2026 ICD-10-CM Diagnosis Code E61.1Iron deficiency
ICD-10-CM Codes›E00–E89›E50-E64›E61
- Billable — Valid for Submission
- Not Chronic
E61.1 is a billable ICD-10-CM diagnosis code for iron deficiency. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 640 through 641. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Nutritional deficiencies.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Alopecia due to iron deficiency
- Alopecia due to underlying disease
- Dementia due to iron deficiency
- Dementia due to nutritional deficiency
- Developmental academic disorder due to iron deficiency
- Developmental academic disorder due to micronutrient deficiency
- Hair changes due to malnutrition
- Inadequate intake of iron
- Iron deficiency
- Iron deficiency glossitis
- Iron deficiency without anemia
- Non-anemic red cell disorder
- Skin changes due to malnutrition
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Type 1 Excludes
- iron deficiency anemia D50
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- iron - E61.1
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Deficiency, deficient
- iron
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Iron Deficiency
subnormal concentrations of iron resulting from low iron intake, inefficient iron absorption in the gastrointestinal tract, or increased iron loss.Iron Deficiency without Anemia|Non-Anemic Iron Deficiency
subnormal concentrations of iron resulting from low iron intake, inefficient iron absorption in the gastrointestinal tract, or increased iron loss; occurring in the absence of anemia.Iron-Deficiency Anemia|Iron deficiency anemia, unspecified
anemia caused by low iron intake, inefficient iron absorption in the gastrointestinal tract, or chronic blood loss.Other Iron Deficiency Anemias|Other iron deficiency anemias
evidence of other iron deficiency anemias not specified elsewhere.
Patient EducationClinical
Iron
Iron is a mineral that our bodies need for growth and development. Your body uses iron to make hemoglobin, a protein in red blood cells. Hemoglobin carries oxygen from the lungs to all parts of the body. Iron is also important for healthy muscles, bone marrow, and organ function. Your body also needs iron to make some hormones.
The full article covers:
- What is iron?
- How do you get iron?
- What causes low iron?
- What happens if you don't get enough iron?
- What happens if you get too much iron?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert E61.1 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About E61.1Overview
Is E61.1 (Deficiency of other nutrient elements) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report iron deficiency on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does E61.1 group to?
When iron deficiency is the principal diagnosis on an inpatient stay, it groups to MS-DRG 640, 641, with relative weights from 0.7782 to 1.3356 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of E61.1?
Under the General Equivalence Mappings, iron deficiency converts to ICD-9-CM 269.3 (mineral deficiency NEC). 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.
