Other disorders of fatty-acid oxidation

This code signifies a group of rare, inherited metabolic disorders where the body is unable to properly break down certain types of fatty acids for energy. These conditions result from deficiencies in specific enzymes or transport proteins involved in the fatty acid oxidation pathway, leading to an accumulation of toxic metabolites. Patients may present with a range of symptoms including hypoglycemia, cardiomyopathy, muscle weakness, and liver dysfunction.

Assign this code when documentation specifies a fatty-acid oxidation disorder that is not otherwise classified by a more specific ICD-10-CM code (e.g., carnitine palmitoyltransferase deficiency, medium-chain acyl-CoA dehydrogenase deficiency). This code is appropriate when the specific enzyme defect is known but lacks a dedicated code, or when the disorder is identified as a "fatty-acid oxidation disorder, type unspecified" or "other specified fatty-acid oxidation disorder."

• Always strive for the most specific diagnosis code available; only use this code when a more precise option is not provided.
• Ensure the medical record clearly identifies the condition as a fatty-acid oxidation disorder and specifies it as "other" or "unspecified" if a more granular code isn't applicable.
• Consider sequencing this code as a primary diagnosis when it is the reason for the encounter, or as a secondary diagnosis when it is a co-morbidity impacting patient care.