Pei Shan Zhao, MD

Medicare activity in 2024

Official CMS public-use data for Pei Shan Zhao, 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. Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)15 services
2. Anesthesia for exam of colon using an endoscope (00812)14 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%
• Arthritis41%
• Diabetes37%
• Anxiety35%
• Ischemic heart disease32%

Hospitals where Pei Shan Zhao works

Medicare's Facility Affiliation Data lists Pei Shan Zhao 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.

• Lowell General HospitalLowell, MA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 220063
• Tufts Medical CenterBoston, MA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 220116

Practice locations

Addresses where Pei Shan Zhao is enrolled with Medicare (CMS data updated October 2, 2026).

• 800 Washington StBoston, MA 02111 (617) 636‑6044

Group practices

Medicare enrollment lists Pei Shan Zhao as a member of this group (CMS data updated October 2, 2026).

• Pratt Anesthesiology Associates Inc155 clinicians in the group

Specialties

• Anesthesiologyprimary

Find other Anesthesiology doctors in Massachusetts →

Other anesthesiologists in Boston

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

• Roger K. Russell, MD
• Nilesh M. Mehta, MD
• Nathaniel R. Greenbaum, MD
• Francesca R. Colombo Pavini, MD
• Phillip E. Hess, MD
• Brian Ogara, MD
• Zeyu Hu, MD
• Richard J. Bremer, MD

All anesthesiologists in Boston →

Other clinicians in Pratt Anesthesiology Associates Inc

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

• Mohammad H. Esteghamati, MD
• Brian P. Ferla, MD
• Brigid Welber, CNA
• Pamela D. Freeman, CNA
• Monica S. Shook, MD
• Beth E. Okeefe, CNA

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