2027 ICD-10-CM Diagnosis Code E61.1Iron deficiency

ICD-10-CM Codes›E00–E89›E50-E64›E61

ICD-10-CM E61.1
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

E61.1 is a billable ICD-10-CM diagnosis code for iron deficiency. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 640 through 641. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Nutritional deficiencies.

Code Identity

ICD-10-CM Code
E61.1
Billable Status
Yes — Valid for Submission
Code Describes
Iron deficiency
Short Description
Iron deficiency
Same as the full description in the CMS dataset.
Parent Code
E61
Deficiency of other nutrient elements

Code Classification

ChapterE00–E89Endocrine, nutritional and metabolic diseases
SectionE50-E64Other nutritional deficiencies
CategoryE61Deficiency of other nutrient elements
This CodeE61.1Iron deficiency

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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to E61.1: its own notes plus those printed at E61, block E50-E64, and Chapter 4. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

On E61.1 itself
  • iron deficiency anemia (D50.-)
From E61 Deficiency of other nutrient elements applies to 10 codes
  • disorders of mineral metabolism (E83.-)
  • iodine deficiency related thyroid disorders (E00-E02)
  • sequelae of malnutrition and other nutritional deficiencies (E64.-)
From Chapter 4 (E00-E89) Endocrine, nutritional and metabolic diseases applies to 973 codes
  • transitory endocrine and metabolic disorders specific to newborn (P70-P74)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Block E50-E64 Other nutritional deficiencies applies to 50 codes

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From E61 Deficiency of other nutrient elements applies to 10 codes
  • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)

Notes

General instructions on how these codes are used.

From Chapter 4 (E00-E89) Endocrine, nutritional and metabolic diseases applies to 973 codes
  • All neoplasms, whether functionally active or not, are classified in Chapter 2. Appropriate codes in this chapter (i.e. E05.8, E07.0, E16-E31, E34.-) may be used as additional codes to indicate either functional activity by neoplasms and ectopic endocrine tissue or hyperfunction and hypofunction of endocrine glands associated with neoplasms and other conditions classified elsewhere.

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name E61.1, its category, or a range that includes it.

Applicable To 1

These notes mention E61.1.

  • P00.4 Newborn affected by maternal nutritional disorders
    Newborn affected by maternal disorders classifiable to E40-E64 names E40-E64, which includes this code

Excludes1 4

These codes carry an Excludes1 note naming E61.1: they are not reported together with it, unless the two conditions are unrelated.

  • T45.4X6 Underdosing of iron and its compounds
    iron deficiency (E61.1)
  • E83 Disorders of mineral metabolism
    dietary mineral deficiency (E58-E61) names E58-E61, which includes this code
  • R79.0 Abnormal level of blood mineral
    nutritional mineral deficiency (E58-E61) names E58-E61, which includes this code
  • Z72.4 Inappropriate diet and eating habits
    malnutrition and other nutritional deficiencies (E40-E64) names E40-E64, which includes this code

Code First 1

These codes say to code first a condition named in the note, and E61.1 is one of the conditions named.

  • G63 Polyneuropathy in diseases classified elsewhere
    nutritional deficiency (E40-E64) names E40-E64, which includes this code

Notes 1

These notes mention E61.1.

  • E64 Sequelae of malnutrition and other nutritional deficiencies
    This category is to be used to indicate conditions in categories E43, E44, E46, E50-E63 as the cause of sequelae, which are themselves classified elsewhere. The 'sequelae' include conditions specified as such; they also include the late effects of diseases classifiable to the above categories if the disease itself is no longer present names E50-E63, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

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

CCSR END007
Nutritional deficiencies
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Iron Deficiencies

    deficient amounts of iron in the body as a result of blood loss, diets deficient in iron, or an iron uptake or storage disorder.

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.

ICD-9-CM
269.3 Mineral deficiency NEC
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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About E61.1Overview

What is the ICD-10 code for iron deficiency?

The ICD-10-CM code for iron deficiency is E61.1 (sometimes written as E611). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

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, 2026 through September 30, 2027.

What MS-DRG does E61.1 group to?

When iron deficiency is the principal diagnosis on an inpatient stay, it groups to MS-DRG 641, 640, with relative weights from 0.7864 to 1.3392 depending on complications. Higher weights mean higher Medicare reimbursement.

Can E61.1 be reported with a code from D50?

Not as a rule. The Excludes1 note on E61.1 lists "iron deficiency anemia (D50.-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

Does E61.1 need an additional code?

When the condition applies, yes. The Use Additional Code note at E61, which applies to E61.1, reads: code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5). The additional code is reported after E61.1.