ICD-10-CM 2027 diagnosis code
D50.9Iron deficiency anemia, unspecified
D50.9 is a valid, billable ICD-10-CM code for iron deficiency anemia, unspecified. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
Looking up by condition? See ICD-10 code for Iron deficiency anemia, ICD-10 code for Chlorosis, ICD-10 code for Hyposiderinemia, ICD-10 code for Faber's syndrome.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About D50.9
D50.9 is the ICD-10-CM diagnosis code for iron deficiency anemia, unspecified. It belongs to category D50 (iron deficiency anemia), block D50-D53 (nutritional anemias) and chapter 3 (diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within D50, choose D50.9 (unspecified) only when documentation doesn't support a more specific option: secondary to blood loss (chronic) (D50.0), Sideropenic dysphagia (D50.1) and other iron deficiency anemias (D50.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 811 (Red Blood Cell Disorders with MCC, relative weight 1.3988) and DRG 812 (Red Blood Cell Disorders without MCC, relative weight 0.9234), in MDC 16 (Diseases and Disorders of the Blood and Blood Forming Organs and Immunological Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Before ICD-10, this condition was coded in ICD-9-CM as 280.9 (iron deficiency anemia, unspecified).
Notes that apply from higher levels
Instructions written at a parent level also apply to D50.9.
› From D50 Iron deficiency anemia
- asiderotic anemia
- hypochromic anemia
Broader instructions also apply from Chapter 3: Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism.
Alphabetic index entries
16 entriesTerms in the official ICD-10-CM index that lead to D50.9.
- Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound) › with (due to) (in) › koilonychia
- Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound) › asiderotic
- Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound) › deficiency › iron
- Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound) › due to (in) (with) › impaired absorption
- Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound) › Faber's (achlorhydric anemia)
- Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound) › hypochromic (idiopathic) (microcytic) (normoblastic)
- Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound) › iron deficiency
- Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound) › microcytic (hypochromic)
- Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound) › refractory › sideropenic
- Anemia (essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound) › sideropenic (refractory)
- Chlorosis
- Deficiency, deficient › iron › anemia
- Faber's syndrome (achlorhydric anemia)
- Hyposiderinemia
- Syndrome › Faber's
- Syndrome › Hayem-Faber
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC 16 · Diseases and Disorders of the Blood and Blood Forming Organs and Immunological Disorders
ICD-9-CM equivalent
Converter →- 280.9Iron deficiency anemia, unspecifiedexact
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about D50.9
Is D50.9 billable?
- Yes. D50.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can D50.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict D50.9 as a principal diagnosis.
Is D50.9 a CC or MCC?
- No. D50.9 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does D50.9 group to?
- D50.9 is used in the MS-DRG v44.0 logic for MS-DRG 811 (Red Blood Cell Disorders with MCC) and MS-DRG 812 (Red Blood Cell Disorders without MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.
What is the ICD-9 code for D50.9?
- The CMS General Equivalence Mappings map D50.9 to ICD-9-CM 280.9.