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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).

Patient Reviews

Patient comments (2)

The overall average patient rating of Dr. Gregory Mahr is Excellent. Dr. Mahr has been reviewed by 10 patients who have provided 2 comments. The rating is 5 out of 5 stars.

Patient Ratings
Ease of Appointment 4.2
Promptness 4.7
Courteous Staff 4.9
Accurate Diagnosis 4.7
Bedside Manner 4.9
Spends Time with Me 4.9
Follows Up After Visit 4.6

Specialties & Research

Dr. Gregory Mahr, 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. Mahr graduated from Wayne State University, Detroit.


Dr. Mahr has 4 hospital affiliations:

  • Oakwood Hospital and Medical Center 
  • Henry Ford Hospital 


  • Polish

> > > > Dr. Gregory Mahr, MD

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Additional Information
Dr. Gregory C Mahr MD is a male Psychiatrist, has 28 years of experience and practices in Psychiatry.
Where does Dr. Gregory C. Mahr practice?
Dr. Gregory Mahr has 3 office locations.
Dr. Gregory Mahr practices Psychiatry near Detroit, MI.
Additional practice locations include: Dearborn, MI.
See Detroit Psychiatrists.