ICD-10-CM 2027
ICD-10 code for erythrocytosis
From the official ICD-10-CM alphabetic index entry “Erythrocytosis (megalosplenic) (secondary)”. Page updated September 29, 2026.
About coding erythrocytosis
The ICD-10-CM code for erythrocytosis is D75.1 (Secondary polycythemia). The official index lists 3 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on D75.1.
Within D75 (other and unspecified diseases of blood and blood-forming organs), D75.1 is specifically for secondary polycythemia. Related codes cover familial erythrocytosis (D75.0), other specified diseases of blood and blood-forming organs (D75.8), disease of blood and blood-forming organs, unspecified (D75.9) and glucose-6-phosphate dehydrogenase (G6PD) deficiency without anemia (D75.A).
Don't report D75.1 together with the conditions in its Excludes1 note: polycythemia neonatorum (P61.1) and polycythemia vera (D45).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific erythrocytosis codes (official index)
Don't confuse with (Excludes1 for D75.1)
Common questions about erythrocytosis ICD-10 codes
What is the ICD-10 code for erythrocytosis?
- D75.1 — Secondary polycythemia. More specific codes apply when the documentation supports them: D75.0, D75.1, D75.1.
What is the ICD-10 code for familial erythrocytosis?
- D75.0 — Familial erythrocytosis.
What is the ICD-10 code for secondary erythrocytosis?
- D75.1 — Secondary polycythemia.
What is the ICD-10 code for stress erythrocytosis?
- D75.1 — Secondary polycythemia.
Is D75.1 billable?
- Yes. D75.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can D75.1 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict D75.1 as a principal diagnosis.
Is D75.1 a CC or MCC?
- No. D75.1 is neither a CC nor an MCC under MS-DRG v44.0.