Ryan Patrick Casarella, M.D.

Primary specialty

Emergency Medicine PhysicianTaxonomy code 207P00000X

License

314567-01 Issued in NY

Practice address

5 Perryridge Rd
Greenwich, CT 06830-4697

Phone

(203) 863-3000

NPI assigned

Apr 4, 2016

Sex

Male

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in NY, CT2 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

Emergency Medicine

Education

University of Massachusetts Medical School, 2016

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Greenwich HospitalGroup PAC ID 3678476710, 78 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Greenwich Hospital Association - Hospital, Greenwich, CT, CCN 070018
• Westchester Medical Center Hospital, Valhalla, NY, CCN 330234

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: rcasarella708069@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.

• Greenwich Hospital

  • General Acute Care Hospital
  • Greenwich, CT
  • NPI 1609846088
  Medicare reassignment Care Compare group NPD
• Physicians Medical Associates New York PC

  • Emergency Medicine Physician
  • Syracuse, NY
  • NPI 1073386421
  Medicare reassignment NPD
• New York Physician Associates of Medicine PC

  • Emergency Medicine Physician
  • Valhalla, NY
  • NPI 1669329082
  Medicare reassignment
• Greenwich Hospital

  • Community Based Hospice Care Agency
  • Stanford, CT
  • NPI 1073637724
  NPD
• Physicians Medical Associates New York PC

  • Emergency Medicine Physician
  • Poughkeepsie, NY
  • NPI 1487409702
  NPD

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

• Greenwich Hospital

  • General Acute Care Hospital
  • Greenwich, CT
  • NPI 1609846088
  Care Compare affiliation
• Westchester County Health Care Corporation

  dba Westchester Medical Center

  • General Acute Care Hospital
  • Valhalla, NY
  • NPI 1932280666
  Care Compare affiliation

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

{
    "created_epoch": "1459728000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1739232000000",
    "number": "1740643998",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "5 PERRYRIDGE RD",
            "city": "GREENWICH",
            "state": "CT",
            "postal_code": "068304697",
            "telephone_number": "203-863-3000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "5 PERRYRIDGE RD",
            "city": "GREENWICH",
            "state": "CT",
            "postal_code": "068304697",
            "telephone_number": "203-863-3000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "CASARELLA",
        "first_name": "RYAN",
        "middle_name": "PATRICK",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2016-04-04",
        "last_updated": "2025-02-11",
        "certification_date": "2025-02-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "NV",
            "license": "19025",
            "primary": false
        },
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "NY",
            "license": "314567-01",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Laurel Carey
• Lauren Carlino-Bradley
• Michael James Carney, DPT
• Dzwinka Carroll, MD
• Lauren W. Carton, M.D.
• Kaila Anne Cashman, L.C.S.W.
• Orla Cashman, PHD, LCSW
• Cristina Castagna, PT
• Melissa Castillo, PHD
• Brenda Sambrano Cataylo, REGISTERED NURSE

• Emergency Medicine Physician in Greenwich, CT
• Providers in Greenwich, 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 Feb 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.