Michael Osullivan, DO

Primary specialty

Psychiatry PhysicianTaxonomy code 2084P0800X

License

288395 Issued in MA

Practice address

79 Masonic St
Northampton, MA 01060-3008

Phone

(413) 483-3282

Fax

(413) 679-5822

NPI assigned

Jun 7, 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 CT

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 New England, College of Osteo Medicine, 2021

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Natchaug Hospital, IncGroup PAC ID 5395648737, 34 clinicians

The William W Backus HospitalGroup PAC ID 0749170645, 248 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Osteopathy

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.

• Natchaug Hospital, Inc.

  • Psychiatric Hospital
  • Mansfield Center, CT
  • NPI 1295811321
  Medicare reassignment Care Compare group NPD
• The William W Backus Hospital

  • General Acute Care Hospital
  • Norwich, CT
  • NPI 1467517235
  Medicare reassignment Care Compare group NPD
• Windham Community Memorial Hospital, Inc.

  • General Acute Care Hospital
  • Willimantic, CT
  • NPI 1023191467
  Medicare reassignment NPD
• William W Backus Hospital

  • Psychiatric Hospital Unit
  • Norwich, CT
  • NPI 1730243536
  NPD

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

{
    "created_epoch": "1623024000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1788998400000",
    "number": "1043887300",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "79 MASONIC ST",
            "city": "NORTHAMPTON",
            "state": "MA",
            "postal_code": "010603008",
            "telephone_number": "413-483-3282",
            "fax_number": "413-679-5822"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "79 MASONIC ST",
            "city": "NORTHAMPTON",
            "state": "MA",
            "postal_code": "010603008",
            "telephone_number": "413-483-3282",
            "fax_number": "413-679-5822"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "OSULLIVAN",
        "first_name": "MICHAEL",
        "name_prefix": "Dr.",
        "credential": "DO",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2021-06-07",
        "last_updated": "2026-09-10",
        "certification_date": "2026-09-10",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2084P0800X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Psychiatry",
            "state": "MA",
            "license": "288395",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Digno Ortiz Jr.
• Tracy C. Osbahr, M.A., CCC-S
• Melissa Osborne, RN
• Jessica Osit
• Laurie Ostendorf, PSY.D.
• Katelyn Otto
• Dennis W. Owens, M.D.
• Owl and Oak Counseling LLC
• Sarah Pacheco
• Louis V. Pacilio, MD

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

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