Quick answers
- Which hospitals does James L. Groff work at?
- Medicare's official clinician data lists James L. Groff at 1 hospital: Suny/Stony Brook University Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does James L. Groff see patients?
- Medicare's clinician data lists 1 practice location in Hampton Bays, NY. Call before your visit to confirm the address.
- What is James L. Groff's specialty?
- Medicare lists General Surgery as the primary specialty.
- Does James L. Groff accept Medicare assignment?
- Medicare's clinician data says James L. Groff may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is the phone number for James L. Groff?
- (631) 919-5205, as listed in official Medicare / NPI Registry data.
- What is James L. Groff's NPI number?
- 1598050155. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where James L. Groff works
Medicare's Facility Affiliation Data lists James L. Groff at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Suny/Stony Brook University HospitalStony Brook, NY · Acute Care Hospital · CCN 330393
Practice locations
Addresses where James L. Groff is enrolled with Medicare (CMS data updated 2026-10-02).
- 9 Shawnee StHampton Bays, NY 11946 (631) 919‑5205
Specialties
- General Surgeryprimary
Other general surgeons in Hampton Bays
Clinicians with the same Medicare primary specialty in Hampton Bays, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Lake Erie College Of Osteopathic Medicine, Erie |
| Graduation year | 2011 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1598050155 |
| 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