A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).
Learn more about Dr. Joan O'Brien:
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The overall average patient rating of Dr. Joan O'Brien is Excellent.
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Specialties & Research
Dr. Joan O'Brien, MD is board certified in Ophthalmology.
- She has special expertise in 11 areas:
- Eye Cancer
- Eye Cancer (Choroid Neoplasm)
- Eye Cancer (Retinal Neoplasm)
- Eye Cancer (Uveal Neoplasm)
- Eye Diseases
- Orbital Cancer
- Orbital Diseases
- Retinal Disorders
- Vision Disorders
Education & Awards
Dr. O'Brien graduated from Dartmouth College, Hanover. She has 6 awards.
Dr. O'Brien has 6 hospital affiliations:
- UCSF Medical Center / Moffitt-Long Hospitals
- Pennsylvania Hospital University PA Health System
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- Additional Information
- Dr. Joan Marie O'Brien MD is a female Ophthalmologist, has 25 years of experience and practices in Ophthalmology.
- Where does Dr. Joan M. O'Brien practice?
- Dr. Joan O'Brien has 3 office locations.
Dr. Joan O'Brien practices Ophthalmology near Philadelphia, PA.
Additional practice locations include: San Francisco, CA.
See Philadelphia Ophthalmologists.