Greg Diamond, MD
NPI 1801894316 · Ophthalmology Physician · Fishkill, NY
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Greg Diamond, MD is a Ophthalmology Physician provider in Fishkill, NY (NPI 1801894316).
Provider details
- NPI number
- 1801894316
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 154910 (NY)
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
20 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
847 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) |
|---|---|---|
| Established Patient Complete Exam of Visual System92014 | 474 | $132 |
| Established Patient Problem Focused Exam of Visual System92012 | 169 | $93 |
| Exam of Visual Field With Extended Testing92083 | 89 | $67 |
| Imaging of Optic Nerve92133 | 75 | $36 |
| New Patient Complete Exam of Visual System92004 | 23 | $156 |
| Imaging of Retina92134 | 17 | $42 |
Typical Medicare-allowed amounts for these services range $36–$156 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 242 | 60 |
| Timolol Maleate | 28 | — |
| Brimonidine Tartrate | 19 | — |
| Erythromycin Basebrand: Erythromycin | 19 | 15 |
| Bimatoprostbrand: Lumigan | 17 | — |
| Cyclosporinebrand: Restasis | 16 | — |
| Travoprost | 15 | — |
| Dorzolamide Hcl/Timolol Maleat |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$37 across 1 record (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
- 2005-07-08
- Last updated
- 2015-09-09
Frequently asked questions
- What is Greg Diamond's NPI number?
- Greg Diamond's National Provider Identifier (NPI) is 1801894316, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Greg Diamond's specialty?
- Greg Diamond is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Greg Diamond located?
- Greg Diamond's practice location on file with NPPES is 200 Westage Business Ctr, Fishkill, NY 12524-2264.
- What is Greg Diamond's phone number?
- The practice phone number listed in the NPPES registry for Greg Diamond is (845) 896-9280.
- Does Greg Diamond accept Medicare?
- Greg Diamond is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Greg Diamond's NPI active?
- Yes — Greg Diamond's NPI (1801894316) is active in the NPPES registry as of the last update on 2015-09-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.