Skip to content
Dx

ICD-10-CM 2027 diagnosis code

E71.31Disorders of fatty-acid oxidation

Not billable — use a more specific code

E71.31 is a header code, so it can't be reported by itself. Choose one of the 6 more specific codes beneath it.

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 E71.31

E71.31 is the ICD-10-CM diagnosis code for disorders of fatty-acid oxidation. It belongs to category E71 (disorders of branched-chain amino-acid metabolism and fatty-acid metabolism), block E70-E88 (metabolic disorders) and chapter 4 (endocrine, nutritional and metabolic diseases). It is a header code, so it can't be reported by itself; one of its 6 subcodes must be used instead.

Within E71.3 (disorders of fatty-acid metabolism), E71.31 is specifically for disorders of fatty-acid oxidation. Related codes cover disorder of fatty-acid metabolism, unspecified (E71.30), disorders of ketone metabolism (E71.32) and other disorders of fatty-acid metabolism (E71.39).

To report this condition, pick the subcode that matches the documentation: E71.310 (deficiency), E71.311 (deficiency), E71.312 (deficiency), E71.313 (II), E71.314 (deficiency) and E71.318 (oxidation).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under E71.31

Notes that apply from higher levels

Instructions written at a parent level also apply to E71.31.

› From E71.3 Disorders of fatty-acid metabolism
Excludes1
  • peroxisomal disorders (E71.5)
  • Refsum's disease (G60.1)
  • Schilder's disease (G37.0)
Excludes2
  • carnitine deficiency due to inborn error of metabolism (E71.42)

Broader instructions also apply from E70-E88 Metabolic disorders and Chapter 4: Endocrine, nutritional and metabolic diseases.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about E71.31

Is E71.31 billable?

No. E71.31 is a header code. Report one of its more specific subcodes instead.