Patient presents with signs and symptoms suggestive of syphilis.  Differential diagnosis includes primary syphilis, secondary syphilis, latent syphilis, and tertiary syphilis.  Patient history includes risk factors for sexually transmitted infections (STIs) such as unprotected sex.  Clinical findings may include chancre, rash, lymphadenopathy, condyloma lata, or neurological symptoms depending on the stage of infection.  RPR (rapid plasma reagin) and VDRL (venereal disease research laboratory) tests ordered for syphilis screening.  FTA-ABS (fluorescent treponemal antibody absorption) or TP-PA (Treponema pallidum particle agglutination assay) confirmatory testing will be performed if initial screening is positive.  Diagnosis of syphilis is based on serological testing and clinical presentation.  Current stage of syphilis determined based on symptoms, duration of infection, and laboratory results.  Treatment for syphilis typically involves intramuscular benzathine penicillin G, with dosage and duration determined by the stage of infection.  Patient education provided regarding safe sex practices, partner notification, and the importance of treatment adherence.  Follow-up appointments scheduled for monitoring treatment response and repeat serological testing.  ICD-10 code assigned based on the specific stage of syphilis (e.g., A51.0 for primary syphilis, A51.1 for secondary syphilis, A51.4 for latent syphilis, A52.9 for neurosyphilis).  CPT codes for laboratory testing and administration of medication documented for billing purposes.  Patient counseled on potential complications of untreated syphilis, including cardiovascular syphilis, neurosyphilis, and congenital syphilis.  Prevention strategies discussed, including condom use and regular STI screening.