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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ADHD in Adults
Major Depressive Disorder
Specialties & Research
Dr. David Marcus, MD is board certified in Psychiatry.
- He has special expertise in 8 areas:
- Anxiety Disorders
- Attention Deficit Disorder (ADD) / Attention Deficit Hyperactivity Disorder (ADHD)
- Bipolar Disorder / Manic Depressive Disorder
- Depressive Disorder
- Sleep Disorders
Education & Awards
Dr. Marcus graduated from University of Kansas , Kansas City.
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- Additional Information
- Dr. David Loren Marcus MD is a male Psychiatrist, has 16 years of experience and practices in Psychiatry.
- Where does Dr. David L. Marcus practice?
- Dr. David Marcus has 2 office locations.
Dr. David Marcus practices Psychiatry near San Marino, CA.
Additional practice locations include: Costa Mesa, CA.
See San Marino Psychiatrists.