Dawn E. Williamson, M.D.

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

190633 Issued in NY

Practice address

455 E Bay Dr
Long Beach, NY 11561-2301

Phone

(516) 897-1100

Fax

(516) 897-1106

NPI assigned

Jan 12, 2006

Sex

Female

Sole proprietor

Yes

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

Specialties & licenses 2

Addresses

Other identifiers 2

Medicare fee-for-service enrollment

Enrolled in NY

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

Merit-based Incentive Payment System (MIPS)

Final score

86.46 of 100Reported as group

Quality

57.32

Promoting interoperability

84

Improvement activities

40

Cost

80.25

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

Networks

• Healthfirst Medicare Network H9678
• Healthfirst Medicare Network H1722
• Healthfirst Medicare Network H5989
• Healthfirst Medicare Network H3359

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.

• Island Emergency Medical Services, P.C.

  • Emergency Medicine Physician
  • Far Rockaway, NY
  • NPI 1639160385
  Medicare reassignment NPD
• Nassau Health Care Corporation

  • General Acute Care Hospital
  • East Meadow, NY
  • NPI 1902822992
  Medicare reassignment NPD
• Nes Medical Services of New York PC

  • Emergency Medicine Physician
  • Bath, NY
  • NPI 1215455191
  Medicare reassignment NPD
• North Shore-Lij Medical PC

  • Urology Physician
  • Great Neck, NY
  • NPI 1053688572

  Emergency Medicine

  Medicare reassignment NPD
• South Nassau Physician Group PC

  • Emergency Medicine Physician
  • Oceanside, NY
  • NPI 1922460542
  Medicare reassignment
• Nassau Health Care Corporation

  • General Acute Care Hospital
  • East Meadow, NY
  • NPI 1730530940
  NPD
• Nassau Health Care Corporation

  • General Acute Care Hospital
  • East Meadow, NY
  • NPI 1982620977
  NPD
• Nes Medical Services of New York PC

  • Emergency Medicine Physician
  • Elmira, NY
  • NPI 1831742816
  NPD
• North Shore - Lij Medical PC

  • Internal Medicine Physician
  • New Hyde Park, NY
  • NPI 1790043479
  NPD

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

{
    "created_epoch": "1137024000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1073592549",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2 ASTRO PL",
            "city": "DIX HILLS",
            "state": "NY",
            "postal_code": "117465707",
            "telephone_number": "631-848-8064",
            "fax_number": "631-421-2442"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "455 E BAY DR",
            "city": "LONG BEACH",
            "state": "NY",
            "postal_code": "115612301",
            "telephone_number": "516-897-1100",
            "fax_number": "516-897-1106"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WILLIAMSON",
        "first_name": "DAWN",
        "middle_name": "E.",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2006-01-12",
        "last_updated": "2025-09-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "NY",
            "license": "190633",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "NY",
            "license": "190633",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BLUECROSS BLUESHIELD",
            "identifier": "063AL1",
            "state": "NY"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "01604993",
            "state": "NY"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• David Wheelock, LCSW
• Greg R. Wiegmann, RPH.
• Susan Theresa Wihnyk, RN
• William Fastenberg MD PC
• Wendy Williams, FNP
• Elizabeth Williamson
• Shakiera Wilson, RN, BSN
• Ashley Winn
• Winthrop Community Medical Affiliates, P.C.
• Lisa Marie Wisel, MS,ADTR-LCAT

• Internal Medicine Physician in Long Beach, NY
• Providers in Long Beach, NY by specialty
• Internal Medicine Physician in New York

• 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.