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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).

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Additional Information
Dr. Kelly M O'Brien MD is a female Internist and practices in Internal Medicine.
Where does Dr. Kelly M. O'Brien practice?
Dr. Kelly O'Brien has 1 office location.
Dr. Kelly O'Brien practices Internal Medicine near Denver, CO.
See Denver Internists.