| Abbreviation | Definition |
|---|---|
| OHI | Oracle Health Insurance |
| OHIC | Ohio Hospital Insurance Company |
| OHIP | Ontario Health Insurance Plan |
| OHIP | Ontario Health Insurance Program |
| OHIP | Ovincial Health Insurance Plan |
| OHIPONTARIOHEALTHINSURANCEPLAN | Ontario Health Insurance Plan |
| OIAL | Oilfield Insurance Agencies Limited |
| OIBB | offshore insurance broking business |
| OIC | Office of the Insurance Commissioner |
| OIC | Oriental Insurance Company |
| OICE | Oracle Insurance Calculation Engine |
| OII | Ohio Insurance Institute |
| OII | Other Insurance Information |
| OIP | Outsource Insurance Professionals |
| OIR | Office of Insurance Regulation |
| OMBAS | Optimal Medical Benefit Administrative Services (medical insurance company; Unionville, Ontario, Can |
| OMI | Obligatory Medical Insurance |
| OMIG | Ohio Mutual Insurance Group |
| OMIP | Oregon Medical Insurance Pool |
| OOPM | Out Of Pocket Maximum |