05Endocrine, nutritional or metabolic diseases
Metabolic disorders
Inborn errors of metabolism
5C50Inborn errors of amino acid or other organic acid metabolism
5C50.0Phenylketonuria
5C50.01
category
Nonclassical phenylketonuria
Definition Mild phenylketonuria is a rare form of phenylketonuria (PKU), an inborn error of amino acid metabolism, characterised by symptoms of PKU of mild to moderate severity.
Also indexed as
Atypical PKU - [phenylketonuria] Atypical phenylketonuria Nonclassical phenylketonuria
Nearby in Phenylketonuria
International Classification of Diseases, Eleventh Revision (ICD-11), World Health Organization (WHO) 2019/2021, https://icd.who.int/browse11. Licensed under Creative Commons Attribution-NoDerivatives 3.0 IGO (CC BY-ND 3.0 IGO).
Release 2026-01.
View this entity in the official WHO ICD-11 browser .
This page reproduces WHO classification content for reference. It is not
medical advice and must not be used to diagnose or treat. For coding
decisions, consult the official release and your national coding guidelines.
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