William Norman Hamstra, DO - Medicare in San Ramon, CA

William Norman Hamstra, DO is a medicare enrolled "Surgery" physician in San Ramon, California. His current practice location is 2305 Camino Ramon, Suite 217, San Ramon, California. You can reach out to his office (for appointments etc.) via phone at (925) 447-0660.

William Norman Hamstra is licensed to practice in California (license number 20A5413) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1306835723.

Contact Information

William Norman Hamstra, DO
2305 Camino Ramon, Suite 217,
San Ramon, CA 94583-1396
(925) 447-0660
(925) 443-7506

Map and Direction




Physician's Profile

Full NameWilliam Norman Hamstra
GenderMale
Speciality
Experience Years
Location2305 Camino Ramon, San Ramon, California
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • William Norman Hamstra attended and graduated from in
  NPI Data:
  • NPI Number: 1306835723
  • Provider Enumeration Date: 10/18/2005
  • Last Update Date: 02/11/2022
  Medicare PECOS Information:
  • PECOS PAC ID:
  • Enrollment ID:

Medical Identifiers

Medical identifiers for William Norman Hamstra such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1306835723NPI-NPPES
00AX54131MedicaidCA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
208600000XSurgery 20A5413 (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 Norman Hamstra 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 Norman Hamstra, DO
2305 Camino Ramon, Suite 217,
San Ramon, CA 94583-1396

Ph: (925) 447-0660
William Norman Hamstra, DO
2305 Camino Ramon, Suite 217,
San Ramon, CA 94583-1396

Ph: (925) 447-0660

Reviews and Comments


Surgery Doctors in San Ramon, CA

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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.