John Scott Martin-Joy, M.D.

Primary specialty

Psychiatry PhysicianTaxonomy code 2084P0800X

License

210262 Issued in MA

Practice address

875 Massachusetts Ave Ste 22
Cambridge, MA 02139-3070

Phone

(617) 417-6902

Fax

(315) 821-8567

NPI assigned

Jan 16, 2007

Last updated

Oct 29, 2025By the provider in NPPES

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

Other names 1

• John Scott Martin Former name

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

Psychiatry

Education

University of Massachusetts Medical School, 1998

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Mount Auburn HospitalGroup PAC ID 2668364183, 8 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: jmartinjoy254513@direct.bilh.masshiway.net

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

• Mount Auburn Hospital

  • Psychiatric Hospital Unit
  • Cambridge, MA
  • NPI 1649254491
  Medicare reassignment Care Compare group NPD

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

{
    "created_epoch": "1168905600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1761696000000",
    "number": "1023169141",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "875 MASSACHUSETTS AVE STE 22",
            "city": "CAMBRIDGE",
            "state": "MA",
            "postal_code": "021393070",
            "telephone_number": "617-417-6902",
            "fax_number": "315-821-8567"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "875 MASSACHUSETTS AVE STE 22",
            "city": "CAMBRIDGE",
            "state": "MA",
            "postal_code": "021393070",
            "telephone_number": "617-417-6902",
            "fax_number": "315-821-8567"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MARTIN-JOY",
        "first_name": "JOHN",
        "middle_name": "SCOTT",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2007-01-16",
        "last_updated": "2025-10-29",
        "certification_date": "2025-10-29",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2084P0800X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Psychiatry",
            "state": "MA",
            "license": "210262",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "JOHN",
            "last_name": "MARTIN",
            "middle_name": "SCOTT",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

• Gail Marsh, MSW LICSW
• Gina Marie Marsh, PT
• Cole Martens, MD
• Martha N Martents, M.D.
• Paul M Martha, M.D.
• Esther Dahlia Martin, OTR
• Jessica Nicole Martin
• Mary Martin
• Michele Antoinette Martin, RN
• Shanice Martin, PSYD

• Psychiatry Physician in Cambridge, MA
• Providers in Cambridge, MA by specialty
• Psychiatry Physician in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 29, 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.