Quick answers
- Where does Gregory M. Haffner see patients?
- Medicare's clinician data lists 2 practice locations, including Westport, CT and Hamden, CT. Call before your visit to confirm the address.
- What is Gregory M. Haffner's specialty?
- Medicare lists Ophthalmology as the primary specialty.
- Does Gregory M. Haffner accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory M. Haffner 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 Gregory M. Haffner?
- (203) 222-7474, as listed in official Medicare / NPI Registry data.
- What is Gregory M. Haffner's NPI number?
- 1407886450. 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 Gregory M. Haffner is enrolled with Medicare (CMS data updated 2026-10-02).
- 162 Kings Hwy NWestport, CT 06880 (203) 222‑7474
- 2200 Whitney Ave, Suite 300Hamden, CT 06518 (203) 288‑2020
Group practices
Medicare enrollment lists Gregory M. Haffner as a member of this group (CMS data updated 2026-10-02).
- Refocus Eye Health of Central Connecticut PC36 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Westport
Clinicians with the same Medicare primary specialty in Westport, CT — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2001 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1407886450 |
| 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