Gregory Haffner, M.D.
NPI 1407886450 · Ophthalmology Physician · Hamden, CT
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Haffner, M.D. is a Ophthalmology Physician provider in Hamden, CT (NPI 1407886450).
Provider details
- NPI number
- 1407886450
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 043419 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
4,086 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Imaging of Retina92134 | 1,823 | $43 |
| Injection of Drug Into Eye67028 | 1,189 | $130 |
| Established Patient Complete Exam of Visual System92014 | 410 | $134 |
| Established Patient Problem Focused Exam of Visual System92012 | 181 | $91 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 150 | $137 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 140 | $97 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 5 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisolone Acetate | 81 | 55 |
| Moxifloxacin Hclbrand: Moxifloxacin | 43 | 37 |
| Atropine Sulfate | 36 | 35 |
| Ketorolac Tromethamine | 12 | — |
| Timolol Maleate | 11 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$239 across 9 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-04
- Last updated
- 2011-06-14
Frequently asked questions
- What is Gregory Haffner's NPI number?
- Gregory Haffner's National Provider Identifier (NPI) is 1407886450, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Haffner's specialty?
- Gregory Haffner is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Haffner located?
- Gregory Haffner's practice location on file with NPPES is 2200 Whitney Ave, Hamden, CT 06518-3691.
- What is Gregory Haffner's phone number?
- The practice phone number listed in the NPPES registry for Gregory Haffner is (203) 288-2020.
- Does Gregory Haffner accept Medicare?
- Gregory Haffner is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Haffner's NPI active?
- Yes — Gregory Haffner's NPI (1407886450) is active in the NPPES registry as of the last update on 2011-06-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.