ICD-10-CM 2027
ICD-10 code for Harley's disease
From the official ICD-10-CM alphabetic index entry “Harley's disease”. Page updated September 29, 2026.
About coding Harley's disease
The ICD-10-CM code for Harley's disease is D59.6 (Hemoglobinuria due to hemolysis from other external causes).
Within D59, choose D59.6 (Hemoglobinuria due to hemolysis from other external causes) only when documentation doesn't support a more specific option: drug-induced autoimmune hemolytic anemia (D59.0), other autoimmune hemolytic anemias (D59.1), drug-induced nonautoimmune hemolytic anemia (D59.2), hemolytic-uremic syndrome (D59.3), other nonautoimmune hemolytic anemias (D59.4), paroxysmal nocturnal hemoglobinuria [Marchiafava-Micheli] (D59.5), other acquired hemolytic anemias (D59.8) and unspecified (D59.9).
Don't report D59.6 together with the conditions in its Excludes1 note: hemoglobinuria NOS (R82.3).
Use an additional code (Chapter 20) to identify external cause.
Don't confuse with (Excludes1 for D59.6)
- hemoglobinuria NOS (R82.3)
Common questions about Harley's disease ICD-10 codes
What is the ICD-10 code for Harley's disease?
- D59.6 — Hemoglobinuria due to hemolysis from other external causes.
Is D59.6 billable?
- Yes. D59.6 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can D59.6 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict D59.6 as a principal diagnosis.
Is D59.6 a CC or MCC?
- No. D59.6 is neither a CC nor an MCC under MS-DRG v44.0.