William James Peterson, MD - Medicare Emergency Medicine in Vacaville, CA

William James Peterson, MD is a medicare enrolled "Emergency Medicine" physician in Vacaville, California. His current practice location is Vacavalley Hospital, 1000 Nut Tree Road, Vacaville, California. You can reach out to his office (for appointments etc.) via phone at (707) 446-4000.

William James Peterson is licensed to practice in California (license number G56798) 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 1841236072.

Contact Information

William James Peterson, MD
Vacavalley Hospital, 1000 Nut Tree Road,
Vacaville, CA 95687
(707) 446-4000
Not Available

Map and Direction




Physician's Profile

Full NameWilliam James Peterson
GenderMale
SpecialityEmergency Medicine
LocationVacavalley Hospital, Vacaville, California
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1841236072
  • Provider Enumeration Date: 06/22/2006
  • Last Update Date: 07/08/2007
  Medicare PECOS Information:
  • PECOS PAC ID: 4486622206
  • Enrollment ID: I20040920001011

Medical Identifiers

Medical identifiers for William James Peterson such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1841236072NPI-NPPES
00G567981MedicaidCA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207P00000XEmergency Medicine G56798 (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. William James Peterson allows following entities to bill medicare on his behalf.
Entity NameContra Costa County
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1376620336
PECOS PAC ID: 8628052974
Enrollment ID: O20050707001058

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 James Peterson 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 James Peterson, MD
1528 Shannon Ct,
Benicia, CA 94510-2737

Ph: () -
William James Peterson, MD
Vacavalley Hospital, 1000 Nut Tree Road,
Vacaville, CA 95687

Ph: (707) 446-4000

Reviews and Comments


Emergency Medicine Doctors in Vacaville, CA

Milagros Arlene Gomez, PA-C
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: Vacavalley Hospital, 1000 Nut Tree Road, Vacaville, CA 95687
Phone: 707-446-4000    
Jennifer L. Sperandio, MD
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 1 Quality Dr, Vacaville, CA 95688
Phone: 707-453-5000    
Maricel Romelia Binongcal Dela Cruz,
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1 Quality Dr, Vacaville, CA 95688
Phone: 707-624-4000    
Scott Sweeny, D.O.
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1 Quality Dr, Vacaville, CA 95688
Phone: 707-624-2600    
Dr. Daniel Franklin Morris, M.D
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1 Quality Dr, Vacaville, CA 95688
Phone: 707-651-3373    
Aileen J. Jaber, MD
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1 Quality Dr, Vacaville, CA 95688
Phone: 707-453-5000    
Samuel Kim, M.D.
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1 Quality Dr, Vacaville, CA 95688
Phone: 707-624-4000    

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.