NPIMap

Individual provider Active NPI

William Chase Madsen, DO

  • Emergency Medicine Physician
  • Richfield, UT
National Provider Identifier
1013545433
Registry record updated Nov 17, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Emergency Medicine PhysicianTaxonomy code 207P00000X
License
14250379-1204 Issued in UT
Practice address
1000 N Main St Ste a
Richfield, UT 84701-2069
Phone
(435) 893-0580
NPI assigned
Mar 31, 2020
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Nov 17, 2025

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Emergency Medicine Physician 207P00000X DO3341 NV
Emergency Medicine Physician 207P00000X 14250379-1204 UT Primary

Addresses

Primary practice location

1000 N Main St Ste a
Richfield, UT 84701-2069

Mailing address

PO Box 27128
Salt Lake City, UT 84127-0128

Other practice location 1

1800 W Charleston Blvd
Las Vegas, NV 89102-2329
Phone (702) 383-1958

Electronic endpoints 1

TypeEndpointUseAffiliation
CONNECT URL https://esmd.officeally.io:8291/Gateway/DocumentSubmission/2_0/NhinService/XDRRequest_Service Other Bluemark LLC/ Office Ally

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in NV, UT2 enrollments
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 2

Enrollment IDStateProvider typePAC IDDetails
I20230821002190 NV Practitioner - Emergency Medicine 1759743958 Reassigns benefits to 2 organizations
I20251106003506 UT Practitioner - Emergency Medicine 1759743958 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Emergency Medicine
Education
Lake Erie College of Osteopathic Medicine, Erie, 2020
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Ihc Health Services IncGroup PAC ID 1850209420, 3,948 clinicians
University Medical Center of Southern NevadaGroup PAC ID 7315934429, 388 clinicians

Practice addresses (Care Compare)

1000 N Main
Sevier Valley Hospital Physicians GRP
Richfield, UT 84701-1843
Phone (435) 893-4100

1000 N Main St
Suite a
Richfield, UT 84701-2069
Phone (435) 893-0580

1800 W Charleston Blvd
Las Vegas, NV 89102-2329
Phone (702) 383-2000

Hospital & facility affiliations

  • University Medical Center Hospital, Las Vegas, NV, CCN 290007
  • Intermountain Health Sevier Valley Hospital Hospital, Richfield, UT, CCN 460026

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Osteopathy

State licenses

LicenseStateTypeSpecialty
14250379-1204UTMDEmergency Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Ihc Health Services Inc CurrentSince Nov 30, 2025 Accepting new patients
Sound Physicians Emergency Medicine of Nevada Bessler PLLC Emergency Medicine CurrentSince Jul 10, 2023 Accepting new patients
Ihc Health Services Inc Current Accepting new patients
Ihc Health Services, Inc. CurrentSince Nov 30, 2025 Accepting new patients
University Medical Center of Southern Nevada CurrentSince Jul 1, 2024 Accepting new patients
University Medical Center of Southern Nevada CurrentSince Jul 1, 2024 Accepting new patients

Locations

1800 W Charleston Blvd
Las Vegas, NV 89102
Phone (702) 207-8253

2375 E Prater Way
Sparks, NV 89434
Phone (775) 331-7000

700 S Highway 99
Ste 3
Fillmore, UT 84631
Phone (435) 743-5555

1000 N Main St
Ste A
Richfield, UT 84701
Phone (435) 893-0580

1000 N Main St
Richfield, UT 84701
Phone (435) 893-4100

1300 SE Cardinal Ct
Ste 190
Vancouver, WA 98683
Phone (360) 448-4479

Organizations & group practices 7

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.

Hospital & facility affiliations 13

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

View all 13

NPI Registry JSON

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

{
    "created_epoch": "1585612800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1763337600000",
    "number": "1013545433",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 27128",
            "city": "SALT LAKE CITY",
            "state": "UT",
            "postal_code": "841270128"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1000 N MAIN ST STE A",
            "city": "RICHFIELD",
            "state": "UT",
            "postal_code": "847012069",
            "telephone_number": "435-893-0580"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1800 W Charleston Blvd",
            "address_purpose": "LOCATION",
            "city": "Las Vegas",
            "state": "NV",
            "postal_code": "891022329",
            "country_code": "US",
            "telephone_number": "702-383-1958",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "MADSEN",
        "first_name": "WILLIAM",
        "middle_name": "CHASE",
        "credential": "DO",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2020-03-31",
        "last_updated": "2025-11-17",
        "certification_date": "2025-11-17",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "NV",
            "license": "DO3341",
            "primary": false
        },
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "UT",
            "license": "14250379-1204",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "CONNECT",
            "endpointTypeDescription": "CONNECT URL",
            "endpoint": "https://esmd.officeally.io:8291/Gateway/DocumentSubmission/2_0/NhinService/XDRRequest_Service",
            "affiliation": "Y",
            "endpointDescription": "2.16.840.1.113883.3.2019.3",
            "affiliationName": "Bluemark LLC/ Office Ally",
            "use": "OTHER",
            "useDescription": "Other",
            "useOtherDescription": "CMS esMD eMDR",
            "address_1": "1300 SE Cardinal Ct Ste 190",
            "city": "Vancouver",
            "state": "WA",
            "country_code": "US",
            "postal_code": "986839683",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

Other providers in Richfield, UT

Sources for this page

Verify at the official NPI Registry.