Quick answers
- Does Zachary S. Peacock accept Medicare assignment?
- Yes. Medicare's clinician data says Zachary S. Peacock accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Zachary S. Peacock see?
- In 2024, CMS data shows 101 Original Medicare patients and 249 services for Zachary S. Peacock. This counts Original Medicare only and measures volume, not quality.
- What is Zachary S. Peacock's NPI number?
- 1457587065. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Zachary S. Peacock, 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.
| Original Medicare patients | 101 |
|---|---|
| Services billed to Medicare | 249 |
| Different services or procedures | 27 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Ct scan of face without contrast (70486)52 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)37 services
- X-ray of lower jaws, upper jaws and teeth (70355)34 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)33 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)24 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 cholesterol69%
- High blood pressure65%
- Arthritis47%
- Anxiety34%
- Ischemic heart disease33%
- Osteoporosis30%
Hospitals where Zachary S. Peacock works
Medicare's Facility Affiliation Data lists Zachary S. Peacock 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.
- Massachusetts General HospitalBoston, MA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 220071
Practice locations
Addresses where Zachary S. Peacock is enrolled with Medicare (CMS data updated October 2, 2026).
- 55 Fruit StBoston, MA 02114 (617) 724‑0287
Group practices
Medicare enrollment lists Zachary S. Peacock as a member of this group (CMS data updated October 2, 2026).
- Massachusetts General Physicians Organization Inc3,558 clinicians in the group
Specialties
- Maxillofacial Surgeryprimary
- Oral Surgeryalso
Find other clinicians: Maxillofacial Surgery, Massachusetts →
Other maxillofacial surgeons in Boston
Clinicians with the same Medicare primary specialty in Boston, MA — not a recommendation.
Other clinicians in Massachusetts General Physicians Organization Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| School | University Of California, San Francisco School Of Medicine |
|---|---|
| Graduation year | 2007 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1457587065 |
| Corrections | Report an error or suggest an update → |
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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians