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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The overall average patient rating of Dr. William Callahan is Below Average.
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Specialties & Research
Dr. William Callahan, MD is board certified in Psychiatry.
Education & Awards
Dr. Callahan graduated from Tufts University, Boston.
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- Additional Information
- Dr. William Edward Callahan MD is a male Psychiatrist, has 25 years of experience and practices in Psychiatry.
- Where does Dr. William E. Callahan practice?
- Dr. William Callahan has 1 office location.
Dr. William Callahan practices Psychiatry near Aliso Viejo, CA.
See Aliso Viejo Psychiatrists.