Other disorders originating in the perinatal period (P90-P96)

ICD-10 codes P90-P96 cover a wide range of disorders that originate in the perinatal period, focusing on conditions affecting newborns shortly before, during, or after birth. These include neurological problems like P90 convulsions of newborn, feeding difficulties such as P92 feeding problems of newborn, and other neonatal complications like drug reactions, muscle tone disorders, and stillbirth.

This code range is specifically used to classify various neonatal conditions seldom seen after the first month of life. It includes detailed codes for neonatal cerebral disturbances (P91), such as neonatal cerebral ischemia, leukomalacia, encephalopathy, and cerebral infarction. The codes embrace synonyms like "neonatal seizure" for P90 and "hypoxic ischemic encephalopathy (HIE)" across the P91.6x series, helping coders link clinical terms to appropriate codes. Feeding disorders range from vomiting (P92.0), regurgitation (P92.1), failure to thrive (P92.6), to difficulties breastfeeding (P92.5). The chapter also accounts for neonatal drug reactions including Grey baby syndrome (P93.0), and muscle tone problems like transient neonatal myasthenia gravis (P94.0). Codes P95 and P96 capture stillbirth and other perinatal conditions such as congenital renal failure and withdrawal symptoms from maternal drug use. This comprehensive set assists medical professionals in accurately identifying and documenting specific newborn disorders related to the critical perinatal period.