Doug John Williamson, MD - Medicare in Riverside, CA

Doug John Williamson, MD is a medicare enrolled "Emergency Medicine" physician in Riverside, California. His current practice location is 10800 Magnolia Ave, Riverside, California. You can reach out to his office (for appointments etc.) via phone at (909) 353-2000.

Doug John Williamson is licensed to practice in California (license number A79642) 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 1033267067.

Contact Information

Doug John Williamson, MD
10800 Magnolia Ave,
Riverside, CA 92505-3043
(909) 353-2000
Not Available

Map and Direction




Physician's Profile

Full NameDoug John Williamson
GenderMale
Speciality
Experience Years
Location10800 Magnolia Ave, Riverside, 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:
  • Doug John Williamson attended and graduated from in
  NPI Data:
  • NPI Number: 1033267067
  • Provider Enumeration Date: 01/08/2007
  • Last Update Date: 11/29/2021
  Medicare PECOS Information:
  • PECOS PAC ID:
  • Enrollment ID:

Medical Identifiers

Medical identifiers for Doug John Williamson such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1033267067NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207P00000XEmergency Medicine A79642 (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. Doug John Williamson 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
Doug John Williamson, MD
10800 Magnolia Ave,
Riverside, CA 92505-3043

Ph: (909) 353-2000
Doug John Williamson, MD
10800 Magnolia Ave,
Riverside, CA 92505-3043

Ph: (909) 353-2000

Reviews and Comments


Emergency Medicine Doctors in Riverside, CA

Dr. Chad Leroy Clark, M.D.
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 3865 Jackson St, Riverside, CA 92503
Phone: 951-352-5666    Fax: 951-352-5445
Dr. David Stuart Siegel, MD
Emergency Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 3425 Torrey St, Riverside, CA 92503
Phone: 561-685-6148    
Kenneth Johnson, MD
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 4445 Magnolia Ave, Riverside, CA 92501
Phone: 951-788-3537    Fax: 951-788-3173
Dr. Ernest Woodhouse, M.D.
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 4440 Magnolia Ave., Riverside, CA 92501
Phone: 951-788-3200    
Dr. Michael Kang, M.D.
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 4445 Magnolia Ave, Riverside, CA 92501
Phone: 951-684-3910    
Dr. Humberto Alirio Silva, M.D.
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 3865 Jackson St, Riverside, CA 92503
Phone: 951-352-5666    Fax: 951-352-5445

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.