Mr William J Barker, MD - Medicare in Warrenton, VA

Mr William J Barker, MD is a medicare enrolled "Emergency Medicine - Emergency Medical Services" physician in Warrenton, Virginia. His current practice location is 500 Hospital Dr, Warrenton, Virginia. You can reach out to his office (for appointments etc.) via phone at (540) 349-0595.

Mr William J Barker is licensed to practice in Virginia (license number 0101036994) 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 1770599847.

Contact Information

Mr William J Barker, MD
500 Hospital Dr,
Warrenton, VA 20186-3027
(540) 349-0595
(540) 349-0587

Map and Direction




Physician's Profile

Full NameMr William J Barker
GenderMale
Speciality
Experience Years
Location500 Hospital Dr, Warrenton, Virginia
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:
  • Mr William J Barker attended and graduated from in
  NPI Data:
  • NPI Number: 1770599847
  • Provider Enumeration Date: 07/31/2006
  • Last Update Date: 04/30/2008
  Medicare PECOS Information:
  • PECOS PAC ID:
  • Enrollment ID:

Medical Identifiers

Medical identifiers for Mr William J Barker such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1770599847NPI-NPPES
006028608MedicaidVA
010055601MedicaidVA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207PE0004XEmergency Medicine - Emergency Medical Services 0101036994 (Virginia)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. Mr William J Barker 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
Mr William J Barker, MD
Po Box 223323,
Chantilly, VA 20153-3323

Ph: (540) 349-0595
Mr William J Barker, MD
500 Hospital Dr,
Warrenton, VA 20186-3027

Ph: (540) 349-0595

Reviews and Comments


Emergency Medicine Doctors in Warrenton, VA

Dr. Alexander-nicholas Desierto Sutingco, MD FACEP
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 500 Hospital Dr, Warrenton, VA 20186
Phone: 540-349-0595    Fax: 540-349-0587
Dr. Joseph G Servideo, MD
Emergency Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 500 Hospital Dr, Warrenton, VA 20186
Phone: 540-349-0595    
Christine Snell, MD
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 500 Hospital Dr, Warrenton, VA 20186
Phone: 540-349-0595    Fax: 540-349-0587
Mr. Joseph Chu, MD
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 500 Hospital Dr, Warrenton, VA 20186
Phone: 540-349-0595    
Mr. Matthew P Rhames, MD
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 500 Hospital Dr, Warrenton, VA 20186
Phone: 540-349-0595    
Kristy S Reynolds, MD
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 500 Hospital Dr, Warrenton, VA 20186
Phone: 540-349-0595    
Mr. Jeffrey A Joseph, DO
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 500 Hospital Dr, Warrenton, VA 20186
Phone: 540-349-0595    

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.