Diagnostic code
099 — Sexually Transmitted Infections: Other (e.g., herpes genitalis, chlamydia, chancroid)
099 is an OHIP diagnostic code used on Ontario Health Insurance Plan claims. Sexually Transmitted Infections: Other (e.g., herpes genitalis, chlamydia, chancroid).
- Code
- 099
- Description
- Sexually Transmitted Infections: Other (e.g., herpes genitalis, chlamydia, chancroid)
Updated October 26, 2026
099 is the OHIP diagnostic code for sexually transmitted infections other than syphilis, gonorrhea and trichomoniasis, such as chlamydia and genital herpes.
Conditions billed under this code
- Chlamydia
- Genital herpes
- STI
What it covers
The Ministry lists 099 as 'Sexually Transmitted Infections: Other (e.g., herpes genitalis, chlamydia, chancroid)'. The wording was updated in March 2026, when the old code 100 'Venereal Diseases' was deleted (INFOBulletin 260314).
Use it for chlamydia, genital herpes, chancroid and other STIs the list doesn't name separately.
Close neighbours: 097 syphilis, 098 gonorrhea, 131 trichomoniasis, 078 warts including genital warts, 042 to 044 HIV, 070 viral hepatitis, 614 pelvic inflammatory disease, 616 vaginitis or cervicitis, 597 urethritis that isn't sexually transmitted.
Billing notes
- K028, STI or potential blood-borne pathogen management, is a time-based assessment and counselling service for a patient suspected of having an STI. Maximum 2 units per patient per physician per day and 4 per year; not payable with a consultation, assessment or visit by the same physician the same day (A52).
Related codes: 097, 098, 131, 078, 044, 614
Sources
- OHIP Diagnostic Codes (Ministry of Health, February 2026)
- INFOBulletin 260314: New diagnostic codes and updated descriptions (March 2026)
- Schedule of Benefits: Physician Services (effective July 1, 2026)
APEX flags claims whose diagnostic code does not fit the service billed before they come back rejected. See how APEX works · Pricing