Margaret J Layo, APRN FNP-BC

Primary specialty

Family Nurse PractitionerTaxonomy code 363LF0000X

License

RN2326899 Issued in MA

Practice address

480 Pleasant St Ste A300
Watertown, MA 02472-2463

Phone

(617) 926-9000

Fax

(617) 926-7053

NPI assigned

Nov 3, 2020

Sex

Female

Sole proprietor

No

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

Specialties & licenses 3

Addresses

Other identifiers 1

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

Nurse Practitioner

Education

Other, 2020

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Mount Auburn Professional Services IncGroup PAC ID 6103725031, 229 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Mount Auburn Hospital Hospital, Cambridge, MA, CCN 220002
• Lahey Hospital & Medical Center, Burlington Hospital, Burlington, MA, CCN 220171

Medicare enrollment (NPD)

Enrolled

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: mlayo97417@direct.bilh.masshiway.net
• FHIR API: https://api.platform.athenahealth.com/86/brand/1/csg/1/fhir/r4

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.

• Mount Auburn Professional Services Inc

  • Internal Medicine Physician
  • Cambridge, MA
  • NPI 1992750996
  Medicare reassignment Care Compare group NPD
• Mt Auburn Professional Services

  • Internal Medicine Physician
  • Cambridge, MA
  • NPI 1013375203
  NPD
• Well Life Medical, PC

  • Internal Medicine Physician
  • Salem, MA
  • NPI 1669460903
  NPD

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

• Lahey Clinic Hospital, Inc.

  • General Acute Care Hospital
  • Burlington, MA
  • NPI 1558392563
  Care Compare affiliation
• Mount Auburn Hospital

  • General Acute Care Hospital
  • Cambridge, MA
  • NPI 1689670259
  Care Compare affiliation

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

{
    "created_epoch": "1604361600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1744070400000",
    "number": "1184225401",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "330 MT AUBURN ST",
            "address_2": "PARSONS 2",
            "city": "CAMBRIDGE",
            "state": "MA",
            "postal_code": "021385597",
            "telephone_number": "617-926-9000",
            "fax_number": "617-926-7053"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "480 PLEASANT ST STE A300",
            "city": "WATERTOWN",
            "state": "MA",
            "postal_code": "024722463",
            "telephone_number": "617-926-9000",
            "fax_number": "617-926-7053"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "2 1st Ave Ste 215",
            "address_purpose": "LOCATION",
            "city": "Peabody",
            "state": "MA",
            "postal_code": "019604962",
            "country_code": "US",
            "telephone_number": "978-740-2300",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "LAYO",
        "first_name": "MARGARET",
        "middle_name": "J",
        "credential": "APRN FNP-BC",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2020-11-03",
        "last_updated": "2025-04-08",
        "certification_date": "2025-03-25",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363L00000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner",
            "state": "MA",
            "license": "RN2326899",
            "primary": false
        },
        {
            "code": "363LP2300X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Primary Care",
            "state": "MA",
            "license": "RN2326899",
            "primary": false
        },
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "MA",
            "license": "RN2326899",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "110195702A",
            "state": "MA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Susan M Lattanzi, PT
• Jaclyn Lavigne, LICSW
• Alexandra Lavoie, OTR/L
• Ryan Lavoie
• Jancie Webb Lawrence, NP-C
• Leah'S Doula Support
• Lisa Leblanc, NP
• Madeline Jackson Lee
• Marianne Y Lee, PHARMD
• Dina Iliana Leeman, OTR/L, MS, CBIS, LSV

• Family Nurse Practitioner in Watertown, MA
• Providers in Watertown, MA by specialty
• Family Nurse Practitioner in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 8, 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.