Gregory Marrujo, MD - Medicare Thoracic Surgery (Cardiothoracic Vascular Surgery) in Riverside, CA

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Gregory Marrujo, MD is a medicare enrolled "Thoracic Surgery (cardiothoracic Vascular Surgery)" physician in Riverside, California. His current practice location is 10800 Magnolia Ave, Riverside, California. You can reach out to his office (for appointments etc.) via phone at (909) 353-2000.

Gregory Marrujo is licensed to practice in California (license number G57292) 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 1013076686.

Contact Information

Gregory Marrujo, MD
10800 Magnolia Ave,
Riverside, CA 92505-3043
(909) 353-2000
Not Available

Map and Direction




Physician's Profile

Full NameGregory Marrujo
GenderMale
SpecialityThoracic Surgery (cardiothoracic Vascular Surgery)
Location10800 Magnolia Ave, Riverside, California
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1013076686
  • Provider Enumeration Date: 12/08/2006
  • Last Update Date: 11/30/2021
  Medicare PECOS Information:
  • PECOS PAC ID: 0648338111
  • Enrollment ID: I20081028000312

Medical Identifiers

Medical identifiers for Gregory Marrujo such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1013076686NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
208G00000XThoracic Surgery (cardiothoracic Vascular Surgery) G57292 (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. Gregory Marrujo allows following entities to bill medicare on his behalf.
Entity NameSouthern California Permanente Medical Group
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1770515280
PECOS PAC ID: 6002729175
Enrollment ID: O20031110000678
Entity NameSouthern California Permanente Medical Group
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1316979834
PECOS PAC ID: 6002729175
Enrollment ID: O20040126000823

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. Gregory Marrujo 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
Gregory Marrujo, MD
10800 Magnolia Ave,
Riverside, CA 92505-3043

Ph: (909) 353-2000		Gregory Marrujo, MD
10800 Magnolia Ave,
Riverside, CA 92505-3043

Ph: (909) 353-2000

Reviews and Comments


Thoracic Surgery (Cardiothoracic Vascular Surgery) Doctors in Riverside, CA


Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.