2026 ICD-10-CM Diagnosis Code E71.311Medium chain acyl CoA dehydrogenase deficiency

ICD-10-CM Codes›E00–E89›E70-E88›E71

ICD-10-CM E71.311
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

E71.311 is a billable ICD-10-CM diagnosis code for medium chain acyl CoA dehydrogenase deficiency. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as Acyl-CoA dehydrogenase deficiency. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified nutritional and metabolic disorders.

Code Identity

ICD-10-CM Code
E71.311
Billable Status
Yes — Valid for Submission
Code Describes
Medium chain acyl CoA dehydrogenase deficiency
Short Description
Medium chain acyl CoA dehydrogenase deficiency
Same as the full description in the CMS dataset.
Parent Code
E71.31
Disorders of fatty-acid oxidation

Code Classification

ChapterE00–E89Endocrine, nutritional and metabolic diseases
SectionE70-E88Metabolic disorders
CategoryE71Disorders of branched-chain amino-acid metabolism and fatty-acid metabolism
This CodeE71.311Medium chain acyl CoA dehydrogenase deficiency

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acyl-CoA dehydrogenase deficiency
  • Medium-chain acyl-coenzyme A dehydrogenase deficiency

Tabular List NotesGuidance

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

Inclusion Terms

  • MCAD deficiency

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.

    • Deficiency, deficient
      • dehydrogenase
        • medium chain acyl CoA
    • Deficiency, deficient
      • MCAD (medium chain acyl CoA dehydrogenase deficiency)
    • Disorder(of)
      • fatty acid
        • oxidation
          • MCAD

Clinical ClassificationClinical

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

CCSR END016
Other specified and unspecified nutritional and metabolic disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Lipid Metabolism Disorders

Metabolism is the process your body uses to make energy from the food you eat. Food is made up of proteins, carbohydrates, and fats. Chemicals in your digestive system (enzymes) break the food parts down into sugars and acids, your body's fuel. Your body can use this fuel right away, or it can store the energy in your body tissues.

Read the full article at MedlinePlus

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

Convert E71.311 to ICD-9-CMHistory

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

ICD-9-CM
277.85 Disorders acid oxidation
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 E71.311Overview

Is E71.311 (Disorders of fatty-acid oxidation) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report medium chain acyl CoA dehydrogenase deficiency on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What is the ICD-9 equivalent of E71.311?

Under the General Equivalence Mappings, medium chain acyl CoA dehydrogenase deficiency converts to ICD-9-CM 277.85 (disorders acid oxidation). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.