ICD-10 Code E71.39 – Other disorders of fatty-acid metabolism (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E71.39 – Other disorders of fatty-acid metabolism
What it is
E71.39 identifies a disorder affecting how the body breaks down fatty acids for energy. Use it when documentation states a fatty-acid metabolism disorder that does not fit a more specific ICD-10-CM code.
Clinical signs
Clinical features vary; refer to documentation. Reported findings may include recurrent hypoglycemia, lethargy, muscle weakness, or episodes triggered by fasting or illness, depending on the specific metabolic defect.
When to use this code
Use this code when the clinician documents a fatty-acid oxidation or metabolism disorder without naming a more specific subtype. It also fits nonspecific hereditary or acquired fatty-acid metabolic conditions documented in the chart. If the record names a distinct disorder, code that condition instead.
Do not use for
Do not use E71.39 for general lipid disorders, obesity, or nonspecific malnutrition. Do not choose it when documentation supports a more specific inborn error of metabolism or another coded diagnosis.
Coding tip
Check the provider’s exact wording for the specific fatty-acid disorder before assigning E71.39.