Dr Sara C Williams, MD - Medicare Internal Medicine in Fairfax, VA

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Dr Sara C Williams, MD is a medicare enrolled "Internal Medicine" physician in Fairfax, Virginia. She graduated from medical school in 2014 and has 10 years of diverse experience with area of expertise as Internal Medicine. She is a member of the group practice Fair Oaks Hospitalist Physicians, Pllc, Inova Health Care Services, Inova Health Care Services and her current practice location is 3580 Joseph Siewick Dr Ste 306, Fairfax, Virginia. You can reach out to her office (for appointments etc.) via phone at (703) 391-4520.

Dr Sara C Williams is licensed to practice in Virginia (license number 0101262493) and she also participates in the medicare program. She accepts medicare assignments (which means she accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and her NPI Number is 1730509720.

Contact Information

Dr Sara C Williams, MD
3580 Joseph Siewick Dr Ste 306,
Fairfax, VA 22033-1764
(703) 391-4520
(703) 391-4521

Map and Direction




Physician's Profile

Full NameDr Sara C Williams
GenderFemale
SpecialityInternal Medicine
Experience10 Years
Location3580 Joseph Siewick Dr Ste 306, Fairfax, Virginia
Accepts Medicare AssignmentsYes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Dr Sara C Williams graduated from medical school in 2014
  NPI Data:
  • NPI Number: 1730509720
  • Provider Enumeration Date: 04/17/2014
  • Last Update Date: 07/20/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 4688977382
  • Enrollment ID: I20170714002347

Medical Identifiers

Medical identifiers for Dr Sara C Williams such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1730509720NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 0101262493 (Virginia)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Inova Fair Oaks HospitalFairfax, VAHospital
Inova Fairfax HospitalFalls church, VAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Fair Oaks Hospitalist Physicians, Pllc105241986834
Inova Health Care Services24663510931778
Inova Health Care Services24663510931778

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. Dr Sara C Williams allows following entities to bill medicare on her behalf.
Entity NameInova Health Care Services
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1952320061
PECOS PAC ID: 2466351093
Enrollment ID: O20040102000644
Entity NameFair Oaks Hospitalist Physicians, Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1275601205
PECOS PAC ID: 1052419868
Enrollment ID: O20070601000279

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. Dr Sara C Williams 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
Dr Sara C Williams, MD
Po Box 37174,
Baltimore, MD 21297-3174

Ph: (571) 423-5699		Dr Sara C Williams, MD
3580 Joseph Siewick Dr Ste 306,
Fairfax, VA 22033-1764

Ph: (703) 391-4520

Reviews and Comments


Internal Medicine Doctors in Fairfax, VA

Shivangi Vachhani, M.D.
Internal Medicine
Medicare: Medicare Enrolled
Practice Location: 3700 Joseph Siewick Dr Ste 408a, Fairfax, VA 22033
Phone: 877-511-4625    Fax: 703-204-9006
Dr. Raymund S Cuevo, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 8081 Innovation Park Dr, Fairfax, VA 22031
Phone: 571-472-4724    Fax: 571-472-0241
Dr. Michael Maitland, M.D., PH.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 8081 Innovation Park Dr, Fairfax, VA 22031
Phone: 571-472-4724    Fax: 571-472-1601
Aswani Kumar Suthrave, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 3600 Joseph Siewick Dr, Fairfax, VA 22033
Phone: 703-391-3600    
Nader H Balba, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 3028 Javier Rd Ste 500, Fairfax, VA 22031
Phone: 703-698-8960    Fax: 571-494-5794
Rona Harthill Earle,
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 3020 Hamaker Ct Ste B102, Fairfax, VA 22031
Phone: 703-573-4072    Fax: 703-572-2153
Renee Elizabeth Funches, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 12255 Fair Lakes Pkwy, Kaiser Permanente Fair Oaks Medical Center, Fairfax, VA 22033
Phone: 703-934-5700    

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.