ICD-10 Code C81.26 – Mixed cellularity Hodgkin lymphoma, intrapelvic lymph nodes (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C81.26 – Mixed cellularity Hodgkin lymphoma, intrapelvic lymph nodes
What it is
C81.26 identifies mixed cellularity Hodgkin lymphoma involving intrapelvic lymph nodes. Use it when the diagnosis specifies this Hodgkin lymphoma subtype and the pelvic nodal site.
Clinical signs
Clinical features vary; refer to documentation. Hodgkin lymphoma is typically confirmed by pathology, and records may note lymph node enlargement, systemic “B” symptoms, or imaging showing pelvic nodal disease.
When to use this code
Use this code when the provider documents mixed cellularity Hodgkin lymphoma in intrapelvic lymph nodes. It also applies when pathology or oncology notes clearly identify this subtype and an intrapelvic nodal primary site. If the site or subtype is not stated, check documentation before coding.
Do not use for
Do not use this code for other Hodgkin lymphoma subtypes, unspecified lymphoma, or non-Hodgkin lymphomas. If the record does not confirm intrapelvic lymph node involvement, check documentation.
Coding tip
Code to the most specific documented subtype and nodal site; if either is missing, query the record rather than guessing.