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License & Identifications

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. William Callahan:

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  1. Qualifications
  2. What's important to you

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Patient Reviews

Patient comments (5)

The overall average patient rating of Dr. William Callahan is Below Average. Dr. Callahan has been reviewed by 6 patients who have provided 5 comments. The rating is 1.5 out of 5 stars.

Patient Ratings
Ease of Appointment 2.9
Promptness 2.9
Courteous Staff 2.9
Accurate Diagnosis 2.1
Bedside Manner 1.7
Spends Time with Me 2.3
Follows Up After Visit 2.1

Specialties & Research

Dr. William Callahan, MD is board certified in Psychiatry.

  • He has special expertise in 7 areas:
  • Attention Deficit Disorder (ADD) / Attention Deficit Hyperactivity Disorder (ADHD)
  • Bipolar Disorder / Manic Depressive Disorder
  • Depression
  • Depressive Disorder
  • Insomnia
  • Schizophrenia
  • Sleep Disorders

Education & Awards

Dr. Callahan graduated from Tufts University, Boston.

> > > > Dr. William Callahan, MD

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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.