C94.21 – Acute megakaryoblastic leukemia, in remission

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

Billable code

ICD-10-CM code C94.21

Code: C94.21 (claims format: C9421)
Description: Acute megakaryoblastic leukemia, in remission
Billable: Yes – valid for HIPAA-covered transactions
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: C94 › C94.2

Notes inherited from parent codes

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

C94 – Other leukemias of specified cell type

Excludes1 (not coded here):

leukemic reticuloendotheliosis (C91.4-)
myelodysplastic syndromes (D46.-)
personal history of leukemia (Z85.6)
plasma cell leukemia (C90.1-)

C94.2 – Acute megakaryoblastic leukemia

Applicable to:

Acute myeloid leukemia M7
Acute megakaryocytic leukemia

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 C94.2

Frequently asked questions

What is ICD-10 code C94.21?

C94.21 is the ICD-10-CM code for acute megakaryoblastic leukemia, in remission, in the block C81-C96 (Malignant neoplasms of lymphoid, hematopoietic and related tissue).

Is C94.21 a billable code?

Yes. C94.21 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does C94.21 belong to?

It belongs to category C94 – Other leukemias of specified cell type.

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.