Karen P McKay, PA

Primary specialty

Physician AssistantTaxonomy code 363A00000X

License

177 Issued in MA

Practice address

435 Furnace St
Marshfield, MA 02050-2332

Phone

(781) 837-7200

Fax

(781) 837-7255

NPI assigned

Nov 3, 2005

Sex

Female

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

Medicare enrollment (NPD)

Enrolled

Credentials

Physician Assistant

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: kmckay23379@direct.atrius.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.

• Atrius Health, Inc.

  • Internal Medicine Physician
  • Boston, MA
  • NPI 1871639914
  Medicare reassignment
• Carewell Urgent Care Centers of Ma, P.C

  • Urgent Care Clinic/Center
  • South Dennis, MA
  • NPI 1740543214
  Medicare reassignment
• Healthcare South PC

  • Pediatrics Physician
  • Rockland, MA
  • NPI 1396726006
  Medicare reassignment
• Urgent Care Centers of Central Massachusetts, LLC

  • Urgent Care Clinic/Center
  • Marlborough, MA
  • NPI 1497286280
  Medicare reassignment
• Atrius Health, Inc.

  • Internal Medicine Physician
  • Beverly, MA
  • NPI 1114265634

  Physician Assistant

  NPD
• Atrius Health, Inc.

  • Internal Medicine Physician
  • Burlington, MA
  • NPI 1225183726

  Physician Assistant

  NPD

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

{
    "created_epoch": "1130976000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1785888000000",
    "number": "1396736765",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "302 WEYMOUTH ST STE 202",
            "city": "ROCKLAND",
            "state": "MA",
            "postal_code": "023701172",
            "telephone_number": "781-803-2786",
            "fax_number": "781-812-1631"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "435 FURNACE ST",
            "city": "MARSHFIELD",
            "state": "MA",
            "postal_code": "020502332",
            "telephone_number": "781-837-7200",
            "fax_number": "781-837-7255"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "484 Route 134",
            "address_purpose": "LOCATION",
            "city": "South Dennis",
            "state": "MA",
            "postal_code": "026603423",
            "country_code": "US",
            "telephone_number": "508-694-7901",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "500 Lincoln St",
            "address_purpose": "LOCATION",
            "city": "Worcester",
            "state": "MA",
            "postal_code": "016051916",
            "country_code": "US",
            "telephone_number": "774-420-2111",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "MCKAY",
        "first_name": "KAREN",
        "middle_name": "P",
        "name_prefix": "Mrs.",
        "credential": "PA",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2005-11-03",
        "last_updated": "2026-08-05",
        "certification_date": "2026-08-05",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "MA",
            "license": "177",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Kathleen Ann McAleer, M.S.W.
• Lauren McClain, LCSW
• Janet L McDonald
• Ruth Kathryn McDonough, DC
• Caily Marie McGrath
• Darlene E. McKenney, LMT/ PTA
• John P McLaughlin Jr., DPM
• Thomas D. McManus, R.PH.
• McNamara Educational Services
• Katherine McNeil

• Physician Assistant in Marshfield, MA
• Providers in Marshfield, MA by specialty
• Physician Assistant in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 5, 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.