Halsey Niles, MD

Primary specialty

Psychiatry PhysicianTaxonomy code 2084P0800X

License

1016586 Issued in MA

Practice address

115 Mill St
Belmont, MA 02478-1048

Phone

(617) 299-9355

NPI assigned

Mar 26, 2021

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

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

Yale University School of Medicine, 2021

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

The McLean Hospital CorporationGroup PAC ID 9436040961, shared by 2 NPIs, 186 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

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.

• Mass General Brigham Medical Group Suburban Massachusetts Inc

  • Family Medicine Physician
  • Newton, MA
  • NPI 1538191218
  Medicare reassignment NPD

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

{
    "created_epoch": "1616716800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1753488000000",
    "number": "1225615057",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "115 MILL ST",
            "city": "BELMONT",
            "state": "MA",
            "postal_code": "024781048",
            "telephone_number": "617-299-9355"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "115 MILL ST",
            "city": "BELMONT",
            "state": "MA",
            "postal_code": "024781048",
            "telephone_number": "617-299-9355"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "55 Fruit St",
            "address_purpose": "LOCATION",
            "city": "Boston",
            "state": "MA",
            "postal_code": "021142696",
            "country_code": "US",
            "telephone_number": "617-726-2000",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "NILES",
        "first_name": "HALSEY",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2021-03-26",
        "last_updated": "2025-07-26",
        "certification_date": "2025-07-26",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2084P0800X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Psychiatry",
            "state": "MA",
            "license": "1016586",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Caitlin Maria Nevins, PH.D.
• Vicky Nguyen
• John Arthur Nichols, PSY.D.
• Margaret Cheskin Nichols, PSYD
• Kabir B Nigam, MD, MRES
• Gil G Noam, ED.D.
• Karen Noble, MSW
• Martin Marvin Norman, PHD
• Judith Norris
• Patricia M Norris, APRN, BC

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

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 26, 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.