Quick answers
- Does Elizabeth Z. Gregory accept Medicare assignment?
- Yes. Medicare's clinician data says Elizabeth Z. Gregory 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 Elizabeth Z. Gregory see?
- In 2024, CMS data shows 177 Original Medicare patients and 295 services for Elizabeth Z. Gregory. This counts Original Medicare only and measures volume, not quality.
- What is Elizabeth Z. Gregory's NPI number?
- 1801329511. 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 Elizabeth Z. Gregory, 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 | 177 |
|---|---|
| Services billed to Medicare | 295 |
| Different services or procedures | 26 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)74 services
- Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)44 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)41 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)31 services
- Biopsy of large bowel using a flexible endoscope (45380)22 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 pressure73%
- Arthritis59%
- Anxiety44%
- Depression38%
- Chronic kidney disease37%
Hospitals where Elizabeth Z. Gregory works
Medicare's Facility Affiliation Data lists Elizabeth Z. Gregory 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.
- Kaleida HealthBuffalo, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330005
- Kenmore Mercy HospitalKenmore, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330102
- Mercy Hospital of BuffaloBuffalo, NY · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 330279
- Sisters of Charity HospitalBuffalo, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330078
Practice locations
Addresses where Elizabeth Z. Gregory is enrolled with Medicare (CMS data updated October 2, 2026).
- 60 Maple Rd, Suite 1Williamsville, NY 14221 (716) 626‑5250
- 6935 Elaine DrNiagara Falls, NY 14304 (716) 626‑5250
- Elm and Carlton StBuffalo, NY 14263 (716) 845‑2300
Group practices
Medicare enrollment lists Elizabeth Z. Gregory as a member of these groups (CMS data updated October 2, 2026).
- Roswell Park Cancer Institute488 clinicians in the group
- Gastroenterology Associates LLP30 clinicians in the group
Specialties
- Gastroenterologyprimary
Other gastroenterologists in Williamsville
Clinicians with the same Medicare primary specialty in Williamsville, NY — not a recommendation.
Other clinicians in Roswell Park Cancer Institute
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | State University Of New York At Buffalo School Of Medicine |
| Graduation year | 2017 (9 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1801329511 |
| 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