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ICD-10 Guide
ICD-10 CodesA50.43

A50.43

Billable

Late congenital syphilitic polyneuropathy

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/05/2025

Code Description

ICD-10 A50.43 is a billable code used to indicate a diagnosis of late congenital syphilitic polyneuropathy.

Key Diagnostic Point:

Late congenital syphilitic polyneuropathy is a neurological condition resulting from congenital syphilis, which is caused by the bacterium Treponema pallidum. This condition typically manifests in infants born to mothers who were infected with syphilis during pregnancy. The polyneuropathy can present with a range of symptoms including weakness, sensory deficits, and motor dysfunction due to damage to peripheral nerves. The onset of symptoms may vary, but they often appear in the first few months of life. Diagnosis is made through clinical evaluation, serological testing for syphilis, and neurological examination. Treatment involves the administration of antibiotics, primarily penicillin, which is effective in treating the underlying syphilis infection. Early intervention is crucial to mitigate long-term neurological damage. The condition underscores the importance of prenatal screening for syphilis and the need for timely treatment to prevent congenital transmission.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Requires understanding of congenital syphilis and its complications.
  • Differentiation from other types of neuropathy.
  • Need for accurate maternal history and serological testing.
  • Potential for co-morbid conditions complicating diagnosis.

Audit Risk Factors

  • Inadequate documentation of maternal syphilis status.
  • Failure to document neurological symptoms clearly.
  • Misclassification of the type of neuropathy.
  • Lack of supporting serological test results.

Specialty Focus

Medical Specialties

Pediatrics

Documentation Requirements

Detailed history of maternal health, prenatal care, and infant neurological assessments.

Common Clinical Scenarios

Infants presenting with developmental delays or neurological deficits.

Billing Considerations

Need for follow-up assessments to monitor neurological development.

Infectious Disease

Documentation Requirements

Comprehensive documentation of syphilis screening and treatment protocols.

Common Clinical Scenarios

Management of congenital syphilis cases and their complications.

Billing Considerations

Understanding of syphilis transmission and prevention strategies.

Coding Guidelines

Inclusion Criteria

Use A50.43 When
  • Follow ICD
  • CM guidelines for coding congenital syphilis and associated complications
  • Ensure accurate documentation of maternal syphilis status and infant neurological assessments

Exclusion Criteria

Do NOT use A50.43 When
  • Exclude other causes of polyneuropathy

Related ICD-10 Codes

Related CPT Codes

86592CPT Code

Syphilis serology test

Clinical Scenario

Used to confirm syphilis infection in pregnant women and newborns.

Documentation Requirements

Document the reason for testing and results.

Specialty Considerations

Infectious disease specialists should ensure comprehensive testing protocols.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of congenital syphilis and its complications, improving data accuracy and facilitating better patient management.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of congenital syphilis and its complications, improving data accuracy and facilitating better patient management.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of congenital syphilis and its complications, improving data accuracy and facilitating better patient management.

Resources

Clinical References

  • •
    CDC Syphilis Screening Guidelines

Coding & Billing References

  • •
    CDC Syphilis Screening Guidelines

Frequently Asked Questions

What is the significance of coding A50.43 accurately?

Accurate coding of A50.43 is crucial for appropriate treatment planning, resource allocation, and tracking of congenital syphilis cases, which can significantly impact public health initiatives.