ICD-11 classes
05 Endocrine, nutritional or metabolic diseases
Metabolic disorders
Inborn errors of metabolism
5C50 — Inborn errors of amino acid or other organic acid metabolism
5C50.1 — Disorders of tyrosine metabolism
KB63.4 — Transitory tyrosinaemia of newborn
ICD-11 KB63.4 — Transitory tyrosinaemia of newborn
Clinically asymptomatic elevated blood tyrosine level caused by late fetal maturation of 4-hydroxyphenylpyruvate dioxygenase, usually detected on newborn bloodspot screening. Most commonly seen in premature infants receiving milk formulae with high protein content. Generally considered benign and resolves by 4-6 weeks of age.
The diagnosis includes nothing.
The diagnosis excludes nothing.
It has no clarifying diagnoses.
The diagnosis is coded elsewhere: