Sarah C. Foster, MD

Medicare activity in 2024

Official CMS public-use data for Sarah C. Foster, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Most frequent services

1. Emergency department visit with high level of medical decision making (99285)332 services
2. Emergency department visit with moderate level of medical decision making (99284)149 services
3. Critical care, first 30-74 minutes (99291)57 services
4. Emergency department visit with low level of medical decision making (99283)12 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

• High blood pressure75%
• High cholesterol75%
• Arthritis55%
• Ischemic heart disease41%
• Diabetes37%
• Chronic kidney disease36%

Hospitals where Sarah C. Foster works

Medicare's Facility Affiliation Data lists Sarah C. Foster at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

• Fauquier HospitalWarrenton, VA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 490023
• Inova Fair Oaks HospitalFairfax, VA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: not listed by Medicare · CCN 490101

Practice locations

Addresses where Sarah C. Foster is enrolled with Medicare (CMS data updated October 2, 2026).

• 3600 Joseph Siewick DrFairfax, VA 22033 (703) 391‑3600

Group practices

Medicare enrollment lists Sarah C. Foster as a member of this group (CMS data updated October 2, 2026).

• Fair Oaks Emergency Physicians PLLC19 clinicians in the group

Specialties

• Emergency Medicineprimary

Find other Emergency Medicine doctors in Virginia →

Other emergency medicine doctors in Fairfax

Clinicians with the same Medicare primary specialty in Fairfax, VA — not a recommendation.

• Sunil Saxena, MD
• Steven Taylor, DO
• Paul C. Tripathi, MD
• Angela J. Brown, MD
• Eric J. Ahlers, MD
• Deepak K. Sachdeva, MD
• Alexander Nicholas D. Sutingco, MD
• Adam Reiss, MD

All emergency medicine doctors in Fairfax →

Other clinicians in Fair Oaks Emergency Physicians PLLC

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Steven Taylor, DO
• Olga P. Mischenko, NP
• Paul C. Tripathi, MD
• Angela J. Brown, MD
• Christopher N. Mills, MD
• Patrick J. Meehan, MD

Clinician information

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians