Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

John Adam Thayer, MD

Individual provider Ophthalmology Physician · NPI 1386628279

John Adam Thayer, MD is an Ophthalmology in Westfield, Massachusetts. Graduated from University of Michigan Medical School in 1990, 36 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
36
Trained at
University of Michigan Medical School
Licensed in
MA
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

501 Southampton Rd Ste D
Westfield, MA 01085-1592
Phone: (413) 572-3000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Ophthalmology Physician (primary) Taxonomy 207W00000X · Licence 155865 (MA)

Record details

NPI number1386628279
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedDecember 3, 2005
Last updated in NPPESMay 20, 2025
Certification dateMay 20, 2025
Mailing address501 Southampton Rd, Suite D, Westfield, MA 01085-1592

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyOPHTHALMOLOGY
Medical schoolUNIVERSITY OF MICHIGAN MEDICAL SCHOOL
Graduated 1990 (36 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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