Sarah B. Himmelstein, MD

Medicare activity in 2024

Official CMS public-use data for Sarah B. Himmelstein, 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. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)22 services
2. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)17 services
3. New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)16 services
4. 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 cholesterol75%
• High blood pressure72%
• Arthritis52%
• Diabetes33%
• Anxiety31%
• Chronic kidney disease31%

Hospitals where Sarah B. Himmelstein works

Medicare's Facility Affiliation Data lists Sarah B. Himmelstein 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.

• Southern NH Medical CenterNashua, NH · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 300020

Practice locations

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

• 8 Prospect St N, 2 Dba Foundation Plastic SurgeryNashua, NH 03060 (603) 577‑3334

Group practices

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

• Foundation Medical Partners Inc317 clinicians in the group

Specialties

• General Surgeryprimary

Find other General Surgery doctors in New Hampshire →

Other general surgeons in Nashua

Clinicians with the same Medicare primary specialty in Nashua, NH — not a recommendation.

• David R. Halter, DO
• Kenneth F. Howe, MD
• Jennifer L. Peppers, MD
• Sanjay Gupta, MD
• Kristin Raven, MD
• Michael H. Remar, MD
• Syed Abbas, MD
• Emily E. Mackey, MD

All general surgeons in Nashua →

Other clinicians in Foundation Medical Partners Inc

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

• Jon Michael B. Vore Jr., DO
• Ernest K. Tabiri
• Win Kyaw, MD
• Ann Lo, MD
• Amanda L. Ponti
• Amitha Harish, 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