| OHI | Occupational Health Institute; operative hypertension indicator; oral hygiene index; Oral Hygiene In... |
|---|---|
| AID | 1) Artificial Insemination Donor 2) Donor Artificial Insemination |
| A&A | aid and attendance; awake and aware |
| ADC | adult day care [facility]; affective disorders clinic; Aid to [Families with] Dependent Children; AI... |
| AEGIS | Aid for the Elderly in Government Institutions |