Diane Singer, M.D.
NPI 1275554826 · Ophthalmology Physician · Great Barrington, MA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Diane Singer, M.D. is a Ophthalmology Physician provider in Great Barrington, MA (NPI 1275554826).
Provider details
- NPI number
- 1275554826
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 243111 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
2,912 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 | 1,317 | $129 |
| Established Patient Problem Focused Exam of Visual System92012 | 906 | $91 |
| Imaging of Optic Nerve92133 | 206 | $36 |
| Exam of Visual Field With Extended Testing92083 | 179 | $65 |
| New Patient Complete Exam of Visual System92004 | 89 | $152 |
| Imaging of Retina92134 | 87 | $41 |
| New Patient Problem Focused Exam of Visual System92002 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 676 | 181 |
| Brimonidine Tartrate | 143 | 43 |
| Timolol Maleate | 136 | 42 |
| Ofloxacin | 79 | 69 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 66 | 18 |
| Dorzolamide Hcl | 57 | 18 |
| Erythromycin Basebrand: Erythromycin | 54 | 45 |
| Cyclosporine |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$78 across 4 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
- 2006-07-21
- Last updated
- 2016-01-28
Frequently asked questions
- What is Diane Singer's NPI number?
- Diane Singer's National Provider Identifier (NPI) is 1275554826, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diane Singer's specialty?
- Diane Singer is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Diane Singer located?
- Diane Singer's practice location on file with NPPES is 409 Stockbridge Rd, Great Barrington, MA 01230-1233.
- What is Diane Singer's phone number?
- The practice phone number listed in the NPPES registry for Diane Singer is (413) 445-4564.
- Does Diane Singer accept Medicare?
- Diane Singer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Diane Singer's NPI active?
- Yes — Diane Singer's NPI (1275554826) is active in the NPPES registry as of the last update on 2016-01-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.