Sara S. Ellingwood, MD

Medicare activity in 2024

Official CMS public-use data for Sara S. Ellingwood, 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. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)29 services
2. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)11 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 pressure70%
• High cholesterol59%
• Arthritis45%
• Asthma36%
• COPD32%
• Anxiety27%

Hospitals where Sara S. Ellingwood works

Medicare's Facility Affiliation Data lists Sara S. Ellingwood 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.

• University of Michigan Health SystemAnn Arbor, MI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 230046

Practice locations

Addresses where Sara S. Ellingwood is enrolled with Medicare (CMS data updated October 2, 2026).

• 1500 E Medical Ctr DrAnn Arbor, MI 48109 (734) 647‑5940
• 24 Frank Lloyd Wright DrAnn Arbor, MI 48105 (734) 647‑5940
• 380 Parkland PlzAnn Arbor, MI 48103 (734) 647‑5940

Group practices

Medicare enrollment lists Sara S. Ellingwood as a member of this group (CMS data updated October 2, 2026).

• Regents of the University of Michigan3,346 clinicians in the group

Specialties

• Allergy/Immunologyprimary
• Internal Medicinealso

Find other Allergy/Immunology doctors in Michigan →

Other allergist and immunologists in Ann Arbor

Clinicians with the same Medicare primary specialty in Ann Arbor, MI — not a recommendation.

• Mirie Hosler, MD
• Anna Kovalszki, MD
• Lawrence R. Hennessey, MD
• Cem Akin, MD
• Deborah L. Lee, MD
• Aimee L. Speck, MD
• Mohammed Rafeeq, MD
• Deborah Oberdoerster, MD

All allergist and immunologists in Ann Arbor →

Other clinicians in Regents of the University of Michigan

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

• James E. Carpenter, MD
• John K. Hargrove
• Taylor R. Petersen, PA
• Jennifer L. Aldea
• Jordan L. Fennema, MD
• Sarah H. Sperry

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