E71.511

HCC Category Mapping

What This Code Means

A rare inherited metabolic disorder affecting the nervous system and adrenal glands, presenting in newborns with developmental problems and progressive neurological decline.

Coding Tips

• •Document the age of symptom onset and specific neurological manifestations (seizures, hypotonia, developmental regression)
• •Distinguish from childhood and adolescent forms (E71.520, E71.521) which have later onset and different progression patterns

Clinical Significance

Neonatal adrenoleukodystrophy is an intermediate-severity peroxisome biogenesis disorder on the Zellweger spectrum, presenting in the neonatal period with hypotonia, seizures, and developmental delay, but with some residual peroxisomal function unlike classic Zellweger syndrome. Patients may survive into childhood but typically experience progressive neurological decline, adrenal insufficiency, and sensorineural hearing loss. Early identification of adrenal insufficiency is critical for management.

Documentation Requirements

• ✓Document age of presentation, neurological findings, adrenal function testing results, very long chain fatty acid levels, peroxisomal function studies, and genetic testing for PEX gene mutations.
• ✓Record developmental milestones, hearing assessments, and adrenal replacement therapy if indicated.

Commonly Confused Codes