Alphabetic Index FY2027

D59.6

Hemoglobinuria due to hemolysis from other external causes

FY2027Chapter 3: Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism/D55–D59 Hemolytic anemias

BillableComplete code, valid to report
Care settingsHome Health Primary · MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases

D59.6 (also written D596) is a billable ICD-10-CM diagnosis code for hemoglobinuria due to hemolysis from other external causes. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 16 codes in category D59 (Acquired hemolytic anemia). The Alphabetic Index lists it under 12 entries. Its coding notes include a Use additional code instruction, 1 Excludes1 entry and 9 Excludes2 entries.

Use additional code

Add the listed code as a secondary code, if known.

This code
  • code (Chapter 20) to identify external cause

Excludes1

Not coded here. The listed conditions generally should not be reported together.

This code
  • hemoglobinuria NOS (R82.3)

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

Also from chapter/block level (9 notes)
Inherited from Chapter 3 Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
  • autoimmune disease (systemic) NOS (M35.9)
  • certain conditions originating in the perinatal period (P00-P96)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • human immunodeficiency virus [HIV] disease (B20)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Care settings

How CMS programs treat this code. These are CMS claim edits and list entries, not coverage or eligibility rules.

Home Health Primary

Accepted as the primary (principal) diagnosis on a home health claim. The Home Health Grouper assigns it to the MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases clinical group.

Source: CMS Home Health Grouper Software v07.2.26, effective October 1, 2026

Inclusion terms

Conditions classified to this code.

This code
  • Hemoglobinuria from exertion
  • March hemoglobinuria
  • Paroxysmal cold hemoglobinuria

Alphabetic Index terms

Terms the official Alphabetic Index lists for this code. 12 entries