P35-P39
Medium Complexity

Infections specific to the perinatal period

Primary Specialty: Neonatology
Last Updated: 2025-09-09

ICD-10 Codes (33)

30 billable
0 category headers
P36
Bacterial sepsis of newborn
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P36.0
Billable
Sepsis of newborn due to streptococcus, group B
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P36.1
Billable
Sepsis of newborn due to other and unspecified streptococci
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P36.10
Billable
Sepsis of newborn due to unspecified streptococci
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P36.19
Billable
Sepsis of newborn due to other streptococci
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P36.2
Billable
Sepsis of newborn due to Staphylococcus aureus
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P36.3
Billable
Sepsis of newborn due to other and unspecified staphylococci
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P36.30
Billable
Sepsis of newborn due to unspecified staphylococci
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P36.39
Billable
Sepsis of newborn due to other staphylococci
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P36.4
Billable
Sepsis of newborn due to Escherichia coli
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P36.5
Billable
Sepsis of newborn due to anaerobes
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P36.8
Billable
Other bacterial sepsis of newborn
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P36.9
Billable
Bacterial sepsis of newborn, unspecified
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P37
Other congenital infectious and parasitic diseases
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P37.0
Billable
Congenital tuberculosis
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P37.1
Billable
Congenital toxoplasmosis
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P37.2
Billable
Neonatal (disseminated) listeriosis
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P37.3
Billable
Congenital falciparum malaria
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P37.4
Billable
Other congenital malaria
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P37.5
Billable
Neonatal candidiasis
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P37.8
Billable
Other specified congenital infectious and parasitic diseases
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P37.9
Billable
Congenital infectious or parasitic disease, unspecified
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P38
Billable
Omphalitis of newborn
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P38.1
Billable
Omphalitis with mild hemorrhage
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P38.9
Billable
Omphalitis without hemorrhage
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P39
Other infections specific to the perinatal period
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P39.0
Billable
Neonatal infective mastitis
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P39.1
Billable
Neonatal conjunctivitis and dacryocystitis
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P39.2
Billable
Intra-amniotic infection affecting newborn, not elsewhere classified
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P39.3
Billable
Neonatal urinary tract infection
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P39.4
Billable
Neonatal skin infection
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P39.8
Billable
Other specified infections specific to the perinatal period
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P39.9
Billable
Infection specific to the perinatal period, unspecified
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Updates & Changes

FY 2026 Updates

Current Year

New Codes (1)

P04.49
Newborn affected by maternal use of other drugs of addiction

Revised Codes (1)

P04.17
Newborn affected by maternal use of cocaine - updated neonatal abstinence syndrome correlation

Deleted Codes

No codes deleted in this range for FY 2026

Historical Changes

  • FY 2025: Routine maintenance updates with minor terminology clarifications
  • FY 2024: Enhanced specificity requirements for certain code ranges
  • FY 2023: Updated documentation guidelines for improved clarity

Upcoming Changes

  • Proposed updates pending review by Coordination and Maintenance Committee
  • Under consideration: Enhanced digital health integration codes

Implementation Guidance

  • Review all FY 2026 updates for P35-P39 codes before implementation
  • Always verify the most current codes in the ICD-10-CM manual
  • Ensure clinical documentation supports the selected diagnosis codes
  • +3 more guidance items...

Range Overview

high priority

The ICD-10 code range P35-P39 pertains to infections specific to the perinatal period. These codes are used to document infections contracted by the newborn during the perinatal period, which is the period shortly before, during, and after birth. The codes in this range cover a variety of infections, including viral, bacterial, and fungal infections, and are crucial for accurate patient history, treatment, and statistical analysis.

Key Usage Points:

  • P35-P39 codes should be used for infections contracted during the perinatal period.
  • The codes cover a variety of infections, including viral, bacterial, and fungal.
  • These codes are essential for accurate patient history and treatment.
  • The codes in this range are also important for statistical analysis.
  • Always code to the highest level of specificity within this range.

Coding Guidelines

When to Use:

  • When a newborn contracts an infection during the perinatal period.
  • When documenting a patient's medical history.
  • When tracking the prevalence of certain infections in newborns.
  • When coding for statistical analysis or research purposes.
  • When coding for billing and reimbursement purposes.

When NOT to Use:

  • When the infection was not contracted during the perinatal period.
  • When the infection is not specific to the perinatal period.
  • When the infection is not confirmed by a physician.
  • When the infection is a symptom of another condition.

Code Exclusions

Always verify exclusions with the physician's documentation.

Documentation Requirements

Proper documentation for P35-P39 codes requires detailed and accurate clinical information. The documentation should clearly state the type of infection, when it was contracted, and any complications or associated conditions.

Clinical Information:

  • Type of infection
  • When the infection was contracted
  • Any complications or associated conditions
  • Confirmation of the infection by a physician
  • Treatment plan

Supporting Evidence:

  • Lab results confirming the infection
  • Physician's notes
  • Treatment records
  • Patient history
Good Documentation Example:

Newborn diagnosed with viral infection, confirmed by lab results, contracted during birth. Treatment plan includes antiviral medication.

Poor Documentation Example:

Newborn has infection.

Common Documentation Errors:

  • Not specifying when the infection was contracted
  • Not specifying the type of infection
  • Not including physician's confirmation
  • Not coding to the highest level of specificity

Range Statistics

5
Total Codes
30
Billable
Complexity:
Medium
Primary Use:Clinical Documentation
Chapter:16

Coding Complexity

Medium
Complexity Rating

The complexity of P35-P39 codes is medium due to the need to determine when the infection was contracted, identify the type of infection, code for any complications or associated conditions, and code to the highest level of specificity. Additionally, all information must be verified with the physician's documentation.

Key Factors:
  • Determining when the infection was contracted
  • Identifying the type of infection
  • Coding for complications or associated conditions
  • Coding to the highest level of specificity
  • Verifying the information with the physician's documentation

Specialty Focus

P35-P39 codes are primarily used in neonatology and pediatrics. They are crucial for documenting and treating infections in newborns, and for tracking the prevalence of these infections.

Primary Specialties:
Neonatology
60%
Pediatrics
40%
Clinical Scenarios:
  • Newborn diagnosed with bacterial infection contracted during birth.
  • Newborn with fungal infection contracted shortly after birth.
  • Newborn with viral infection contracted during the perinatal period.
  • Newborn with infection contracted during birth, with complications.

Resources & References

Resources for P35-P39 codes include the official ICD-10 coding guidelines, clinical reference sources, and educational materials.

Official Guidelines:

  • ICD-10-CM Official Guidelines for Coding and Reporting
  • World Health Organization's ICD-10 guidelines
  • Centers for Disease Control and Prevention's ICD-10 resources

Clinical References:

  • American Academy of Pediatrics' resources
  • ClinicalKey's neonatology resources

Educational Materials:

  • AAPC's ICD-10 training
  • AHIMA's ICD-10 resources

Frequently Asked Questions

Can P35-P39 codes be used for infections contracted after the perinatal period?

No, P35-P39 codes should only be used for infections contracted during the perinatal period.