2022 ICD-10-CM Diagnosis Code P37.1

Congenital toxoplasmosis

    2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code Code on Newborn Record
  • P37.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2022 edition of ICD-10-CM P37.1 became effective on October 1, 2021.
  • This is the American ICD-10-CM version of P37.1 - other international versions of ICD-10 P37.1 may differ.
ICD-10-CM Coding Rules
  • P37.1 should be used on the newborn record - not on the maternal record.
Applicable To
  • Hydrocephalus due to congenital toxoplasmosis
The following code(s) above P37.1 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to P37.1:
  • P00-P96
    2022 ICD-10-CM Range P00-P96

    Certain conditions originating in the perinatal period

    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
    Note
    • Codes from this chapter are for use on newborn records only, never on maternal records
    Type 2 Excludes
    • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • tetanus neonatorum (A33)
    Certain conditions originating in the perinatal period
  • P35-P39
    2022 ICD-10-CM Range P35-P39

    Infections specific to the perinatal period

    Applicable To
    • Infections acquired in utero, during birth via the umbilicus, or during the first 28 days after birth
    Type 2 Excludes
    • asymptomatic human immunodeficiency virus [HIV] infection status (Z21)
    • congenital gonococcal infection (A54.-)
    • congenital pneumonia (P23.-)
    • congenital syphilis (A50.-)
    • human immunodeficiency virus [HIV] disease (B20)
    • infant botulism (A48.51)
    • infectious diseases not specific to the perinatal period (A00-B99, J09, J10.-)
    • intestinal infectious disease (A00-A09)
    • laboratory evidence of human immunodeficiency virus [HIV] (R75)
    • tetanus neonatorum (A33)
    Infections specific to the perinatal period
  • P37
    ICD-10-CM Diagnosis Code P37

    Other congenital infectious and parasitic diseases

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    Type 2 Excludes
    • 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)
    Other congenital infectious and parasitic diseases
Clinical Information
  • Passed from mother to fetus.
  • Prenatal protozoal infection with toxoplasma gondii which is associated with injury to the developing fetal nervous system. The severity of this condition is related to the stage of pregnancy during which the infection occurs; first trimester infections are associated with a greater degree of neurologic dysfunction. Clinical features include hydrocephalus; microcephaly; deafness; cerebral calcifications; seizures; and psychomotor retardation. Signs of a systemic infection may also be present at birth, including fever, rash, and hepatosplenomegaly. (from Adams et al., Principles of Neurology, 6th ed, p735)
ICD-10-CM P37.1 is grouped within Diagnostic Related Group(s) (MS-DRG v39.0):
  • 791 Prematurity with major problems
  • 793 Full term neonate with major problems

Convert P37.1 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
Code annotations containing back-references to P37.1:
  • Code First: G05
    , H32
    , K77
    ICD-10-CM Diagnosis Code G05

    Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    Code First
    • underlying disease, such as:
    • congenital toxoplasmosis encephalitis, myelitis and encephalomyelitis (P37.1)
    • cytomegaloviral encephalitis, myelitis and encephalomyelitis (B25.8)
    • encephalitis, myelitis and encephalomyelitis (in) systemic lupus erythematosus (M32.19)
    • eosinophilic meningoencephalitis (B83.2)
    • human immunodeficiency virus [HIV] disease (B20)
    • poliovirus (A80.-)
    • suppurative otitis media (H66.01-H66.4)
    • trichinellosis (B75)
    Type 1 Excludes
    • adenoviral encephalitis, myelitis and encephalomyelitis (A85.1)
    • encephalitis, myelitis and encephalomyelitis (in) measles (B05.0)
    • enteroviral encephalitis, myelitis and encephalomyelitis (A85.0)
    • herpesviral [herpes simplex] encephalitis, myelitis and encephalomyelitis (B00.4)
    • listerial encephalitis, myelitis and encephalomyelitis (A32.12)
    • meningococcal encephalitis, myelitis and encephalomyelitis (A39.81)
    • mumps encephalitis, myelitis and encephalomyelitis (B26.2)
    • postchickenpox encephalitis, myelitis and encephalomyelitis (B01.1-)
    • rubella encephalitis, myelitis and encephalomyelitis (B06.01)
    • toxoplasmosis encephalitis, myelitis and encephalomyelitis (B58.2)
    • zoster encephalitis, myelitis and encephalomyelitis (B02.0)
    ICD-10-CM Diagnosis Code H32

    Chorioretinal disorders in diseases classified elsewhere

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code Manifestation Code
    Code First
    • underlying disease, such as:
    • congenital toxoplasmosis (P37.1)
    • histoplasmosis (B39.-)
    • leprosy (A30.-)
    Type 1 Excludes
    • chorioretinitis (in):
    • toxoplasmosis (acquired) (B58.01)
    • tuberculosis (A18.53)
    ICD-10-CM Diagnosis Code K77

    Liver disorders in diseases classified elsewhere

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code Manifestation Code
    Code First
    Type 1 Excludes
    • alcoholic hepatitis (K70.1-)
    • alcoholic liver disease (K70.-)
    • cytomegaloviral hepatitis (B25.1)
    • herpesviral [herpes simplex] hepatitis (B00.81)
    • mumps hepatitis (B26.81)
    • sarcoidosis with liver disease (D86.89)
    • secondary syphilis with liver disease (A51.45)
    • syphilis (late) with liver disease (A52.74)
    • toxoplasmosis (acquired) hepatitis (B58.1)
    • tuberculosis with liver disease (A18.83)
  • Type 1 Excludes: B58
    , G91.4
    , Q03
    ICD-10-CM Diagnosis Code B58

    Toxoplasmosis

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    Includes
    • infection due to Toxoplasma gondii
    Type 1 Excludes
    • congenital toxoplasmosis (P37.1)
    ICD-10-CM Diagnosis Code G91.4

    Hydrocephalus in diseases classified elsewhere

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code Manifestation Code
    Code First
    • underlying condition, such as:
    • congenital syphilis (A50.4-)
    • neoplasm (C00-D49)
    • plasminogen deficiency (E88.02)
    Type 1 Excludes
    • hydrocephalus due to congenital toxoplasmosis (P37.1)
    ICD-10-CM Diagnosis Code Q03

    Congenital hydrocephalus

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    Includes
    • hydrocephalus in newborn
    Type 1 Excludes
    • Arnold-Chiari syndrome, type II (Q07.0-)
    • acquired hydrocephalus (G91.-)
    • hydrocephalus due to congenital toxoplasmosis (P37.1)
    • hydrocephalus with spina bifida (Q05.0-Q05.4)

Diagnosis Index entries containing back-references to P37.1:
  • Chorioretinitis - see also Inflammation, chorioretinal
    • in (due to)
      • toxoplasmosis (acquired) B58.01
        ICD-10-CM Diagnosis Code B58.01

        Toxoplasma chorioretinitis

          2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
        • congenital P37.1 (active)
  • Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) G04.90
    ICD-10-CM Diagnosis Code G04.90

    Encephalitis and encephalomyelitis, unspecified

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    Applicable To
    • Ventriculitis (cerebral) NOS
    • in (due to)
      • toxoplasmosis (acquired) B58.2
        ICD-10-CM Diagnosis Code B58.2

        Toxoplasma meningoencephalitis

          2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
        • congenital P37.1
  • Hepatitis K75.9
    ICD-10-CM Diagnosis Code K75.9

    Inflammatory liver disease, unspecified

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    Applicable To
    • Hepatitis NOS
    Type 1 Excludes
    • acute or subacute hepatitis (K72.0-)
    • chronic hepatitis NEC (K73.-)
    • viral hepatitis (B15-B19)
    • in (due to)
      • toxoplasmosis (acquired) B58.1
        ICD-10-CM Diagnosis Code B58.1

        Toxoplasma hepatitis

          2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
        • congenital P37.1 (active)
  • Hydrocephalus (acquired) (external) (internal) (malignant) (recurrent) G91.9
    ICD-10-CM Diagnosis Code G91.9

    Hydrocephalus, unspecified

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    • due to toxoplasmosis P37.1 (congenital)
  • Infection, infected, infective (opportunistic) B99.9
    ICD-10-CM Diagnosis Code B99.9

    Unspecified infectious disease

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    • congenital P39.9
      ICD-10-CM Diagnosis Code P39.9

      Infection specific to the perinatal period, unspecified

        2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code Code on Newborn Record
      • toxoplasmosis P37.1 (acute) (subacute) (chronic)
  • Lymphadenopathy (generalized) R59.1
    ICD-10-CM Diagnosis Code R59.1

    Generalized enlarged lymph nodes

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    Applicable To
    • Lymphadenopathy NOS
    • due to toxoplasmosis (acquired) B58.89
      ICD-10-CM Diagnosis Code B58.89

      Toxoplasmosis with other organ involvement

        2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
      • congenital P37.1 (acute) (subacute) (chronic)
  • Meningoencephalitis G04.90
    - see also Encephalitis
    ICD-10-CM Diagnosis Code G04.90

    Encephalitis and encephalomyelitis, unspecified

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    Applicable To
    • Ventriculitis (cerebral) NOS
    • in (due to)
      • toxoplasmosis (acquired) B58.2
        ICD-10-CM Diagnosis Code B58.2

        Toxoplasma meningoencephalitis

          2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
        • congenital P37.1
  • Meningoencephalomyelitis - see also Meningoencephalitis
  • Microcephalus, microcephalic, microcephaly Q02
    ICD-10-CM Diagnosis Code Q02

    Microcephaly

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code POA Exempt
    Code First
    • , if applicable, congenital Zika virus disease
    Includes
    • hydromicrocephaly
    • micrencephalon
    Type 1 Excludes
    • Meckel-Gruber syndrome (Q61.9)
    • due to toxoplasmosis P37.1 (congenital)
  • Microphthalmos, microphthalmia (congenital) Q11.2
    ICD-10-CM Diagnosis Code Q11.2

    Microphthalmos

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code POA Exempt
    Applicable To
    • Cryptophthalmos NOS
    • Dysplasia of eye
    • Hypoplasia of eye
    • Rudimentary eye
    Type 1 Excludes
    • cryptophthalmos syndrome (Q87.0)
    • due to toxoplasmosis P37.1
  • Pneumonitis (acute) (primary) - see also Pneumonia
    • due to
      • toxoplasmosis (acquired) B58.3
        ICD-10-CM Diagnosis Code B58.3

        Pulmonary toxoplasmosis

          2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
        • congenital P37.1
  • Toxoplasma, toxoplasmosis (acquired) B58.9
    ICD-10-CM Diagnosis Code B58.9

    Toxoplasmosis, unspecified

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    • congenital P37.1 (acute) (subacute) (chronic)
    • maternal, manifest toxoplasmosis in infant P37.1 (acute) (subacute) (chronic)
  • Uveitis (anterior) - see also Iridocyclitis
    • due to toxoplasmosis (acquired) B58.09
      ICD-10-CM Diagnosis Code B58.09

      Other toxoplasma oculopathy

        2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
      Applicable To
      • Toxoplasma uveitis
      • congenital P37.1

ICD-10-CM Codes Adjacent To P37.1
P36.2 Sepsis of newborn due to Staphylococcus aureus
P36.3 Sepsis of newborn due to other and unspecified staphylococci
P36.30 Sepsis of newborn due to unspecified staphylococci
P36.39 Sepsis of newborn due to other staphylococci
P36.4 Sepsis of newborn due to Escherichia coli
P36.5 Sepsis of newborn due to anaerobes
P36.8 Other bacterial sepsis of newborn
P36.9 Bacterial sepsis of newborn, unspecified
P37 Other congenital infectious and parasitic diseases
P37.0 Congenital tuberculosis
P37.1 Congenital toxoplasmosis
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
P38 Omphalitis of newborn
P38.1 Omphalitis with mild hemorrhage
P38.9 Omphalitis without hemorrhage
P39 Other infections specific to the perinatal period

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.