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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The overall average patient rating of Dr. John Gruen is Average.
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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)
- 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:
- Huntington Hospital
- Los Angeles County + University of Southern California Medical Center
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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 1 office location.
Dr. John Gruen practices Neurological Surgery near Los Angeles, CA.
See Los Angeles Surgeons.