Quick answers
- Which hospitals does Marvin Grieff work at?
- Medicare's official clinician data lists Marvin Grieff at 3 hospitals: Clifton Springs Hospital and Clinic, Newark-Wayne Community Hospital and Rochester General Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Marvin Grieff see patients?
- Medicare's clinician data lists 2 practice locations, including Rochester, NY. Call before your visit to confirm the address.
- What is Marvin Grieff's specialty?
- Medicare lists Nephrology as the primary specialty.
- Does Marvin Grieff accept Medicare assignment?
- Yes. Medicare's clinician data says Marvin Grieff accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does Marvin Grieff offer telehealth?
- Medicare's clinician data says Marvin Grieff offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Marvin Grieff?
- (585) 922-4000, as listed in official Medicare / NPI Registry data.
- What is Marvin Grieff's NPI number?
- 1477500619. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Marvin Grieff works
Medicare's Facility Affiliation Data lists Marvin Grieff at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Clifton Springs Hospital and ClinicClifton Springs, NY · Acute Care Hospital · CCN 330265
- Newark-Wayne Community HospitalNewark, NY · Acute Care Hospital · CCN 330030
- Rochester General HospitalRochester, NY · Acute Care Hospital · CCN 330125
Practice locations
Addresses where Marvin Grieff is enrolled with Medicare (CMS data updated 2026-10-02).
- 1425 Portland AveRochester, NY 14621 (585) 922‑4000
- 370 E Ridge RdRochester, NY 14621 (585) 922‑0600
Group practices
Medicare enrollment lists Marvin Grieff as a member of this group (CMS data updated 2026-10-02).
- Rochester General Hospital1,182 clinicians in the group
Specialties
- Nephrologyprimary
Other nephrologists in Rochester
Clinicians with the same Medicare primary specialty in Rochester, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1986 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1477500619 |
| 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 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- 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