William Robert Mathias, PA-C - Medicare Physician Assistant in San Marcos, CA

William Robert Mathias, PA-C is a medicare enrolled "Physician Assistant" in San Marcos, California. His current practice location is 150 Valpreda Rd, San Marcos, California. You can reach out to his office (for appointments etc.) via phone at (760) 736-6767.

William Robert Mathias is licensed to practice in California (license number 59627) 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 1285806323.

Contact Information

William Robert Mathias, PA-C
150 Valpreda Rd,
San Marcos, CA 92069-2973
(760) 736-6767
Not Available

Map and Direction




Provider's Profile

Full NameWilliam Robert Mathias
GenderMale
SpecialityPhysician Assistant
Location150 Valpreda Rd, San Marcos, California
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1285806323
  • Provider Enumeration Date: 03/28/2008
  • Last Update Date: 03/28/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 3375783129
  • Enrollment ID: I20230629002934

Medical Identifiers

Medical identifiers for William Robert Mathias such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1285806323NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
363A00000XPhysician Assistant 085.004666 (Illinois)Secondary
363A00000XPhysician Assistant 59627 (California)Primary

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. William Robert Mathias 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
William Robert Mathias, PA-C
814 Hinman Ave Unit 1,
Evanston, IL 60202-2360

Ph: (858) 699-3901
William Robert Mathias, PA-C
150 Valpreda Rd,
San Marcos, CA 92069-2973

Ph: (760) 736-6767

Reviews and Comments


Physician Assistant Nurses in San Marcos, CA

Stephanie N Stitzel, PA-C
Physician Assistant
Medicare: Medicare Enrolled
Practice Location: 150 Valpreda Rd, San Marcos, CA 92069
Phone: 760-736-6734    
Gabriela Andrea Juache, PA-C
Physician Assistant
Medicare: Accepting Medicare Assignments
Practice Location: 150 Valpreda Rd, San Marcos, CA 92069
Phone: 760-736-6767    Fax: 760-736-8740
Bryant Nam Vo, PA
Physician Assistant
Medicare: Not Enrolled in Medicare
Practice Location: 2150 Coast Ave, San Marcos, CA 92078
Phone: 760-481-8087    
Mrs. Jodi Laine Tarutis, PA-C
Physician Assistant
Medicare: Accepting Medicare Assignments
Practice Location: 150 Valpreda Rd, San Marcos, CA 92069
Phone: 760-736-6700    Fax: 760-736-6700
Katie Lynn Doolittle,
Physician Assistant
Medicare: Not Enrolled in Medicare
Practice Location: 960 W San Marcos Blvd Ste 210, San Marcos, CA 92078
Phone: 760-736-8091    
Gary R. Chiswick Jr., P.A.
Physician Assistant
Medicare: Medicare Enrolled
Practice Location: 150 Valpreda Rd, San Marcos, CA 92069
Phone: 760-736-6780    
Ms. Joanna Shiow-jun Lee, PA-C
Physician Assistant
Medicare: Not Enrolled in Medicare
Practice Location: 2002 Silverado St, San Marcos, CA 92078
Phone: 909-263-1036    

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.