Mareen Greenway, MD - Medicare Family Medicine in Irvine, CA

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Mareen Greenway, MD is a medicare enrolled "Family Medicine" physician in Irvine, California. Her current practice location is 4 Park Plz Ste 2050, Irvine, California. You can reach out to her office (for appointments etc.) via phone at (949) 503-5111.

Mareen Greenway is licensed to practice in California (license number 152024) and she also participates in the medicare program. She does not accept medicare assignments directly but she may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. Her NPI Number is 1619388972.

Contact Information

Mareen Greenway, MD
4 Park Plz Ste 2050,
Irvine, CA 92614-8603
(949) 503-5111
Not Available

Map and Direction




Physician's Profile

Full NameMareen Greenway
GenderFemale
SpecialityFamily Medicine
Location4 Park Plz Ste 2050, Irvine, California
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1619388972
  • Provider Enumeration Date: 05/08/2014
  • Last Update Date: 07/08/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 4082904719
  • Enrollment ID: I20190407000007

Medical Identifiers

Medical identifiers for Mareen Greenway such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1619388972NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207Q00000XFamily Medicine A152024 (California)Secondary
207Q00000XFamily Medicine 152024 (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. Mareen Greenway allows following entities to bill medicare on her behalf.
Entity NameComprehensive Primary Care Medical Associates, Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1982786620
PECOS PAC ID: 5092780833
Enrollment ID: O20040826000639

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. Mareen Greenway 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
Mareen Greenway, MD
4 Park Plz Ste 2050,
Irvine, CA 92614-8603

Ph: (949) 503-5111		Mareen Greenway, MD
4 Park Plz Ste 2050,
Irvine, CA 92614-8603

Ph: (949) 503-5111

Reviews and Comments


Family Medicine Doctors in Irvine, CA

Dr. Jun Ho Chae, M.D.
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Phone: 949-262-5755    Fax: 949-262-5774
Mary Beth L Sinchai, M.D.
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Dr. Jennifer Rhee, DO
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Phone: 949-551-1090    Fax: 949-262-5500
Rachel Kim Lu, FNP-C
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Phone: 949-552-8282    
Dr. John H Stasiewicz, MD
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Phone: 949-551-1090    Fax: 949-262-5500
Dr. Nazita Adili-khams, M.D.
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Medicare: Accepting Medicare Assignments
Practice Location: 2500 Alton Parkway, Ste 101, Irvine, CA 92606
Phone: 949-222-2722    Fax: 949-222-9969

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.