Ennis J. Duffis, M.D.

Primary specialty

Neurology PhysicianTaxonomy code 2084N0400X

License

239113 Issued in MA

Practice address

3300 Main St
3Rd Floor, Suite C&D
Springfield, MA 01107-1112

Phone

(413) 794-5600

Fax

(413) 794-7297

NPI assigned

Jan 16, 2007

Last updated

Mar 19, 2026By 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 3

Addresses

Medicare fee-for-service enrollment

Enrolled in MA, NY2 enrollments

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 2

Specialty

Neurology

Education

Other, 2005

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Baystate Medical Practices IncGroup PAC ID 5991602971, 1,350 clinicians

United Health Services Hospitals, Inc.Group PAC ID 5193610533, 471 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Baystate Medical Center Hospital, Springfield, MA, CCN 220077
• United Health Services Hospitals, Inc Hospital, Binghamton, NY, CCN 330394

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

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, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Baystate Medical Practices, Inc

  • Emergency Medical Services (Emergency Medicine) Physician
  • Springfield, MA
  • NPI 1548205909
  Medicare reassignment Care Compare group NPD
• United Health Services Hospitals, Inc.

  • Multi-Specialty Clinic/Center
  • Johnson City, NY
  • NPI 1962463851
  Medicare reassignment Care Compare group NPD

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

• Baystate Medical Center Inc

  dba Baystate Medical Center

  • General Acute Care Hospital
  • Springfield, MA
  • NPI 1487655064
  Care Compare affiliation
• Baystate Medical Center Inc

  dba Baystate Reference Laboratories

  • Clinical Medical Laboratory
  • Springfield, MA
  • NPI 1568488450

  Hospital

  Care Compare affiliation
• United Health Services Hospitals, Inc.

  • General Acute Care Hospital
  • Binghamton, NY
  • NPI 1518998699
  Care Compare affiliation

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

{
    "created_epoch": "1168905600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1773878400000",
    "number": "1174674295",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "280 CHESTNUT ST",
            "address_2": "2ND FL",
            "city": "SPRINGFIELD",
            "state": "MA",
            "postal_code": "011991001",
            "telephone_number": "413-794-5700"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3300 MAIN ST",
            "address_2": "3RD FLOOR, SUITE C&D",
            "city": "SPRINGFIELD",
            "state": "MA",
            "postal_code": "011071112",
            "telephone_number": "413-794-5600",
            "fax_number": "413-794-7297"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "30 Harrison St Ste 400",
            "address_purpose": "LOCATION",
            "city": "Johnson City",
            "state": "NY",
            "postal_code": "137902176",
            "country_code": "US",
            "telephone_number": "607-763-8008",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "DUFFIS",
        "first_name": "ENNIS",
        "middle_name": "J.",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2007-01-16",
        "last_updated": "2026-03-19",
        "certification_date": "2026-03-19",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2084N0400X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Neurology",
            "state": "MA",
            "license": "239113",
            "primary": true
        },
        {
            "code": "2084N0400X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Neurology",
            "state": "NY",
            "license": "342542",
            "primary": false
        },
        {
            "code": "2084V0102X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Vascular Neurology",
            "state": "MA",
            "license": "239113",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Jessica Dubois
• Bria Dubose
• Lorelei Dubowski
• Derek J. Duclos
• Catherine R Dudley, PA-C
• Kelly Duffy-Clark
• Amanda Kim Duffy, NP
• Samantha Frances Duffy, NP
• Andrea Dufour
• Joshua Ray Dufresne

• Neurology Physician in Springfield, MA
• Providers in Springfield, MA by specialty
• Neurology Physician in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 19, 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.