What is the ICD-10 (International Classification of Diseases, 10th Revision) code for a history of syphilis?

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Last updated: June 23, 2025View editorial policy

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From the Research

The ICD-10 code for a history of syphilis is Z86.19, which falls under "Personal history of other infectious and parasitic diseases." This code should be used when documenting a patient who has previously been treated for syphilis but no longer has an active infection. It's essential to note that this code is only appropriate for patients with a resolved infection; if the patient has current syphilis, you would instead use codes from the A50-A53 range depending on the type and stage of active infection. When using Z86.19, you should document details about when the infection occurred, what treatment was provided, and confirmation that the infection has been resolved. This historical information is clinically relevant as it may influence future medical decisions, risk assessments, and preventive care recommendations. Proper coding of a history of syphilis ensures accurate medical records and appropriate healthcare planning for the patient.

Some key points to consider when coding for a history of syphilis include:

  • The patient's infection status: Z86.19 is only used for patients with a resolved infection.
  • The type and stage of infection: If the patient has current syphilis, use codes from the A50-A53 range.
  • Treatment and resolution: Document the treatment provided and confirmation that the infection has been resolved.
  • Clinical relevance: A history of syphilis can influence future medical decisions, risk assessments, and preventive care recommendations.

According to the most recent and highest quality study available 1, the mainstay of syphilis treatment is parenteral penicillin G, despite the relatively modest clinical trial data that support its use. However, this study does not provide information on ICD-10 coding for a history of syphilis. The ICD-10 code Z86.19 is widely accepted and used in clinical practice to document a patient's history of syphilis.

In terms of morbidity, mortality, and quality of life, accurate coding of a history of syphilis is crucial for ensuring appropriate healthcare planning and preventive care recommendations. A history of syphilis can increase the risk of certain complications, such as cardiovascular disease and neurosyphilis, and can also impact treatment decisions for other conditions. Therefore, it is essential to document a patient's history of syphilis accurately and consistently using the ICD-10 code Z86.19.

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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