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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. Timothy Sullivan:

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Patient Reviews

Patient comments (0)

The overall average patient rating of Dr. Timothy Sullivan is Excellent. Dr. Sullivan has been reviewed by 2 patients who have provided 0 comments. The rating is 5 out of 5 stars.

Specialties & Research

Dr. Timothy Sullivan, MD is board certified in Internal Medicine and Psychiatry.

  • He has special expertise in 8 areas:
  • Attention Deficit Disorder (ADD) / Attention Deficit Hyperactivity Disorder (ADHD)
  • Bipolar Disorder / Manic Depressive Disorder
  • Depression
  • Depressive Disorder
  • Insomnia
  • Psychotherapy
  • Schizophrenia
  • Sleep Disorders

Education & Awards

Dr. Sullivan graduated from Dartmouth College, Hanover.


Dr. Sullivan has 4 hospital affiliations:

  • Staten Island University Hospital North 
  • Staten Island University South 


  • English
  • Spanish
  • Italian

> > > > Dr. Timothy Sullivan, MD

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Additional Information
Dr. Timothy Bernard Sullivan MD is a male Internist, has 34 years of experience and practices in Internal Medicine and Psychiatry.
Where does Dr. Timothy B. Sullivan practice?
Dr. Timothy Sullivan has 1 office location.
Dr. Timothy Sullivan practices Internal Medicine and Psychiatry near Staten Island, NY.
See Staten Island Internists and Staten Island Psychiatrists.