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Neurological Surgeon, Surgical Specialist
25 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).

Patient Reviews

Patient comments (2)

The overall average patient rating of Dr. John Gruen is Average. Dr. Gruen has been reviewed by 5 patients who have provided 2 comments. The rating is 3 out of 5 stars.

Patient Ratings
Ease of Appointment 1.9
Promptness 3.0
Courteous Staff 3.0
Accurate Diagnosis 1.9
Bedside Manner 2.3
Spends Time with Me 2.8
Follows Up After Visit 2.3

Specialties & Research

Dr. John Gruen, MD is board certified in Neurological Surgery.

  • He has special expertise in 7 areas:
  • Carpal Tunnel Syndrome
  • Head Trauma (Craniocerebral Trauma)
  • Hydrocephalus
  • Neurosurgery
  • Normal Pressure Hydrocephalus
  • Peripheral Nervous System Diseases
  • Wounds and Injuries

Education & Awards

Dr. Gruen graduated from Columbia University, New York.


Dr. Gruen has 6 hospital affiliations:

  • USC University Hospital 
  • Huntington Hospital 


  • English
  • Chinese
  • Taiwanese
  • Spanish
  • Mandarin
  • French

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Additional Information
Dr. John Peter Gruen MD is a male Neurosurgeon, has 25 years of experience and practices in Neurological Surgery.
Where does Dr. John P. Gruen practice?
Dr. John Gruen has 2 office locations.
Dr. John Gruen practices Neurological Surgery near Los Angeles, CA.
See Los Angeles Neurological Surgeons.