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. Daniel O'Brien:
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The overall average patient rating of Dr. Daniel O'Brien is Excellent.
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Education & Awards
Dr. O'Brien graduated from Universite De Liege.
Dr. O'Brien has 8 hospital affiliations:
- Nashoba Valley Medical Center
- Marlborough Hospital
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- Additional Information
- Dr. Daniel J P O'Brien MD is a male Anesthesiologist, has 36 years of experience and practices in Anesthesiology.
- Where does Dr. Daniel J. O'Brien practice?
- Dr. Daniel O'Brien has 2 office locations.
Dr. Daniel O'Brien practices Anesthesiology near Worcester, MA.
Additional practice locations include: Fitchburg, MA.
See Worcester Anesthesiologists.