Anthony J Tomassoni, M.D.

Primary specialty

Emergency Medicine PhysicianTaxonomy code 207P00000X

License

045057 Issued in CT

Practice address

464 Congress Ave Ste 260
Yale University, Section of Emergencymedicine
New Haven, CT 06519-1361

Phone

(203) 785-4404

Fax

(203) 785-3196

NPI assigned

Oct 4, 2006

Sex

Male

Sole proprietor

Yes

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 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

Emergency MedicineAlso: Medical Toxicology

Education

Rutgers New Jersey Medical School, 1989

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Yale UniversityGroup PAC ID 9436061736, 2,632 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Yale-New Haven Hospital Hospital, New Haven, CT, CCN 070022

Merit-based Incentive Payment System (MIPS)

Final score

87.36 of 100Reported as group

Quality

77.36

Promoting interoperability

100

Improvement activities

40

Cost

74.27

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: atomassoni8561@direct.ynhh.org

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.

• Yale University

  • Anesthesiology Physician
  • New Haven, CT
  • NPI 1205822236

  Emergency Medicine

  Medicare reassignment Care Compare group NPD
• Yale University

  • Durable Medical Equipment & Medical Supplies
  • Fairfield, CT
  • NPI 1548066962
  NPD

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

• Yale New Haven Hospital

  • General Acute Care Hospital
  • New Haven, CT
  • NPI 1336139500
  Care Compare affiliation
• Yale New Haven Hospital

  • General Acute Care Hospital
  • New Haven, CT
  • NPI 1578778726
  Care Compare affiliation

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

{
    "created_epoch": "1159920000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1487740122",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "464 CONGRESS AVE STE 260",
            "address_2": "YALE UNIVERSITY, SECTION OF EMERGENCYMEDICINE",
            "city": "NEW HAVEN",
            "state": "CT",
            "postal_code": "065191361",
            "telephone_number": "203-785-4404",
            "fax_number": "203-785-3196"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "464 CONGRESS AVE STE 260",
            "address_2": "YALE UNIVERSITY, SECTION OF EMERGENCYMEDICINE",
            "city": "NEW HAVEN",
            "state": "CT",
            "postal_code": "065191361",
            "telephone_number": "203-785-4404",
            "fax_number": "203-785-3196"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "TOMASSONI",
        "first_name": "ANTHONY",
        "middle_name": "J",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2006-10-04",
        "last_updated": "2025-09-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "ME",
            "license": "014140",
            "primary": false
        },
        {
            "code": "207PT0002X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine, Medical Toxicology",
            "state": "CT",
            "license": "045057",
            "primary": false
        },
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "CT",
            "license": "045057",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Catherine Tom, BS, PHARMD
• Patrick R Tomak, MD
• Elizabeth Anne Tomanio, DPT, CERT. MDT
• Tomaso Psychological Assessment Services LLC
• Cara Celine Tomaso
• Mary Tomayko, MD
• Sergio F Toni Jr.
• Emily Tonn
• Britt H. Tonnessen, MD
• Denise Tonzola

• Emergency Medicine Physician in New Haven, CT
• Providers in New Haven, CT by specialty
• Emergency Medicine Physician in Connecticut

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 11, 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.