Zachary D. Walton, MD

Medicare activity in 2024

Official CMS public-use data for Zachary D. Walton, 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 large bowel using an endoscope (00811)123 services
2. Anesthesia for exam of colon using an endoscope (00812)56 services
3. Anesthesia for lens surgery (00142)25 services
4. Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)25 services
5. Anesthesia for procedure on small and large bowel using an endoscope (00813)15 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 cholesterol74%
• High blood pressure61%
• Arthritis38%
• Diabetes24%
• Depression20%
• Ischemic heart disease19%

Hospitals where Zachary D. Walton works

Medicare's Facility Affiliation Data lists Zachary D. Walton 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.

• Anna Jaques HospitalNewburyport, MA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 220029
• Sharp Chula Vista Medical CenterChula Vista, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050222
• Sharp Memorial HospitalSan Diego, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050100

Practice locations

Addresses where Zachary D. Walton is enrolled with Medicare (CMS data updated October 2, 2026).

• 25 Highland AveNewburyport, MA 01950 (781) 983‑9088
• 330 Mount Auburn StCambridge, MA 02138 (781) 453‑7300

Group practices

Medicare enrollment lists Zachary D. Walton as a member of this group (CMS data updated October 2, 2026).

• Associated Physicians of Harvard Medical Faculty Physicians at Beth Is565 clinicians in the group

Specialties

• Anesthesiologyprimary

Find other Anesthesiology doctors in Massachusetts →

Other anesthesiologists in Newburyport

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

• Michael D. Kaufman, MD
• Kenneth R. Branton, MD
• Neil W. Oliwa, MD
• Charles C. Ho, MD
• Maitriyi J. Shah, MD
• Vladimir Eisenberg, MD
• Daniel P. Walsh, MD
• Michael A. Natale, MD

All anesthesiologists in Newburyport →

Other clinicians in Associated Physicians of Harvard Medical Faculty Physicians at Beth Is

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

• Gabriel G. Erion Barner
• Lisa Wollman, MD
• Hans Chiang, MD
• Tahnee K. Sidhu, MD
• Alexandra Post, CNA
• Bryan Zoll, 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