Reduced Circulating 4 Hydroxyphenylpyruvate Dioxygenase Activity C4025587
Reduced 4-hydroxyphenylpyruvate dioxygenase activity affects tyrosine metabolism and can cause neurological symptoms. It is rare and managed with dietary restriction and supportive care.
Key facts at a glance
- ICD-10
- E88.9
- ICD-11
- 5A00.0
- Body system
- metabolic
- Severity
- moderate
- Chronic
- true
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy