Ryan David Koski-Vacirca, MD, MPH

Primary specialty

Emergency Medicine PhysicianTaxonomy code 207P00000X

License

80654 Issued in CT

Practice address

20 York St
New Haven, CT 06510-3220

Phone

(203) 688-4242

NPI assigned

May 5, 2021

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

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 Medicine

Education

Wake Forest University School of Medicine, 2021

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Yale UniversityGroup PAC ID 9436061736, 2,632 clinicians

Bridgeport HospitalGroup PAC ID 2062312598, 134 clinicians

Greenwich HospitalGroup PAC ID 3678476710, 78 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Yale-New Haven Hospital Hospital, New Haven, CT, CCN 070022
• Bridgeport Hospital Hospital, Bridgeport, CT, CCN 070010
• Greenwich Hospital Association - Hospital, Greenwich, CT, CCN 070018

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: rkoskivacirca515210@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.

• Bridgeport Hospital

  • General Acute Care Hospital
  • Bridgeport, CT
  • NPI 1649260845
  Medicare reassignment Care Compare group NPD
• Greenwich Hospital

  • General Acute Care Hospital
  • Greenwich, CT
  • NPI 1609846088
  Medicare reassignment Care Compare group NPD
• Yale University

  • Anesthesiology Physician
  • New Haven, CT
  • NPI 1205822236

  Emergency Medicine

  Medicare reassignment Care Compare group NPD
• Bridgeport Hospital

  • General Acute Care Hospital
  • Milford, CT
  • NPI 1619553021
  NPD
• Bridgeport Hospital

  • General Acute Care Hospital
  • Milford, CT
  • NPI 1891376810
  NPD
• Greenwich Hospital

  • Community Based Hospice Care Agency
  • Stanford, CT
  • NPI 1073637724
  NPD
• Yale University

  • Adult Mental Health Clinic/Center
  • Hamden, CT
  • NPI 1134391824
  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.

• Bridgeport Hospital

  • General Acute Care Hospital
  • Bridgeport, CT
  • NPI 1649260845
  Care Compare affiliation
• Bridgeport Hospital

  • General Acute Care Hospital
  • Bridgeport, CT
  • NPI 1992910152
  Care Compare affiliation
• Greenwich Hospital

  • General Acute Care Hospital
  • Greenwich, CT
  • NPI 1609846088
  Care Compare affiliation
• 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": "1620172800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1751673600000",
    "number": "1386227403",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "464 CONGRESS AVE",
            "city": "NEW HAVEN",
            "state": "CT",
            "postal_code": "065191361",
            "telephone_number": "203-688-4242"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "20 YORK ST",
            "city": "NEW HAVEN",
            "state": "CT",
            "postal_code": "065103220",
            "telephone_number": "203-688-4242"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "KOSKI-VACIRCA",
        "first_name": "RYAN",
        "middle_name": "DAVID",
        "name_prefix": "Dr.",
        "credential": "MD, MPH",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2021-05-05",
        "last_updated": "2025-07-05",
        "certification_date": "2025-07-05",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "CT",
            "license": "80654",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Laura Kelley Kos, CPNP
• Andrea Dingman Kosack, PA-C
• Boonsri Kosarussavadi, MD
• Kalarickad Maria Koshy, MD
• Katherine Anne Kosiv, MD
• Christina Lynn Koskinas, PA-C
• Kourtney J Koslosky, M.D.
• Spyridon Kostantinis
• Piotr Kostyk, MD
• Ajay K Kota, M.D.

• 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 Jul 5, 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.