Donald Widder, - Medicare Family Medicine in Martinez, CA

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Donald Widder, is a medicare enrolled "Family Medicine" physician in Martinez, California. His current practice location is 2500 Alhambra Ave, Martinez, California. You can reach out to his office (for appointments etc.) via phone at (925) 370-5110.

Donald Widder is licensed to practice in California (license number G55185) 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 1033287529.

Contact Information

Donald Widder,
2500 Alhambra Ave,
Martinez, CA 94553-3156
(925) 370-5110
(925) 370-5142

Map and Direction




Physician's Profile

Full NameDonald Widder
GenderMale
SpecialityFamily Medicine
Location2500 Alhambra Ave, Martinez, California
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1033287529
  • Provider Enumeration Date: 12/01/2006
  • Last Update Date: 05/21/2013
  Medicare PECOS Information:
  • PECOS PAC ID: 6204024714
  • Enrollment ID: I20101228000853

Medical Identifiers

Medical identifiers for Donald Widder such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1033287529NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207Q00000XFamily Medicine G55185 (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. Donald Widder allows following entities to bill medicare on his behalf.
Entity NameModesto Radiological Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1992747547
PECOS PAC ID: 2062300239
Enrollment ID: O20040513000453

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. Donald Widder 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
Donald Widder,
50 Douglas Dr, Suite 391,
Martinez, CA 94553-4098

Ph: (925) 957-5429		Donald Widder,
2500 Alhambra Ave,
Martinez, CA 94553-3156

Ph: (925) 370-5110

Reviews and Comments


Family Medicine Doctors in Martinez, CA

Charlotte Standefer,
Family Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 2500 Alhambra Ave, Martinez, CA 94553
Phone: 925-370-5110    Fax: 925-370-5142
Clarisse Anne R. Wong, MD
Family Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 200 Muir Rd, Martinez, CA 94553
Phone: 925-372-1999    
Michelle Orengo-mcfarlane, M.D.
Family Medicine
Medicare: Medicare Enrolled
Practice Location: 2500 Alhambra Ave, Martinez, CA 94553
Phone: 510-231-9400    Fax: 510-231-9401
David E Longstroth, M.D.
Family Medicine
Medicare: Medicare Enrolled
Practice Location: 2500 Alhambra Ave, Martinez, CA 94553
Phone: 925-370-5200    
Aaron Eliot Gach-kvenild, MD
Family Medicine
Medicare: Medicare Enrolled
Practice Location: 2500 Alhambra Ave, Martinez, CA 94553
Phone: 925-370-5117    
Elise Lewis,
Family Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 2500 Alhambra Ave, Martinez, CA 94553
Phone: 925-370-5110    Fax: 925-370-5142

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.