P37.9 Congenital infectious or parasitic disease, unspecified

Billable ICD-10-CM code, FY2026. Acts as a Major Complication or Comorbidity (MCC) as a secondary diagnosis.

Applies from P37 Other congenital infectious and parasitic diseases

Excludes2 (not included here)

• congenital syphilis (A50.-)
• infectious neonatal diarrhea (A00-A09)
• necrotizing enterocolitis in newborn (P77.-)
• noninfectious neonatal diarrhea (P78.3)
• ophthalmia neonatorum due to gonococcus (A54.31)
• tetanus neonatorum (A33)

MS-DRG index

Defines the logic of DRG(s) 791 in MDC 15.

Approximate ICD-9-CM (GEMs)

• 771.2 Other congenital infections specific to the perinatal period (approximate)

Code annotations containing back-references to P37.9

Back-references to P37

• Type 2 Excludes: P00.2 Newborn affected by maternal infectious and parasitic diseases ("infections specific to the perinatal period (P35-P39)")

Diagnosis Index entries for P37.9

• Disease, diseased › infectious, infective › congenital
• Infection, infected, infective (opportunistic) › congenital › infectious or parasitic disease

Nearby codes

• P37.2 Neonatal (disseminated) listeriosis
• P37.3 Congenital falciparum malaria
• P37.4 Other congenital malaria
• P37.5 Neonatal candidiasis
• P37.8 Other specified congenital infectious and parasitic diseases
• P37.9 Congenital infectious or parasitic disease, unspecified (this code)