Phyllis Won, PA-C - Medicare Physician Assistant in San Rafael, CA

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Phyllis Won, PA-C is a medicare enrolled "Physician Assistant" in San Rafael, California. Her current practice location is 99 Montecillo Rd, San Rafael, California. You can reach out to her office (for appointments etc.) via phone at (415) 444-2000.

Phyllis Won is licensed to practice in California (license number PA62195) 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 1023788759.

Contact Information

Phyllis Won, PA-C
99 Montecillo Rd,
San Rafael, CA 94903-3308
(415) 444-2000
Not Available

Map and Direction




Provider's Profile

Full NamePhyllis Won
GenderFemale
SpecialityPhysician Assistant
Location99 Montecillo Rd, San Rafael, California
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1023788759
  • Provider Enumeration Date: 09/14/2021
  • Last Update Date: 05/02/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 3476912809
  • Enrollment ID: I20230703002777

Medical Identifiers

Medical identifiers for Phyllis Won such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1023788759NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
363A00000XPhysician Assistant PA62195 (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. Phyllis Won allows following entities to bill medicare on her behalf.
Entity NamePermanente Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1073606299
PECOS PAC ID: 8921910225
Enrollment ID: O20031104000710
Entity NameRegents of the University of California
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1760552343
PECOS PAC ID: 4284547274
Enrollment ID: O20031106000389
Entity NameUCSF Pediatrics Associates
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1376614016
PECOS PAC ID: 6204749112
Enrollment ID: O20031106000823
Entity NameUniversity of California San Francisco
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1861578973
PECOS PAC ID: 4486567229
Enrollment ID: O20031212000897
Entity NameUCSF Dept of Surgery
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1477627537
PECOS PAC ID: 7719886373
Enrollment ID: O20040102000839
Entity NameUCSF Medical Group Business Services
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1477624104
PECOS PAC ID: 3779497870
Enrollment ID: O20040622001513

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. Phyllis Won 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
Phyllis Won, PA-C
Po Box 20222,
American Canyon, CA 94503-0222

Ph: (707) 704-9757		Phyllis Won, PA-C
99 Montecillo Rd,
San Rafael, CA 94903-3308

Ph: (415) 444-2000

Reviews and Comments


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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.