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ICD-10 Coding for Syphilis(A50.0, A51.0, A51.5)

Complete ICD-10-CM coding and documentation guide for Syphilis. Includes clinical validation requirements, documentation requirements, and coding pitfalls.

Also known as:

LuesTreponema pallidum infection

Related ICD-10 Code Ranges

Complete code families applicable to Syphilis

A50-A53Primary Range

Syphilis and other venereal diseases

This range includes all stages of syphilis, from congenital to unspecified.

Code Comparison: When to Use Each Code

Compare key differences between these codes to ensure accurate selection

CodeDescriptionWhen to UseKey Documentation
A50.0Congenital syphilis, symptomaticUse for infants with symptomatic congenital syphilis.
  • Positive serological test in infant
  • Clinical signs of syphilis in newborn
A51.0Primary syphilis of genital organsUse for primary syphilis with genital ulcer.
  • Presence of painless ulcer
  • Positive treponemal and nontreponemal tests
A51.5Early syphilis, latentUse for asymptomatic syphilis with recent infection.
  • Positive serology <2 years post-infection
  • No symptoms

Clinical Decision Support

Always review the patient's clinical documentation thoroughly. When in doubt, choose the more specific code and ensure documentation supports it.

Key Information: ICD-10 code for primary syphilis

Essential facts and insights about Syphilis

The ICD-10 code for primary syphilis is A51.0, used for cases with genital ulcers and positive serological tests.

Primary ICD-10-CM Codes for syphilis

Congenital syphilis, symptomatic
Non-billable Code

Decision Criteria

clinical Criteria

  • Presence of symptoms in newborn

Applicable To

  • Congenital syphilis with symptoms

Excludes

  • Late congenital syphilis (A50.5)

Clinical Validation Requirements

  • Positive serological test in infant
  • Clinical signs of syphilis in newborn

Code-Specific Risks

  • Misclassification if symptoms are not documented

Coding Notes

  • Ensure documentation of symptoms in newborn.

Differential Codes

Alternative codes to consider when ruling out similar conditions to the primary diagnosis.

Late congenital syphilis

A50.5
Use A50.5 for late manifestations of congenital syphilis.

Secondary syphilis

A51.3
Secondary syphilis involves systemic symptoms.

Late latent syphilis

A52.9
Use A52.9 for infections >2 years.

Documentation & Coding Risks

Avoid these common documentation and coding issues when documenting Syphilis to ensure proper reimbursement, maintain compliance, and reduce audit risk. These guidelines are particularly important when using ICD-10 code A50.0.

Impact

Clinical: Leads to misdiagnosis or inappropriate treatment., Regulatory: Increases risk of non-compliance with coding standards., Financial: Potential for denied claims or reduced reimbursement.

Mitigation Strategy

Use specific clinical terms, Document test results

Impact

Reimbursement: May lead to lower reimbursement rates., Compliance: Increases risk of audit failures., Data Quality: Reduces accuracy of health records.

Mitigation Strategy

Document specific stage and symptoms to use the correct code.

Impact

Using A53.9 without specific documentation.

Mitigation Strategy

Ensure detailed documentation of symptoms and stage.

Documentation errors, coding pitfalls, and audit risks are interconnected aspects of medical coding and billing. Addressing all three areas helps ensure accurate coding, optimal reimbursement, and regulatory compliance.

Frequently Asked Questions

Common questions about ICD-10 coding for Syphilis, with expert answers to help guide accurate code selection and documentation.

Documentation Templates for Syphilis

Use these documentation templates to ensure complete and accurate documentation for Syphilis. These templates include all required elements for proper coding and billing.

Primary care visit for syphilis

Specialty: Primary Care

Required Elements

  • Patient history
  • Physical examination
  • Laboratory results
  • Treatment plan

Example Documentation

Patient presents with a painless ulcer. RPR is reactive. Plan: Benzathine penicillin G.

Examples: Poor vs. Good Documentation

Poor Documentation Example
Patient has syphilis.
Good Documentation Example
Patient presents with a 1-cm painless ulcer on the penile shaft. RPR is reactive at 1:32. Diagnosis: Primary syphilis (A51.0).
Explanation
The good example provides specific clinical findings and test results.

Need help with ICD-10 coding for Syphilis? Ask your questions below.

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