Quick answers
- Does Maria C. McGreevy accept Medicare assignment?
- Yes. Medicare's clinician data says Maria C. McGreevy 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 Maria C. McGreevy see?
- In 2024, CMS data shows 68 Original Medicare patients and 273 services for Maria C. McGreevy. This counts Original Medicare only and measures volume, not quality.
- What is Maria C. McGreevy's NPI number?
- 1659734366. 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 Maria C. McGreevy, 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 | 68 |
|---|---|
| Services billed to Medicare | 273 |
| Different services or procedures | 12 |
| Participating Medicare provider | Yes |
| Average age of these patients | 70 |
Most frequent services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)103 services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)87 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)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 blood pressure68%
- High cholesterol54%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)49%
- Depression38%
- Anxiety38%
- Arthritis37%
Hospitals where Maria C. McGreevy works
Medicare's Facility Affiliation Data lists Maria C. McGreevy 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.
- Highland HospitalRochester, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330164
- Nicholas H Noyes Memorial HospitalDansville, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330238
- Strong Memorial HospitalRochester, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330285
Practice locations
Addresses where Maria C. McGreevy is enrolled with Medicare (CMS data updated October 2, 2026).
- 601 Elmwood AveRochester, NY 14642 (585) 275‑6687
Group practices
Medicare enrollment lists Maria C. McGreevy as a member of these groups (CMS data updated October 2, 2026).
- University of Rochester973 clinicians in the group
- Hematology Clinical Group81 clinicians in the group
Specialties
- Medical Oncologyprimary
- Internal Medicinealso
Other oncologists in Rochester
Clinicians with the same Medicare primary specialty in Rochester, NY — not a recommendation.
Other clinicians in University of Rochester
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | State University Of Ny Upstate Medical University |
| Graduation year | 2016 (10 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1659734366 |
| 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