Dr John Peter Gruen, MD - Medicare Neurological Surgery in Los Angeles, CA

Dr John Peter Gruen, MD is a medicare enrolled "Neurological Surgery" physician in Los Angeles, California. His current practice location is 1520 San Pablo St, Ste 3800, Los Angeles, California. You can reach out to his office (for appointments etc.) via phone at (323) 442-5720.

Dr John Peter Gruen is licensed to practice in California (license number G63324) and he also participates in the medicare program. He does not accept medicare assignments directly but he may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. His NPI Number is 1194769570.

Contact Information

Dr John Peter Gruen, MD
1520 San Pablo St, Ste 3800,
Los Angeles, CA 90033-5310
(323) 442-5720
(323) 442-7543



Physician's Profile

Full NameDr John Peter Gruen
GenderMale
SpecialityNeurological Surgery
Location1520 San Pablo St, Los Angeles, California
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1194769570
  • Provider Enumeration Date: 06/15/2006
  • Last Update Date: 11/27/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 1153472014
  • Enrollment ID: I20090706000612

Medical Identifiers

Medical identifiers for Dr John Peter Gruen such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1194769570NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207T00000XNeurological Surgery G63324 (California)Primary

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Dr John Peter Gruen allows following entities to bill medicare on his behalf.
Entity NameUsc Care Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1902846306
PECOS PAC ID: 0446157747
Enrollment ID: O20050512000412

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Research roundup: Surgical residents not happy with new schedules; ICU admissions rise sharply; Lessons from Mich. for coverage enrollment

In 2011, the organization that oversees medical student training instituted a new regimen to replace the traditional 24-hour call schedule for medical residents, to improve patient safety and the residents' health. Under this new policy, residents in their first year of post-graduate training get increased supervision and are limited to 16-hour shifts.

Antimicrobial therapy can prevent occurrence of pneumococcal septicemia

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› Verified 2 days ago

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Dr John Peter Gruen is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Dr John Peter Gruen, MD
Po Box 31309,
Los Angeles, CA 90031-0309

Ph: (323) 442-5720
Dr John Peter Gruen, MD
1520 San Pablo St, Ste 3800,
Los Angeles, CA 90033-5310

Ph: (323) 442-5720

News Archive

NIH-funded study examines most effective treatment option for pregnancy of unknown location

Preemptive treatment for a nonviable pregnancy of unknown location—a situation in which there is a positive pregnancy test result but the location of the pregnancy cannot be confirmed within or outside the uterus with other diagnostic tests—resolves the condition more rapidly than treating symptoms as they arise, suggests a study supported by the National Institutes of Health.

Scientists reveal underlying mechanism for formation and growth of epithelial tubes

A team of scientists from Singapore and France has revealed the underlying mechanism for the formation and growth of a fundamental type of tissue - epithelial tubes. Defects in the architecture of epithelial tubes lead to diseases such as cholestasis, atherosclerosis and polycystic kidney disease.

Actavis' subsidiary files lawsuit against FDA over Celebrex decision

Actavis plc today announced that its subsidiary, Watson Laboratories, Inc., has filed suit against the U.S. Food and Drug Administration challenging the Agency's decision regarding its entitlement to shared 180-day marketing exclusivity for its generic version of Celebrex (celecoxib) 50 mg, 100 mg, 200 mg and 400 mg capsules.

Research roundup: Surgical residents not happy with new schedules; ICU admissions rise sharply; Lessons from Mich. for coverage enrollment

In 2011, the organization that oversees medical student training instituted a new regimen to replace the traditional 24-hour call schedule for medical residents, to improve patient safety and the residents' health. Under this new policy, residents in their first year of post-graduate training get increased supervision and are limited to 16-hour shifts.

Antimicrobial therapy can prevent occurrence of pneumococcal septicemia

Antimicrobial therapy targeting specific cells in the immune system could prevent sepsis and life-threatening disease in people suffering from pneumonia, new research led by the University of Leicester has shown.

Read more News

› Verified 2 days ago


Neurological Surgery Doctors in Los Angeles, CA

Dr. Eisha Anne Christian, MD
Neurological Surgery
Medicare: Medicare Enrolled
Practice Location: 1200 N State St, Suite 3300, Los Angeles, CA 90089
Phone: 323-226-7421    Fax: 323-226-7833
Ben Strickland, MD
Neurological Surgery
Medicare: Medicare Enrolled
Practice Location: 1200 N State Street, Suite 3300, Los Angeles, CA 90033
Phone: 803-312-4871    Fax: 323-226-7421
Dr. Tiffany Grace Perry, M.D.
Neurological Surgery
Medicare: Accepting Medicare Assignments
Practice Location: 127 S San Vicente Blvd Ste A6600, Los Angeles, CA 90048
Phone: 310-423-7900    Fax: 310-423-9124
Dr. Julian Antony Mattiello, M.D., PH.D.
Neurological Surgery
Medicare: Not Enrolled in Medicare
Practice Location: 8635 W 3rd St, Suite 1080 West, Los Angeles, CA 90048
Phone: 310-423-9900    
Dr. Vivek Mehta, MD
Neurological Surgery
Medicare: Accepting Medicare Assignments
Practice Location: 1200 N State St, Suite 3300, Los Angeles, CA 90033
Phone: 323-226-7421    
Amit Rajiv Chaudhari, MD PHD
Neurological Surgery
Medicare: Accepting Medicare Assignments
Practice Location: 757 Westwood Plz Ste 6263, Los Angeles, CA 90095
Phone: 310-267-9448    
Dr. John Yu, M.D.
Neurological Surgery
Medicare: Accepting Medicare Assignments
Practice Location: 8700 Beverly Blvd., Los Angeles, CA 90048
Phone: 310-423-7900    Fax: 310-423-0777

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