C96.2

C96.2: Malignant mast cell neoplasm

Non-billable headerICD-10-CM

C96.2 is a non-billable header ICD-10-CM code for malignant mast cell neoplasm. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1: never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

indolent mastocytosis (D47.02)
mast cell leukemia (C94.30)
mastocytosis (congenital) (cutaneous) (Q82.2)

Excludes1 inherited from the categories above C96.2

A category’s note binds every code beneath it.

Written on C96: Other and unspecified malignant neoplasms of lymphoid, hematopoietic and related tissue

personal history of other malignant neoplasms of lymphoid, hematopoietic and related tissues (Z85.79)

Other codes that can never be billed with C96.2

Their own Excludes1 notes name this code, so the conflict is not listed above.

D47.02Systemic mastocytosis
D89.4Mast cell activation syndrome and related disorders
Q82.2Congenital cutaneous mastocytosis
D47.0Mast cell neoplasms of uncertain behavior
C77Secondary and unspecified malignant neoplasm of lymph nodes

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead C96.2

4 child codes. Green means billable.