William Andrew Arthur Karalis, DO

Primary specialty

Emergency Medicine PhysicianTaxonomy code 207P00000X

License

335875 Issued in NY

Practice address

300 Community Dr
Manhasset, NY 11030-3816

Phone

(516) 562-3047

NPI assigned

Mar 30, 2022

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 NY, MA2 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 New England, College of Osteo Medicine, 2022

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Cape Cod Emergency Associates LLPGroup PAC ID 5597135301, 35 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Cape Cod Hospital Hospital, Hyannis, MA, CCN 220012

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Osteopathy

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: wkaralis2390577@direct.trinity-health.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.

• Cape Cod Emergency Associates LLP

  • Emergency Medicine Physician
  • Hyannis, MA
  • NPI 1396462958
  Medicare reassignment Care Compare group
• North Shore-Lij Medical PC

  • Urology Physician
  • Great Neck, NY
  • NPI 1053688572

  Emergency Medicine

  Medicare reassignment NPD
• Urgi Center Medical Group

  • Urgent Care Clinic/Center
  • Sandwich, MA
  • NPI 1902146798
  Medicare reassignment

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

• Cape Cod Hospital Inc

  • General Acute Care Hospital
  • Hyannis, MA
  • NPI 1114984671
  Care Compare affiliation

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

{
    "created_epoch": "1648598400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1755043200000",
    "number": "1891435731",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "300 COMMUNITY DR",
            "city": "MANHASSET",
            "state": "NY",
            "postal_code": "110303816",
            "telephone_number": "516-562-3047",
            "fax_number": "516-562-3569"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "300 COMMUNITY DR",
            "city": "MANHASSET",
            "state": "NY",
            "postal_code": "110303816",
            "telephone_number": "516-562-3047"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "KARALIS",
        "first_name": "WILLIAM",
        "middle_name": "ANDREW ARTHUR",
        "credential": "DO",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2022-03-30",
        "last_updated": "2025-08-13",
        "certification_date": "2025-08-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "NY",
            "license": "335875",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Lawrence J Kanner, MD
• Deborah R Kaplan, LCSW
• Jeremy David Kaplitt, MD
• Michael Dimitrios Karachalios, M.D.
• Jay Karajgikar
• John C Karaptis, RPA-C
• Douglas A Karman, NP
• Ava Therese Karnish
• Neslihan Kasap
• Kavita Kasat, MD

• Emergency Medicine Physician in Manhasset, NY
• Providers in Manhasset, NY by specialty
• Emergency Medicine Physician in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 13, 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.