2026 ICD-10-CM Diagnosis Code D61.9Aplastic anemia, unspecified

ICD-10-CM Codes›D50–D89›D60-D64›D61

ICD-10-CM D61.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

D61.9 is a billable ICD-10-CM diagnosis code for aplastic anemia, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 808 through 810. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Aplastic anemia.

Code Identity

ICD-10-CM Code
D61.9
Billable Status
Yes — Valid for Submission
Code Describes
Aplastic anemia, unspecified
Short Description
Aplastic anemia, unspecified
Same as the full description in the CMS dataset.
Parent Code
D61
Other aplastic anemias and other bone marrow failure syndromes

Code Classification

ChapterD50–D89Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
SectionD60-D64Aplastic and other anemias and other bone marrow failure syndromes
CategoryD61Other aplastic anemias and other bone marrow failure syndromes
This CodeD61.9Aplastic anemia, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Anemia co-occurrent with human immunodeficiency virus infection
  • Anemia in mother complicating pregnancy, childbirth AND/OR puerperium
  • Anemia of endocrine disorder
  • Aplastic anemia
  • Aplastic anemia associated with metabolic alteration
  • Aplastic anemia associated with pancreatitis
  • Aplastic anemia associated with pregnancy
  • Aplastic anemia co-occurrent with human immunodeficiency virus infection
  • Aplastic anemia due to chronic disease
  • Aplastic anemia with AIDS
  • Aplastic bone marrow
  • Aplastic crisis
  • Hematopoietic aplasia
  • Hematopoietic system disease with AIDS
  • Hypocellular bone marrow
  • Hypoplastic anemia
  • Immunologic aplastic anemia
  • Nodular hyperplasia of liver
  • Nodular regenerative hyperplasia of liver
  • Nodule of liver
  • Pulmonary fibrosis, hepatic hyperplasia, bone marrow hypoplasia syndrome
  • Secondary aplastic anemia
  • Thrombocytopenia with AIDS
  • Transient hypoplastic anemia

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Hypoplastic anemia NOS
  • Medullary hypoplasia

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Aleukia
      • hemorrhagica
    • Anemia(essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound)
      • aplastic
    • Anemia(essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound)
      • hypoplasia, red blood cells
    • Anemia(essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound)
      • hypoplastic (idiopathic)
    • Anemia(essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound)
      • hypoproliferative (refractive)
    • Aplasia
      • bone marrow (myeloid)
    • Hypoplasia, hypoplastic
      • bone NOS
        • marrow
    • Hypoplasia, hypoplastic
      • medullary
    • Marrow(bone)
      • arrest
    • Panhematopenia
    • Panhemocytopenia

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR BLD003
Aplastic anemia
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Aplastic Anemia

Aplastic anemia is a rare but serious blood disorder. If you have it, your bone marrow doesn't make enough new blood cells. It happens when there is damage to stem cells inside your bone marrow. There are different types of aplastic anemia, including Fanconi anemia.

The full article covers:

  • What is aplastic anemia?
  • What causes aplastic anemia?
  • What are the symptoms of aplastic anemia?
  • What other problems can aplastic anemia cause?
  • How is aplastic anemia diagnosed?
  • What are the treatments for aplastic anemia?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert D61.9 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
284.9 Aplastic anemia NOS
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About D61.9Overview

Is D61.9 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report aplastic anemia, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does D61.9 group to?

When aplastic anemia, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 808, 809, 810, with relative weights from 1.0466 to 2.2079 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of D61.9?

Under the General Equivalence Mappings, aplastic anemia, unspecified converts to ICD-9-CM 284.9 (aplastic anemia NOS). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.