John Adam Thayer, M.D.

Primary specialty

Ophthalmology PhysicianTaxonomy code 207W00000X

License

155865 Issued in MA

Practice address

501 Southampton Rd
Suite D
Westfield, MA 01085-1592

Phone

(413) 572-3000

NPI assigned

Dec 3, 2005

Sex

Male

Sole proprietor

Yes

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Addresses

Other identifiers 2

Medicare fee-for-service enrollment

Enrolled in MA

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Ophthalmology

Education

University of Michigan Medical School, 1990

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Practice addresses (Care Compare)

Merit-based Incentive Payment System (MIPS)

Final score

62.58 of 100Reported as individual

Quality

100

Improvement activities

0

Cost

75.26

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

• Westfield Eye Center, Inc

  • Ophthalmology Physician
  • Westfield, MA
  • NPI 1649194689
  NPD (past) Authorized official
• Rioux Eye Center, Inc

  • Glaucoma Specialist (Ophthalmology) Physician
  • Greenfield, MA
  • NPI 1508527037
  NPD
• Baystate Medical Practices, Inc

  • Emergency Medical Services (Emergency Medicine) Physician
  • Springfield, MA
  • NPI 1548205909
  NPD (past)

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1133568000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1747699200000",
    "number": "1386628279",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "501 SOUTHAMPTON RD",
            "address_2": "SUITE D",
            "city": "WESTFIELD",
            "state": "MA",
            "postal_code": "010851592",
            "telephone_number": "413-572-3000",
            "fax_number": "413-572-3033"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "501 SOUTHAMPTON RD",
            "address_2": "SUITE D",
            "city": "WESTFIELD",
            "state": "MA",
            "postal_code": "010851592",
            "telephone_number": "413-572-3000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "THAYER",
        "first_name": "JOHN",
        "middle_name": "ADAM",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2005-12-03",
        "last_updated": "2025-05-20",
        "certification_date": "2025-05-20",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207W00000X",
            "taxonomy_group": "",
            "desc": "Ophthalmology",
            "state": "MA",
            "license": "155865",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "3178307",
            "state": "MA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BCBS OF MA ID",
            "identifier": "J18741",
            "state": "MA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Syna Inc
• Meaghan Helene Sypek, OTR/L
• Tapestry Health Systems
• Jehan Tavares-Mathurin, PA-S
• Paul Webster Taylor, D.O.
• The Carson Center
• The Northeast Health Group, Inc.
• The Stop & Shop Supermarket Company, LLC
• Therapeutic Wellness Center, LLC
• Danielle Marie Theriault, BS CEIS

• Ophthalmology Physician in Westfield, MA
• Providers in Westfield, MA by specialty
• Ophthalmology Physician in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 20, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.