoma with remission status confirmed by the treating clinician, and no current signs of active lymphoma.
When to use this code
Use this code when the provider documents unspecified B-cell lymphoma and clearly states it is in remission. It is appropriate for follow-up visits, surveillance, or ongoing cancer history management when the lymphoma is not active. Check documentation if the record does not specify remission.
Do not use for
Do not use this code for active B-cell lymphoma, relapse, or progression. If the subtype is known and documented, code the more specific lymphoma diagnosis instead.
Coding tip
Verify that “in remission” is explicitly documented by the provider before assigning C85.1A.