C96.2 vs Q82.2
C96.2 (Malignant mast cell neoplasm) compared with Q82.2 (Congenital cutaneous mastocytosis), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. C96.2 carries an Excludes1 note covering Q82.2: “mastocytosis (congenital) (cutaneous) (Q82.2)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
No — do not report together. Q82.2 carries an Excludes1 note covering C96.2: “malignant mastocytosis (C96.2-)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| C96.2Malignant mast cell neoplasm | Q82.2Congenital cutaneous mastocytosis | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | C00-D49 — Neoplasms (C00-D49) | Q00-Q99 — Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99) |
| Definition | Malignant mast cell neoplasm is a non-billable ICD-10-CM category code (C96.2). | Congenital cutaneous mastocytosis is a billable ICD-10-CM diagnosis code (Q82.2). |
| Includes | — | Congenital diffuse cutaneous mastocytosis Congenital maculopapular cutaneous mastocytosis Congenital urticaria pigmentosa |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources