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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).

> > > > Dr. John Walker, MD

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Additional Information
Dr. John A P Walker MD is a male Internist, has 40 years of experience and practices in Internal Medicine.
Where does Dr. John A. Walker practice?
Dr. John Walker has 1 office location.
Dr. John Walker practices Internal Medicine near Modesto, CA.
See Modesto Internists.