Dr. John P. Gruen
- Gender: Male
- Experience: 35 years
- Sole propriator: No
- NPI: 1194769570
Dr. John P. Gruen M.D.
Neurosurgeon
He is located at 1520 San Pablo Street Ste 3800 in Los Angeles, CA 90033. Can help patients with the following: Acoustic Neuroma, Appendicitis, Brain Damage, Brain Hemorrhage, Traumatic Brain Injury, Ulcerative Colitis. His National Provider Identifier (NPI) number is 1194769570. Appointment can be made via the phone number (323) 442-5720. He is affiliated with 3 practices.
Conditions treated
Dr. John Peter Gruen, being an neurosurgeon, treats the following conditions. Please be advised that this list may not be complete. For the full list of conditions treated, consult directly with Dr. John P. Gruen.
- Achalasia
- Acoustic Neuroma
- Anal Fissure
- Appendicitis
- Boils
- Brain Aneurysm
- Brain Cancer
- Brain Damage
- Brain Hemorrhage
- Brain Lesions
- Cancer
- Cauda Equina Syndrome
- Cerebral Aneurysm
- Cervical Radiculopathy
- Colon Cancer
- Concussion
- Crohn's Disease
- Cyst
- Diverticulosis
- Enlarged Spleen
- Esophageal Cancer
- Gallstones
- Gangrene
- Heart Disease
- Hemorrhoids
- Hernia
- Herniated Disc
- Hydrocephalus
- Inflammatory Bowel Disease (IBD)
- Lymphedema
- Neck Pain
- Pancreatitis
- Paralysis
- Peptic Ulcer
- Peripheral Nerve Tumors
- Pilonidal Cyst
- Pinched Nerve
- Pseudotumor Cerebri
- Quadriplegia
- Sebaceous Cyst
- Spinal Cord Injury
- Spinal Stenosis
- Spondylosis
- Traumatic Brain Injury
- Ulcerative Colitis
Medicare Enrollment
Dr. John P. Gruen is enrolled to bill Medicare as a Practitioner - Neurosurgery .
Bills through: Usc Care Medical Group Inc
Based on Medicare's public enrollment records as of Jul 17, 2026. This reflects Medicare fee-for-service enrollment only and is not a comment on insurance accepted, quality, outcomes, or board certification.
Payments received
Drug payment
| Stryker | $213 |
| Sigma-Tau Pharmaceuticals | $24 |
| Osteomed | $21 |
Other
| Food and Beverage | $296 |
Additional Specialities
- Surgeon
Affiliated practices
Looking for more Neurosurgeons?
Out of the 36 neurosurgeons in this region, here are 10 randomly selected ones for you to explore.
- Gender: Male
- Address: Suite 3800 1520 San Pablo Street Los Angeles, 90033, CA
- Gender: Male
- Address: Suite 2000 1520 San Pablo Street Los Angeles, 90033, CA
- Gender: Male
- Address: 111 Colchester Avenue Burlington, 5401, VT
- Gender: Male
- Address: 4500 San Pablo Road South Jacksonville, 32224, FL
- Gender: Male
- Address: Suite 3300 1200 North State Street Los Angeles, 90033, CA
- Gender: Male
- Address: Suite 3800 1520 San Pablo Street Los Angeles, 90033, CA
- Gender: Male
- Address: 8635 West 3rd Street Suite 770W Los Angeles, 90048, CA
- Gender: Male
- Address: 1500 East Chevy Chase Drive Suite 204 Glendale, 91206, CA
- Gender: Male
- Address: Suite 3000 1520 San Pablo Street Los Angeles, 90033, CA
- Gender: Male
- Address: Suite 3800 1520 San Pablo Street Los Angeles, 90033, CA
Questions & Answers
Does Dr. John Peter Gruen have affiliation with practices?
Dr. John Peter Gruen is affiliated with Keck USC Health Center. For the full list of practices see this list.
Does Dr. John Peter Gruen accept insurance?
Unfortunately we don't have any information if Dr. John Peter Gruen accepts insurance.
Where can you meet with Dr. John Peter Gruen?
Dr. John Peter Gruen's office is located at 1520 San Pablo Street Ste 3800 in Los Angeles, CA 90033.
What conditions does Dr. John Peter Gruen treat?
Dr. John Peter Gruen provides treatment for Acoustic Neuroma, Appendicitis, Brain Damage, Brain Hemorrhage, Traumatic Brain Injury, Ulcerative Colitis. For the full list see this list.