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47 years of experience
Accepting new patients
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. Marc Horwitz, 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. Horwitz graduated from The Ohio State University , Columbus.


Dr. Horwitz has 6 hospital affiliations:

  • University Hospitals of Cleveland 
  • Euclid Hospital 

> > > > Dr. Marc Horwitz, MD

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Additional Information
Dr. Marc Jeffry Horwitz MD is a male Psychiatrist, has 47 years of experience and practices in Psychiatry.
Where does Dr. Marc J. Horwitz practice?
Dr. Marc Horwitz has 2 office locations.
Dr. Marc Horwitz practices Psychiatry near Cleveland, OH.
See Cleveland Psychiatrists.