2026 ICD-10-CM Diagnosis Code D64.1Secondary sideroblastic anemia due to disease

ICD-10-CM Codes›D50–D89›D60-D64›D64

ICD-10-CM D64.1
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

D64.1 is a billable ICD-10-CM diagnosis code for secondary sideroblastic anemia due to disease. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 811 through 812. The code is a manifestation code that cannot be reported as the principal diagnosis. Coders also document this condition as secondary acquired sideroblastic anemia. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Aplastic anemia.

Code Identity

ICD-10-CM Code
D64.1
Billable Status
Yes — Valid for Submission
Code Describes
Secondary sideroblastic anemia due to disease
Short Description
Secondary sideroblastic anemia due to disease
Same as the full description in the CMS dataset.
Parent Code
D64
Other anemias

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
CategoryD64Other anemias
This CodeD64.1Secondary sideroblastic anemia due to disease

Code EditsBilling

Medicare Code Editor checks that affect claim validity for D64.1.

Manifestation diagnoses
Manifestation codes describe the manifestation of an underlying disease, not the disease itself, and therefore should not be used as a principal diagnosis.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Secondary acquired sideroblastic anemia
  • Secondary sideroblastic anemia due to disease

Tabular List NotesGuidance

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

Code First

  • underlying disease

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.

    • Anemia(essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound)
      • sideroblastic
        • secondary (due to)
          • disease

Clinical ClassificationClinical

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

CCSR BLD003
Aplastic anemia
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Anemia

If you have anemia, your blood does not carry enough oxygen to the rest of your body. The most common cause of anemia is not having enough iron. Your body needs iron to make hemoglobin. Hemoglobin is an iron-rich protein that gives the red color to blood. It carries oxygen from the lungs to the rest of the body.

Read the full article at MedlinePlus

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

Convert D64.1 to ICD-9-CMHistory

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

ICD-9-CM
285.0 Sideroblastic anemia
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 D64.1Overview

Is D64.1 (Other anemias) a billable code?

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

What MS-DRG does D64.1 group to?

On inpatient claims, secondary sideroblastic anemia due to disease maps to MS-DRG 811, 812, with relative weights from 0.9182 to 1.4043 depending on complications. Higher weights mean higher Medicare reimbursement.

Can D64.1 be a principal diagnosis?

No. This is a manifestation code: secondary sideroblastic anemia due to disease describes the manifestation of an underlying disease rather than the disease itself, so the underlying condition is sequenced first.

What is the ICD-9 equivalent of D64.1?

Under the General Equivalence Mappings, secondary sideroblastic anemia due to disease converts to ICD-9-CM 285.0 (sideroblastic anemia). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.