C83.3 vs C85
C83.3 and C85 can never be reported together. ICD-10-CM declares them mutually exclusive with an Excludes1 note, meaning the two conditions cannot occur in the same patient — so exactly one of them is correct for any given encounter.
The official note, declared on C83.3
mediastinal (thymic) large B-cell lymphoma (C85.2-)
C83.3
Diffuse large B-cell lymphoma
Not billable
- Chapter 2
- Neoplasms
- Section
- C81-C96
Use when the record says
- Anaplastic diffuse large B-cell lymphoma
- CD30-positive diffuse large B-cell lymphoma
- Centroblastic diffuse large B-cell lymphoma
- Diffuse large B-cell lymphoma, subtype not specified
- Immunoblastic diffuse large B-cell lymphoma
- Plasmablastic diffuse large B-cell lymphoma
- T-cell rich diffuse large B-cell lymphoma
Indexed under
- Lymphoma › diffuse large cell (of) (malignant)
- Lymphoma › diffuse large cell › anaplastic (of) (malignant)
- Lymphoma › diffuse large cell › B-cell (of) (malignant)
- Lymphoma › diffuse large cell › CD30-positive (of) (malignant)
- Lymphoma › diffuse large cell › centroblastic (of) (malignant)
C85
Other specified and unspecified types of non-Hodgkin lymphoma
Not billable
- Chapter 2
- Neoplasms
- Section
- C81-C96
Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027