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Hematology ICD-10 Cheat Sheet
34 most-used billable ICD-10-CM diagnosis codes (of 35 common hematology codes)
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- B20Human immunodeficiency virus [HIV] disease
- B96.21Shiga toxin-producing Escherichia coli [E. coli] (STEC) O157 as the cause of diseases classified elsewhere
- C18.7Malignant neoplasm of sigmoid colon
- C20Malignant neoplasm of rectum
- C40.01Malignant neoplasm of scapula and long bones of right upper limb
- C40.02Malignant neoplasm of scapula and long bones of left upper limb
- C40.21Malignant neoplasm of long bones of right lower limb
- C40.22Malignant neoplasm of long bones of left lower limb
- C46.0Kaposi's sarcoma of skin
- C50.411Malignant neoplasm of upper-outer quadrant of right female breast
- C50.412Malignant neoplasm of upper-outer quadrant of left female breast
- C50.811Malignant neoplasm of overlapping sites of right female breast
- C50.812Malignant neoplasm of overlapping sites of left female breast
- C56.1Malignant neoplasm of right ovary
- C56.2Malignant neoplasm of left ovary
- C61Malignant neoplasm of prostate
- C67.4Malignant neoplasm of posterior wall of bladder
- C95.00Acute leukemia of unspecified cell type not having achieved remission
- C95.10Chronic leukemia of unspecified cell type not having achieved remission
- D06.0Carcinoma in situ of endocervix
- D06.1Carcinoma in situ of exocervix
- D06.7Carcinoma in situ of other parts of cervix
- D46.0Refractory anemia without ring sideroblasts, so stated
- D46.1Refractory anemia with ring sideroblasts
- D46.21Refractory anemia with excess of blasts 1
- D46.22Refractory anemia with excess of blasts 2
- D46.ARefractory cytopenia with multilineage dysplasia
- D46.BRefractory cytopenia with multilineage dysplasia and ring sideroblasts
- D46.CMyelodysplastic syndrome with isolated del(5q) chromosomal abnormality
- D47.3Essential (hemorrhagic) thrombocythemia
- D56.0Alpha thalassemia
- D64.0Hereditary sideroblastic anemia
- D64.1Secondary sideroblastic anemia due to disease
- D64.2Secondary sideroblastic anemia due to drugs and toxins
Excludes1 traps — never code together
- B20✗ asymptomatic human immunodeficiency virus [HIV] infection status (Z21)
- C18.7✗ malignant neoplasm of rectosigmoid junction (C19)
- C20✗ malignant carcinoid tumor of the rectum (C7A.026)
- C61✗ malignant neoplasm of seminal vesicle (C63.7)
- D56.0✗ alpha thalassemia trait or minor (D56.3)
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Need the full list? All 35 common hematology codes · Check a claim in the ICD-10 validator
Codes reflect the FY2026 ICD-10-CM code set. Always verify against current coding guidelines before billing.