P37.1 – Congenital toxoplasmosis
ICD-10-CM 2027 diagnosis code · Infections specific to the perinatal period
ICD-10-CM code
P37.1
- Code
P37.1(claims format:P371)- Description
- Congenital toxoplasmosis
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 16. Certain conditions originating in the perinatal period (P00-P96)
- Block
- P35-P39 Infections specific to the perinatal period
- Parent codes
- P37
Notes for P37.1
Applicable to:
- Hydrocephalus due to congenital toxoplasmosis
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
P37 – Other congenital infectious and parasitic diseases
Excludes2 (not included here):
Block P35-P39
Applicable to:
- Infections acquired in utero, during birth via the umbilicus, or during the first 28 days after birth
Excludes2 (not included here):
- 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)
Index terms for P37.1
Entries in the ICD-10-CM alphabetic index that lead to this code:
- Hydrocephalus, due to toxoplasmosis
- Toxoplasma, toxoplasmosis, congenital
- Hepatitis, in, toxoplasmosis, congenital
- Uveitis, due to toxoplasmosis, congenital
- Encephalitis, in, toxoplasmosis, congenital
- Chorioretinitis, in, toxoplasmosis, congenital
- Pneumonitis, due to, toxoplasmosis, congenital
- Lymphadenopathy, due to toxoplasmosis, congenital
- Meningoencephalitis, in, toxoplasmosis, congenital
- Microphthalmos, microphthalmia, due to toxoplasmosis
- Infection, infected, infective, congenital, toxoplasmosis
- Microcephalus, microcephalic, microcephaly, due to toxoplasmosis
- Toxoplasma, toxoplasmosis, maternal, manifest toxoplasmosis in infant
- Meningoencephalomyelitis, due to, Toxoplasma or toxoplasmosis, congenital
Related codes in P37
- P37.0 – Congenital tuberculosisBillable
- P37.2 – Neonatal (disseminated) listeriosisBillable
- P37.3 – Congenital falciparum malariaBillable
- P37.4 – Other congenital malariaBillable
- P37.5 – Neonatal candidiasisBillable
- P37.8 – Other specified congenital infectious and parasitic diseasesBillable
- P37.9 – Congenital infectious or parasitic disease, unspecifiedBillable
Frequently asked questions
What is ICD-10 code P37.1?
P37.1 is the ICD-10-CM code for congenital toxoplasmosis, in the block P35-P39 (Infections specific to the perinatal period).
Is P37.1 a billable code?
Yes. P37.1 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does P37.1 belong to?
It belongs to category P37 – Other congenital infectious and parasitic diseases.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.