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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- Currently 2 of 4 stars
The overall average patient rating of Dr. John Gruen is Satisfactory.
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Specialties & Research
Dr. John Gruen, MD is board certified in Neurological Surgery.
He has special expertise in 3 Areas, including Neurosurgery, Peripheral Nervous System Diseases, and Wounds and Injuries.
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Education & Awards
Dr. Gruen graduated from Columbia University, New York.More Education & Awards
Dr. Gruen has 6 hospital affiliations:
- USC University Hospital
- Los Angeles County + University of Southern California Medical Center
Accepted Insurance Plans
Dr. Gruen accepts these health insurances in at least one office:
- United Healthcare - 16 plans
- Great-West Healthcare - 1 plan
- Unicare - 11 plans
- Anthem Blue Cross - 9 plans
- Blue Shield of California - 77 plans
- Humana - 6 plans
- Cigna - 4 plans
- CaIOPTIMA - 2 plans
- USA H & W Network - 1 plan
- Aetna - 2 plans
- LA Care Health Plan - 2 plans
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