William Griffiths III, PA-C

Primary specialty

Medical Physician AssistantTaxonomy code 363AM0700X

Practice address

495 Western Ave
Brighton, MA 02135-1007

Phone

(617) 783-0500

Fax

(617) 562-1398

NPI assigned

Jul 3, 2023

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

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: No

Green means eligible to order or refer.

Enrollment records 1

Specialty

Physician Assistant

Education

Other, 2023

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Emerson Practice Associates, IncGroup PAC ID 8123188117, 247 clinicians

Mill City Medical Group LTDGroup PAC ID 3577507797, 19 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Emerson Hospital - Hospital, W Concord, MA, CCN 220084
• Lowell General Hospital Hospital, Lowell, MA, CCN 220063

Medicare enrollment (NPD)

Enrolled

Credentials

Physician Assistant

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: wgriffiths46280@direct.ctc.masshiway.net
• Direct secure messaging: griffiths.william.epa@direct.partners.masshiway.net

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.

• Mill City Medical Group LTD

  • Internal Medicine Physician
  • Lowell, MA
  • NPI 1053346692
  Medicare reassignment Care Compare group NPD
• Emerson Practice Associates, Inc.

  • Internal Medicine Physician
  • Concord, MA
  • NPI 1508020199
  Medicare reassignment Care Compare group
• Charles River Community Health Inc

  • Federally Qualified Health Center (FQHC)
  • Brighton, MA
  • NPI 1487664884
  Medicare reassignment
• Charles River Community Health, Inc

  • Federally Qualified Health Center (FQHC)
  • Allston, MA
  • NPI 1134306368
  NPD

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Emerson Hospital

  • General Acute Care Hospital
  • Concord, MA
  • NPI 1922103357
  Care Compare affiliation
• The Lowell General Hospital

  dba Lowell General Hospital

  • General Acute Care Hospital
  • Lowell, MA
  • NPI 1407804669
  Care Compare affiliation

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

{
    "created_epoch": "1688342400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1775779200000",
    "number": "1841977683",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "495 WESTERN AVE",
            "city": "BRIGHTON",
            "state": "MA",
            "postal_code": "021351007",
            "telephone_number": "617-783-0500"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "495 WESTERN AVE",
            "city": "BRIGHTON",
            "state": "MA",
            "postal_code": "021351007",
            "telephone_number": "617-783-0500",
            "fax_number": "617-562-1398"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GRIFFITHS",
        "first_name": "WILLIAM",
        "name_prefix": "Mr.",
        "name_suffix": "III",
        "credential": "PA-C",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2023-07-03",
        "last_updated": "2026-04-10",
        "certification_date": "2026-04-10",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363AM0700X",
            "taxonomy_group": "",
            "desc": "Physician Assistant, Medical",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Richard Green
• Danielle Nycole Greenaway, LPN
• Greenleaf Pharmacy LLC (Melvin Rx)
• Greenleaf Pharmacy LLC LTC
• Cory Greguske, DO
• Andrew Grimminck, BCBA, LBA
• Joanna M Gross, PA-C
• Growing Light Psychiatry and Wellness, PLLC
• Angela Groysman, FNP
• Zoe Gruskay, LICSW

• Medical Physician Assistant in Brighton, MA
• Providers in Brighton, MA by specialty
• Medical Physician Assistant in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 10, 2026; 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.