John Thayer, M.D.
NPI 1386628279 · Ophthalmology Physician · Westfield, MA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Thayer, M.D. is a Ophthalmology Physician provider in Westfield, MA (NPI 1386628279).
Provider details
- NPI number
- 1386628279
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 155865 (MA)
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
3,517 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 | 922 | $128 |
| Established Patient Problem Focused Exam of Visual System92012 | 437 | $91 |
| Imaging of Optic Nerve92133 | 432 | $37 |
| Imaging of Retina92134 | 395 | $41 |
| Measurement of Corneal Curvature and Depth of Eye92136 | 249 | $40 |
| Insertion of Drug Delivery Implant Into Tear Duct of Eye68841 | 181 | $16 |
| Removal of Cataract With Insertion of Prosthetic Lens |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 26 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Moxifloxacin Hclbrand: Moxifloxacin | 327 | 213 |
| Latanoprost | 257 | 70 |
| Timolol Maleate | 194 | 61 |
| Brimonidine Tartrate | 162 | 40 |
| Bromfenac Sodium | 126 | 88 |
| Bromfenac Sodiumbrand: Prolensa | 97 | 66 |
| Dorzolamide Hcl | 86 | 22 |
| Ketorolac Tromethamine |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$53 across 3 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
- 2005-12-03
- Last updated
- 2025-05-20
- Certified
- 2025-05-20
Frequently asked questions
- What is John Thayer's NPI number?
- John Thayer's National Provider Identifier (NPI) is 1386628279, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Thayer's specialty?
- John Thayer is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is John Thayer located?
- John Thayer's practice location on file with NPPES is 501 Southampton Rd, Westfield, MA 01085-1592.
- What is John Thayer's phone number?
- The practice phone number listed in the NPPES registry for John Thayer is (413) 572-3000.
- Does John Thayer accept Medicare?
- John Thayer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Thayer's NPI active?
- Yes — John Thayer's NPI (1386628279) is active in the NPPES registry as of the last update on 2025-05-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.