ICD-10 Code C81.23 – Mixed Cellularity Hodgkin Lymphoma, Intra-Abdominal Lymph Nodes (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C81.23 – Mixed cellularity Hodgkin lymphoma, intra-abdominal lymph nodes
What it is
C81.23 identifies mixed cellularity Hodgkin lymphoma involving intra-abdominal lymph nodes. Use it when the diagnosis specifically names this Hodgkin lymphoma subtype and the nodal site is within the abdomen.
Clinical signs
Clinical features vary; refer to documentation. Hodgkin lymphoma commonly presents with enlarged lymph nodes, constitutional symptoms, or imaging findings, and the record should support the mixed cellularity subtype and intra-abdominal location.
When to use this code
Use this code when the provider documents mixed cellularity Hodgkin lymphoma affecting intra-abdominal lymph nodes. It is appropriate for confirmed primary diagnosis, follow-up documentation, or active disease being evaluated in the abdomen. Check documentation if the site is described more generally.
Do not use for
Do not use it for unspecified Hodgkin lymphoma, other histologic subtypes, or lymph node involvement outside the abdomen. If the record does not clearly identify mixed cellularity and intra-abdominal nodes, code more specifically only when supported.
Coding tip
Match both the lymphoma subtype and nodal location exactly as documented before assigning C81.23.