Family Practitioner, Primary Care Doctor, Psychiatrist
11 years of experience
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).

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Specialties & Research

Dr. Samuel Preston, DO is board certified in Family Medicine and 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. Preston graduated from Lake Erie College of Osteopathic Medicine at Erie.


Dr. Preston has 4 hospital affiliations:

  • Walter Reed Army Medical Center 
  • Nnmc 

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Additional Information
Dr. Samuel L Preston DO is a male Family Practitioner, has 11 years of experience and practices in Family Medicine and Psychiatry.
Where does Dr. Samuel L. Preston practice?
Dr. Samuel Preston has 1 office location.
Dr. Samuel Preston practices Family Medicine and Psychiatry near Washington, DC.
See Washington Family Physicians and Washington Psychiatrists.