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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).

Learn more about Dr. William Powell:

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Patient Reviews

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The overall average patient rating of Dr. William Powell is Excellent. Dr. Powell has been reviewed by 1 patients who have provided 0 comments. The rating is 5 out of 5 stars.

Specialties & Research

Dr. William Powell, 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. Powell graduated from Medical University of South Carolina, Charleston.


Dr. Powell has 3 hospital affiliations:

  • Spartanburg Hospital for Restorative Car 
  • Spartanburg Regional Medical Center 
  • Mental Health Center 


  • English

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Additional Information
Dr. William Sullivan Powell MD is a male Psychiatrist, has 46 years of experience and practices in Psychiatry.
Where does Dr. William S. Powell practice?
Dr. William Powell has 1 office location.
Dr. William Powell practices Psychiatry near Spartanburg, SC.
See Spartanburg Psychiatrists.