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ICD-10 Code D64.9: Anemia, unspecified

D64.9 is a billable ICD-10 diagnosis code used to classify Anemia, unspecified in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89).

Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89).

When is it used?

  • May be used when a clinician documents anemia, unspecified in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter
3Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89)
block
D60-D64Aplastic and other anemias and other bone marrow failure syndromes
category
D64Other anemias
currentD64

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

HematologistGeneral Physician

Related tests

Complete blood count
Often used to review hemoglobin and red-cell indices in anemia workup.
Peripheral blood smear
May help characterize red-cell morphology in anemia evaluation.
Vitamin B12
May be relevant in selected anemia evaluations depending on clinical context.

Coverage-related procedures and services

CPT 81450high
HEMATOLYMPHOID NEOPLASM OR DISORDER, GENOMIC SEQUENCE ANALYSIS PANEL, 5-50 GENES, INTERROGATION FOR SEQUENCE VARIANTS, AND COPY NUMBER VARIANTS OR REARRANGEMENTS, OR ISOFORM EXPRESSION OR MRNA EXPRESSION LEVELS, IF PERFORMED; DNA ANALYSIS OR COMBINED DNA AND RNA ANALYSIS
Source: CMS coverage guidance
CPT 81451high
HEMATOLYMPHOID NEOPLASM OR DISORDER, GENOMIC SEQUENCE ANALYSIS PANEL, 5-50 GENES, INTERROGATION FOR SEQUENCE VARIANTS, AND COPY NUMBER VARIANTS OR REARRANGEMENTS, OR ISOFORM EXPRESSION OR MRNA EXPRESSION LEVELS, IF PERFORMED; RNA ANALYSIS
Source: CMS coverage guidance
CPT 81479high
UNLISTED MOLECULAR PATHOLOGY PROCEDURE
Source: CMS coverage guidance
CPT 88182high
FLOW CYTOMETRY, CELL CYCLE OR DNA ANALYSIS
Source: CMS coverage guidance
CPT 88185high
FLOW CYTOMETRY, CELL SURFACE, CYTOPLASMIC, OR NUCLEAR MARKER, TECHNICAL COMPONENT ONLY; EACH ADDITIONAL MARKER (LIST SEPARATELY IN ADDITION TO CODE FOR FIRST MARKER)
Source: CMS coverage guidance
CPT 88184high
FLOW CYTOMETRY, CELL SURFACE, CYTOPLASMIC, OR NUCLEAR MARKER, TECHNICAL COMPONENT ONLY; FIRST MARKER
Source: CMS coverage guidance

Coding guidelines

Compatibility

Legacy and official ICD code match exactly.
Legacy codes
D64.9

Common synonyms

Anemia, unspecifiedAnemia

Frequently asked questions

Code details

CodeD64.9
SystemICD10
Display nameAnemia, unspecified
ChapterDiseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89)
BlockAplastic and other anemias and other bone marrow failure syndromes

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
Anemia(essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound)Anemia(essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound)Anemia(essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound)Anemia(essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound)Anemia(essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound)Deficiency, deficientHemoglobinLowLowOligocythemia

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

ICD-10 Code D64.9 for Anemia, unspecified | HealthAssure