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 CodesChapter 1: Certain infectious and parasitic diseasesA50

A50

Billable

Congenital syphilis

Chapter 1:Certain infectious and parasitic diseases

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

Code Description

ICD-10 A50 is a billable code used to indicate a diagnosis of congenital syphilis.

Key Diagnostic Point:

Congenital syphilis is a serious infection that occurs when a mother with syphilis transmits the bacterium Treponema pallidum to her fetus during pregnancy. This condition can lead to severe complications, including stillbirth, neonatal death, and a range of long-term health issues such as developmental delays, bone deformities, and neurological problems. The clinical presentation of congenital syphilis can vary widely, with some infants appearing healthy at birth while others may exhibit symptoms such as rash, fever, irritability, and jaundice. Diagnosis is typically made through serological testing of the infant and may include the use of non-treponemal tests (e.g., RPR, VDRL) and treponemal tests (e.g., FTA-ABS). Early detection and treatment are crucial to prevent severe outcomes, and the recommended treatment for infants diagnosed with congenital syphilis is penicillin. The condition underscores the importance of prenatal screening for syphilis and the need for effective contact tracing to identify and treat infected individuals to prevent transmission.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Requires understanding of maternal history and serological testing.
  • Differentiation from other congenital infections.
  • Need for accurate documentation of maternal syphilis status.
  • Potential for co-infection with other STIs.

Audit Risk Factors

  • Inadequate documentation of maternal syphilis status.
  • Failure to document serological test results.
  • Lack of clarity on the timing of treatment.
  • Inconsistent coding of related conditions.

Specialty Focus

Medical Specialties

Obstetrics/Gynecology

Documentation Requirements

Detailed maternal history, including syphilis screening results and treatment.

Common Clinical Scenarios

Prenatal visits with positive syphilis tests, management of syphilis in pregnancy.

Billing Considerations

Ensure accurate documentation of treatment administered to the mother and follow-up care for the infant.

Pediatrics

Documentation Requirements

Documentation of infant's clinical presentation, serological test results, and treatment administered.

Common Clinical Scenarios

Newborns presenting with signs of congenital syphilis, follow-up visits for developmental assessments.

Billing Considerations

Monitor for long-term complications and ensure appropriate referrals for developmental support.

Coding Guidelines

Inclusion Criteria

Use A50 When
  • According to the official coding guidelines, A50 should be used when there is clear documentation of congenital syphilis, supported by serological testing

Exclusion Criteria

Do NOT use A50 When
  • Exclusion criteria include cases where syphilis is not confirmed or where the infant has other congenital infections

Related CPT Codes

86592CPT Code

Syphilis serology test

Clinical Scenario

Used to confirm maternal syphilis status during pregnancy.

Documentation Requirements

Document the reason for testing and results.

Specialty Considerations

Obstetricians should ensure routine screening is performed.

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, improving the ability to track and manage cases effectively. It emphasizes the importance of maternal screening and treatment.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of congenital syphilis, improving the ability to track and manage cases effectively. It emphasizes the importance of maternal screening and treatment.

Reimbursement & Billing Impact

reimbursement and quality care tracking.

Resources

Clinical References

  • •
    CDC Congenital Syphilis Fact Sheet

Coding & Billing References

  • •
    CDC Congenital Syphilis Fact Sheet

Frequently Asked Questions

What is the primary cause of congenital syphilis?

Congenital syphilis is primarily caused by the transmission of the Treponema pallidum bacterium from an infected mother to her fetus during pregnancy.