Quick answers
- Where does Collin P. Duffy see patients?
- Medicare's clinician data lists 4 practice locations, including Centereach, NY, Shirley, NY and East Patchogue, NY. Call before your visit to confirm the address.
- What is Collin P. Duffy's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Collin P. Duffy accept Medicare assignment?
- Yes. Medicare's clinician data says Collin P. Duffy 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.
- What is the phone number for Collin P. Duffy?
- (631) 543-1440, as listed in official Medicare / NPI Registry data.
- What is Collin P. Duffy's NPI number?
- 1619699493. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Collin P. Duffy is enrolled with Medicare (CMS data updated 2026-10-02).
- 1500 Middle Country RdCentereach, NY 11720 (631) 543‑1440
- 1500 William Floyd Pkwy, Fl 2 Room 201Shirley, NY 11967 (631) 543‑1440
- 285 Sills RdEast Patchogue, NY 11772 (631) 543‑1440
- 994 W Jericho Tpke, Suite 104Smithtown, NY 11787 (631) 543‑1440
Group practices
Medicare enrollment lists Collin P. Duffy as a member of this group (CMS data updated 2026-10-02).
- Timothy D. Groth MD PC43 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Centereach
Clinicians with the same Medicare primary specialty in Centereach, NY — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2022 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1619699493 |
| 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
- 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