Sara C. Williams, M.D.
Internal Medicine Physician · Fairfax, VA
Sara C. Williams, M.D. is an internal medicine physician with a practice address in Fairfax, Virginia, and NPI 1730509720, issued on Apr 17, 2014. Check the license (Virginia 0101262493, as entered in NPPES) on the Virginia Department of Health Professions; the Medicare figures below come from public CMS files.
- Name
- Sara C. Williams
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 0101262493 VA
Self-reported in NPPES; status is on the state search - Practice location
- 3580 Joseph Siewick Dr Ste 306, Fairfax, VA 22033
- Phone
- (703) 391-4520
- Enumerated
- Apr 17, 2014
- Record last updated
- Jul 20, 2022
- Fax
- (703) 391-4521
- Medicare enrollment
- Enrolled (PECOS I20251107002652); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,599 in Virginia → Look up another NPI →
Also registered at 3580 Joseph Siewick Dr Ste 306
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Sheila Hautbois, PA-CPhysician Assistant1609376086
- Sandy Ibrahim, MDFamily Medicine Physician1437299658
- Michael KimInternal Medicine Physician1235495219
- Tucker Landry, LCSWClinical Social Worker1700364585
- Brian Masterson, MD, MPHPsychiatry Physician1225062383
Verify Sara C. Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersVirginia Department of Health Professions
Search for license 0101262493Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average internal medicine physician in 2024
188 Medicare Part D claims for 76 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 12 claims were for opioids.
Most prescribed
- Amlodipine Besylate16 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 2 group practices
- Fair Oaks Hospitalist Physicians, PLLCFairfax, VA
- Hawaii Permanente Medical Group IncHonolulu, HI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sara C. Williams among 3,599 internal medicine physician records in Virginia
Sara C. Williams, M.D. is one of 3,599 internal medicine physician records with a practice address in Virginia. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 72% of them.
- NPI issued2014 · 72% of these records are older, 25% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2014 · median 2003 among the 2,234 with a school on file
- Record last updated2022 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Virginia practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
108 internal medicine physician records list a practice address in Fairfax
They are 108 of the 6,584 NPPES records with a practice address in Fairfax, and 3,599 internal medicine physician records in Virginia.
All 3,599 in Virginia → Every provider in Fairfax → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Wasel Akbary, DOFairfax, VA 220331639189194
- Yodit Benalfew, MDFairfax, VA 220331699847186
- Marc Eisenbaum, M.D.Fairfax, VA 220331083710008
- Adil Ghauri, M.D.Fairfax, VA 220331689671414
- Michael Golembieski, M.D.Fairfax, VA 220331912079476
- Michael Greene, M.D.Fairfax, VA 220331316045644
- Elizabeth Halabuk, M.D.Fairfax, VA 220331346214517
- Thienquang Le, M.D.Fairfax, VA 220331538254875
Common questions
What is Sara C. Williams, M.D.'s NPI number?
Sara C. Williams, M.D.'s National Provider Identifier (NPI) is 1730509720, issued on Apr 17, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Sara C. Williams, M.D. located?
The NPPES record lists a practice address at 3580 Joseph Siewick Dr Ste 306, Fairfax, VA, 22033. Phone: (703) 391-4520. Providers update this record themselves, so call before visiting.
How can I verify Sara C. Williams, M.D.'s license?
NPPES lists Virginia license number 0101262493, as entered by the provider. Search the Virginia Department of Health Professions at https://dhp.virginiainteractive.org/lookup/index. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Sara C. Williams, M.D. prescribe under Medicare Part D?
In 2024, Sara C. Williams, M.D. had 188 Medicare Part D claims for 76 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.