C96.2 – Malignant mast cell neoplasm

ICD-10-CM 2027 diagnosis code · Malignant neoplasms of lymphoid, hematopoietic and related tissue

Non-billable header

ICD-10-CM code C96.2

Code: C96.2 (claims format: C962)
Description: Malignant mast cell neoplasm
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 2. Neoplasms (C00-D49)
Block: C81-C96 Malignant neoplasms of lymphoid, hematopoietic and related tissue
Parent codes: C96

Billable codes under C96.2

C96.2 is a header code and cannot be used on claims. Choose the most specific code:

C96.20 – Malignant mast cell neoplasm, unspecifiedBillable
C96.21 – Aggressive systemic mastocytosisBillable
C96.22 – Mast cell sarcomaBillable
C96.29 – Other malignant mast cell neoplasmBillable

Notes for C96.2

Excludes1 (not coded here):

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

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

C96 – Other and unspecified malignant neoplasms of lymphoid, hematopoietic and related tissue

Excludes1 (not coded here):

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

Block C81-C96

Excludes2 (not included here):

Kaposi's sarcoma of lymph nodes (C46.3)
secondary and unspecified neoplasm of lymph nodes (C77.-)
secondary neoplasm of bone marrow (C79.52)
secondary neoplasm of spleen (C78.89)

Related codes in C96

Frequently asked questions

What is ICD-10 code C96.2?

C96.2 is the ICD-10-CM code for malignant mast cell neoplasm, in the block C81-C96 (Malignant neoplasms of lymphoid, hematopoietic and related tissue).

Is C96.2 a billable code?

No. C96.2 is a header code with more specific child codes; report one of the billable codes listed above.

What category does C96.2 belong to?

It belongs to category C96 – Other and unspecified malignant neoplasms of lymphoid, hematopoietic and related tissue.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.