Peter J. Fagenholz, MD

Medicare activity in 2024

Official CMS public-use data for Peter J. Fagenholz, 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. New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)51 services
2. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)50 services
3. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)46 services
4. Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)46 services
5. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)41 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 cholesterol72%
• Arthritis49%
• Anxiety43%
• Ischemic heart disease38%
• Depression32%

Hospitals where Peter J. Fagenholz works

Medicare's Facility Affiliation Data lists Peter J. Fagenholz 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.

• Brigham and Women's HospitalBoston, MA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 220110
• Massachusetts General HospitalBoston, MA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 220071
• Newton-Wellesley HospitalNewton, MA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 220101
• North Shore Medical Center -Salem, MA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 220035
• The Cooley Dickinson Hospital IncNorthampton, MA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 220015

Practice locations

Addresses where Peter J. Fagenholz is enrolled with Medicare (CMS data updated October 2, 2026).

• 55 Fruit StBoston, MA 02114 (617) 726‑2000

Group practices

Medicare enrollment lists Peter J. Fagenholz as a member of these groups (CMS data updated October 2, 2026).

• Massachusetts General Physicians Organization Inc3,558 clinicians in the group
• The General Hospital Corporation1,267 clinicians in the group

Specialties

• General Surgeryprimary
• Emergency Medicinealso

Find other General Surgery doctors in Massachusetts →

Other general surgeons in Boston

Clinicians with the same Medicare primary specialty in Boston, MA — not a recommendation.

• Brian J. Carmine, MD
• Malcolm Robinson, MD
• Griffin H. Olsen, MD
• Jennifer Irani
• Elizabeth Lilley, MD
• Alban E. Longchamp, MD
• Christina A. Minami, MD
• Frederick T. Drake, MD

All general surgeons in Boston →

Other clinicians in Massachusetts General Physicians Organization Inc

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

• Gulisa Turashvili, MD
• Jason B. Kerzer, DO
• Muhamed Hadzipasic, MD
• Hannah M. Gilligan, MD
• Marta Gonzalez Catalan
• Ryan D. Willett, 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