D59.13 Mixed type autoimmune hemolytic anemia

The ICD-10-CM code for Mixed type autoimmune hemolytic anemia is D59.13 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

3: Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89)

Section

D55-D59: Hemolytic anemias (D55-D59)

Category D59

19 codes (16 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to D59.13:

• Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound) › hemolytic › mixed type (primary) (secondary) (symptomatic)
• Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound) › hemolytic › autoimmune › mixed
• Disease, diseased › autoimmune (systemic) NOS › hemolytic › mixed type (primary) (secondary) (symptomatic)
• Disease, diseased › hemolytic (newborn) › autoimmune › mixed type (primary) (secondary) (symptomatic)
• Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound) › hemolytic › secondary › autoimmune › mixed type
• Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound) › hemolytic › symptomatic › autoimmune › mixed type
• Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound) › hemolytic › primary › autoimmune › mixed type

Inclusion Terms

• Mixed type autoimmune hemolytic disease
• Mixed type, cold and warm, (primary) (secondary) (symptomatic) autoimmune hemolytic anemia

U.S. Hospital Utilization

• An estimated 205 U.S. inpatient stays in 2023 included D59.13 among the documented diagnoses.
• 110 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Chapter 3 TOC entry

3. Chapter 3: Disease of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89) ............................................................................................. 39

Reserved for future guideline expansion

Reserved for future guideline expansion ...................................................................................... 39

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)