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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 (13)

The overall average patient rating of Dr. Peter Grain is Below Average. Dr. Grain has been reviewed by 27 patients who have provided 13 comments. The rating is 2 out of 5 stars.

Patient Ratings
Ease of Appointment 3.4
Promptness 2.6
Courteous Staff 3.5
Accurate Diagnosis 2.3
Bedside Manner 2.2
Spends Time with Me 2.3
Follows Up After Visit 2.4

Specialties & Research

Dr. Peter Grain, MD is board certified in Neurological Surgery.

  • He has special expertise in 5 areas:
  • Cancer
  • Neurosurgery
  • Neurosurgical Procedures
  • Spinal Disorders
  • Wounds and Injuries

Education & Awards

Dr. Grain graduated from Stanford University.


Dr. Grain has 12 hospital affiliations:

  • St. Joseph Mercy Oakland 
  • Crittenton Hospital Medical Center 


  • English

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Additional Information
Dr. Peter G Grain MD is a male Neurosurgeon, has 30 years of experience and practices in Neurological Surgery.
Where does Dr. Peter G. Grain practice?
Dr. Peter Grain has 1 office location.
Dr. Peter Grain practices Neurological Surgery near Port Huron, MI.
See Port Huron Neurological Surgeons.