ICD-10 Code C84.47 – Peripheral T-cell lymphoma, not elsewhere classified, spleen (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C84.47 – Peripheral T-cell lymphoma, not elsewhere classified, spleen
What it is
This code identifies peripheral T-cell lymphoma, not otherwise specified, with spleen involvement. Use it when the lymphoma is documented as arising in or involving the spleen and no more specific subtype is stated.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include splenomegaly, abdominal discomfort, constitutional “B” symptoms, and other evidence of lymphomatous involvement.
When to use this code
Use C84.47 when the provider documents peripheral T-cell lymphoma, not elsewhere classified, involving the spleen. It is appropriate when the spleen is the stated site and the record does not identify a more specific T-cell lymphoma category.
If the note only says “T-cell lymphoma” or describes multiple sites, check documentation for the exact histology and primary site before coding. Confirm whether the spleen is the documented involved organ.
Do not use for
Do not use this code for other lymphoma subtypes, such as B-cell lymphomas or Hodgkin lymphoma. If the spleen is not specifically documented as involved, check documentation.
Coding tip
Match the code to the exact pathology wording and site documentation; when the subtype or spleen involvement is unclear, query the provider.