Directory of Physicians (MD/DO)
- Omid Rowshan, MD
- Omiel Powell, MD
- Omkar Parthab, MD
- Omobolawa Kukoyi, MD
- Omolara Oyedele, MD
- Omotola Jaiyebo, MD
- Omoyemi Adebayo, MD
- Omoyeni Clement, MD
- Omran Gdara, MD
- Onna Jernigan, MD
- Onyekachi Otugo, MD
- Onyi Mmagu, MD
- ​Onyinyechi Eke, MD
- Ooha Kambhampati, MD
- Opal Taylor, MD
- Opeolu Adeoye, MD
- Ophelia Sanders, MD
- Orel Swenson, MD
- Oren Hirsch, MD
- Oren Mechanic, MD
- Oreoluwa Ogunji, MD
- Orest Dombchewsky, MD
- Orest Rywak, MD
- Oreste Bruni, MD
- Oretunlewa Soyinka, MD
- Orhay Mirzapolos, MD
- Oriane Longerstaey, MD
- Orietta Girard, MD
- Orin Eddy, MD
- Orion Colfer, MD
- Orit Gal, MD
- Orland Donald, MD
- Orlando Adamson, MD
- Orlando Cortez, MD
- Orlando Gutierrez, MD
- Orlando Magallanes, MD
- Orlee Panitch, MD
- Orn-Usa Boonprakong, MD
- Oron Frenkel, MD
- Oronde Smith, MD
- Orrin Ahola, MD
- Ory Barak, MD
- Orzie Henderson, MD
- Osama Aaflaq, MD
- Osama Antar, MD
- Osama Eisa, MD
- Osama Fashho, MD
- Osama Khattab, MD
- Osama Sheth, MD
- Osborne MacGuire, MD