ICD-10 Logo
ICDxICD-10 Medical Coding
ICD-10 Logo
ICDxICD-10 Medical Coding
ICD 10 CodesDiagnoses
ICD 10 CodesDiagnoses
ICD-10 Logo
ICDxICD-10 Medical Coding

Comprehensive ICD-10-CM code reference with AI-powered search capabilities.

© 2025 ICD Code Compass. All rights reserved.

Browse

  • All Chapters
  • All Categories
  • Diagnoses

Tools

  • AI Code Search
ICD-10-CM codes are maintained by the CDC and CMS. This tool is for reference purposes only.
v1.0.0
ICD-10 Guide
ICD-10 CodesP39.9

P39.9

Billable

Infection specific to the perinatal period, unspecified

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/11/2025

Code Description

ICD-10 P39.9 is a billable code used to indicate a diagnosis of infection specific to the perinatal period, unspecified.

Key Diagnostic Point:

Infections during the perinatal period can significantly impact neonatal health. This code is used when a newborn presents with an infection that is not specified, which may include a variety of infectious agents. Common infections in this category can include sepsis, pneumonia, and urinary tract infections (UTIs). UTIs in neonates are particularly concerning as they can lead to serious complications if not identified and treated promptly. Symptoms may be subtle, such as poor feeding, irritability, or temperature instability. Diagnosis typically involves urinalysis and culture, and treatment often requires antibiotics. The unspecified nature of this code indicates that while an infection is present, the specific pathogen or type of infection has not been determined, necessitating careful clinical evaluation and documentation to guide treatment and coding.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in clinical presentation of infections in neonates
  • Need for comprehensive diagnostic testing to identify specific infections
  • Potential overlap with other perinatal codes for infections
  • Documentation requirements for distinguishing between types of infections

Audit Risk Factors

  • Inadequate documentation of clinical findings
  • Failure to specify the type of infection when possible
  • Inconsistent coding practices among different providers
  • Lack of follow-up documentation on treatment outcomes

Specialty Focus

Medical Specialties

Neonatology

Documentation Requirements

Detailed clinical notes on symptoms, diagnostic tests, and treatment plans are essential. Documentation should include any laboratory results and the clinical rationale for the diagnosis.

Common Clinical Scenarios

Common scenarios include a neonate presenting with fever and lethargy, requiring evaluation for possible sepsis or UTI.

Billing Considerations

Neonatologists must be vigilant in documenting the clinical context, as infections can rapidly progress in neonates.

Pediatrics

Documentation Requirements

Pediatric documentation should include a thorough history and physical examination, with emphasis on any perinatal risk factors.

Common Clinical Scenarios

Pediatricians may encounter cases where a previously healthy neonate develops an infection after discharge, necessitating careful review of perinatal history.

Billing Considerations

Pediatricians should be aware of the potential long-term implications of perinatal infections on child development.

Coding Guidelines

Inclusion Criteria

Use P39.9 When
  • Coders should adhere to the official ICD
  • CM guidelines, ensuring that all documentation supports the diagnosis of an unspecified infection
  • It is important to use additional codes to specify any associated conditions or complications

Exclusion Criteria

Do NOT use P39.9 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

87070CPT Code

Culture, bacterial, any source, except urine

Clinical Scenario

Used when a culture is taken to identify the pathogen in a suspected infection.

Documentation Requirements

Document the clinical rationale for the culture and any preliminary findings.

Specialty Considerations

Neonatologists should ensure that cultures are obtained promptly in suspected cases of infection.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of infections, but the use of unspecified codes like P39.9 remains common. Coders must be diligent in documenting the clinical context to justify the use of this code.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of infections, but the use of unspecified codes like P39.9 remains common. Coders must be diligent in documenting the clinical context to justify the use of this code.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of infections, but the use of unspecified codes like P39.9 remains common. Coders must be diligent in documenting the clinical context to justify the use of this code.

Resources

Clinical References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Coding & Billing References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Frequently Asked Questions

When should P39.9 be used instead of a more specific infection code?

P39.9 should be used when a newborn presents with an infection that has not been specified after thorough evaluation. It is crucial to document all clinical findings and diagnostic efforts to support the use of this code.