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P37.1

Congenital toxoplasmosis

Billable FY2026 2025-10-01 → 2026-09-30
Exclusions 21 never code together
P37code
Excludes2
  • congenital syphilis (A50.-)A50.-
  • infectious neonatal diarrhea (A00-A09)A00-A09
  • necrotizing enterocolitis in newborn (P77.-)P77.-
  • noninfectious neonatal diarrhea (P78.3)P78.3
  • ophthalmia neonatorum due to gonococcus (A54.31)A54.31
  • tetanus neonatorum (A33)A33
P35-P39block
Excludes2
  • asymptomatic human immunodeficiency virus [HIV] infection status (Z21)Z21
  • congenital gonococcal infection (A54.-)A54.-
  • congenital pneumonia (P23.-)P23.-
  • congenital syphilis (A50.-)A50.-
  • human immunodeficiency virus [HIV] disease (B20)B20
  • infant botulism (A48.51)A48.51
  • infectious diseases not specific to the perinatal period (A00-B99, J09, J10.-)A00-B99J09J10.-
  • intestinal infectious disease (A00-A09)A00-A09
  • laboratory evidence of human immunodeficiency virus [HIV] (R75)R75
  • tetanus neonatorum (A33)A33
P00-P96chapter
Excludes2
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)Q00-Q99
  • endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
  • injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
  • neoplasms (C00-D49)C00-D49
  • tetanus neonatorum (A33)A33

Excludes2 — not included here, but the patient may have both. Code both when documented.

Instructional notes 4
P37.1code
Inclusion terms
  • Hydrocephalus due to congenital toxoplasmosis
P35-P39block
Inclusion terms
  • Infections acquired in utero, during birth via the umbilicus, or during the first 28 days after birth
P00-P96chapter
Notes
  • Codes from this chapter are for use on newborn records only, never on maternal records
Includes
  • conditions that have their origin in the fetal or perinatal period (before birth through the first 28 days after birth) even if morbidity occurs later
Index entries leading here 13
  • Chorioretinitis — see also Inflammation, chorioretinal
    • in (due to)
      • toxoplasmosis (acquired) B58.01
        • congenital (active) P37.1
  • Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) G04.90
    • in (due to)
  • Uveitis (anterior) — see also Iridocyclitis
    • due to toxoplasmosis (acquired) B58.09
  • Infection, infected, infective (opportunistic) B99.9
    • congenital P39.9
      • toxoplasmosis (acute) (subacute) (chronic) P37.1
  • Meningoencephalitis G04.90
    • in (due to)
  • Meningoencephalomyelitis — see also Meningoencephalitis
    • due to
      • Toxoplasma or toxoplasmosis (acquired) B58.2
  • Pneumonitis (acute) (primary) J98.4
    • due to
  • Hepatitis K75.9
    • in (due to)
      • toxoplasmosis (acquired) B58.1
        • congenital (active) P37.1
  • Lymphadenopathy (generalized) R59.1
    • due to toxoplasmosis (acquired) B58.89
      • congenital (acute) (subacute) (chronic) P37.1
  • Toxoplasma, toxoplasmosis (acquired) B58.9
    • congenital (acute) (subacute) (chronic) P37.1
    • maternal, manifest toxoplasmosis in infant (acute) (subacute) (chronic) P37.1
  • Microphthalmos, microphthalmia (congenital) Q11.2
    • due to toxoplasmosis P37.1
  • Hydrocephalus (acquired) (external) (internal) (malignant) (recurrent) G91.9
    • due to toxoplasmosis (congenital) P37.1
  • Microcephalus, microcephalic, microcephaly Q02
    • due to toxoplasmosis (congenital) P37.1
Alongside this code 7 same parent — P37
P37.0 Congenital tuberculosis 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
Additional references
AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Risk adjustment

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This code

Billable
yes
Code set
FY2026
Parent
P37
Block
P35-P39
Siblings
7

Present FY2024–FY2027.