William I Boswell IV, PA/AA

Primary specialty

Anesthesiologist AssistantTaxonomy code 367H00000X

License

615-17 Issued in WI

Practice address

600 Highland Ave
Madison, WI 53792-0001

Phone

(608) 263-8100

NPI assigned

Aug 15, 2006

Sex

Male

Sole proprietor

No

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

Specialties & licenses 3

Addresses

Medicare fee-for-service enrollment

Enrolled in GA, CO, AL, MO, WI5 enrollments

Enrollment records 5

Specialty

Anesthesiology Assistant

Education

Emory University School of Medicine, 1993

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Poudre Valley Medical Group LLCGroup PAC ID 9638208549, 2,425 clinicians

Ozark Anesthesia Associates IncGroup PAC ID 1850290149, 86 clinicians

US Anesthesia Partners of Colorado IncGroup PAC ID 6002072055, 472 clinicians

University of Wisconsin Medical Foundation IncGroup PAC ID 6608785464, 2,537 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• University of Wi Hospitals & Clinics Authority Hospital, Madison, WI, CCN 520098
• Cox Medical Centers Hospital, Springfield, MO, CCN 260040
• Uch-Memorial Health System Hospital, Colorado Springs, CO, CCN 060022
• Adventhealth Castle Rock Hospital, Castle Rock, CO, CCN 060125
• The Medical Center of Aurora & South Hospital Hospital, Aurora, CO, CCN 060100

Medicare enrollment (NPD)

Enrolled

Credentials

Associate of Arts, Physician Assistant

State licenses

Practice roles

Locations

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.

• University of Wisconsin Medical Foundation, Inc

  • Multi-Specialty Clinic/Center
  • Middleton, WI
  • NPI 1598784555
  Medicare reassignment Care Compare group NPD
• Ozark Anesthesia Associates, Inc.

  • Anesthesiology Physician
  • Springfield, MO
  • NPI 1831109586
  Medicare reassignment Care Compare group NPD
• Poudre Valley Medical Group, LLC

  • General Practice Physician
  • Loveland, CO
  • NPI 1225356868

  Anesthesiology

  Medicare reassignment Care Compare group NPD
• US Anesthesia Partners of Colorado Inc.

  • Anesthesiology Physician
  • Greenwood Village, CO
  • NPI 1922365782
  Medicare reassignment Care Compare group NPD
• American Anesthesiology Associates of Georgia, LLC

  • Anesthesiology Physician
  • Stone Mountain, GA
  • NPI 1528068673
  Medicare reassignment NPD
• Anesthesia Associates of East Alabama LLC

  • Anesthesiology Physician
  • Opelika, AL
  • NPI 1245201771
  Medicare reassignment NPD
• Northlake Anesthesia Professionals, LLC

  • Anesthesiology Physician
  • Atlanta, GA
  • NPI 1982637419
  Medicare reassignment NPD
• Physician Anesthesia Services PC

  • Anesthesiology Physician
  • Golden, CO
  • NPI 1861476590
  Medicare reassignment NPD
• University of Wisconsin Medical Foundation, Inc

  • Health Educator
  • Madison, WI
  • NPI 1487414082
  NPD
• Poudre Valley Medical Group, LLC

  • General Practice Physician
  • Loveland, CO
  • NPI 1366763260
  NPD
• Advanced Anesthesia Associates, PC

  • Anesthesiology Physician
  • Covington, GA
  • NPI 1649260738
  NPD (past)
• Anesthesia Associates of Macon LLP

  • Anesthesiology Physician
  • Macon, GA
  • NPI 1083720478
  NPD (past)

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

• University of Wisconsin Hospitals and Clinics Authority

  • General Acute Care Hospital
  • Madison, WI
  • NPI 1922043744
  Care Compare affiliation
• HCA Healthone LLC

  • General Acute Care Hospital
  • Aurora, CO
  • NPI 1659327013
  Care Compare affiliation
• HCA Healthone LLC

  • General Acute Care Hospital
  • Aurora, CO
  • NPI 1720666142
  Care Compare affiliation
• HCA Healthone LLC

  • General Acute Care Hospital
  • Aurora, CO
  • NPI 1801474226
  Care Compare affiliation
• HCA-Healthone LLC

  • General Acute Care Hospital
  • Englewood, CO
  • NPI 1437713856
  Care Compare affiliation
• HCA-Healthone, LLC

  • General Acute Care Hospital
  • Aurora, CO
  • NPI 1336868017
  Care Compare affiliation
• HCA-Healthone, LLC

  • General Acute Care Hospital
  • Centennial, CO
  • NPI 1396323721
  Care Compare affiliation
• HCA-Healthone, LLC

  • General Acute Care Hospital
  • Centennial, CO
  • NPI 1407577315
  Care Compare affiliation
• HCA-Healthone, LLC

  • Psychiatric Hospital
  • Aurora, CO
  • NPI 1437795424
  Care Compare affiliation
• HCA-Healthone, LLC

  • General Acute Care Hospital
  • Denver, CO
  • NPI 1528604808
  Care Compare affiliation
• HCA-Healthone, LLC

  • General Acute Care Hospital
  • Centennial, CO
  • NPI 1609412980
  Care Compare affiliation
• HCA-Healthone, LLC

  • General Acute Care Hospital
  • Littleton, CO
  • NPI 1780262105
  Care Compare affiliation

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

{
    "created_epoch": "1155600000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1770076800000",
    "number": "1457464679",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "7974 UW HEALTH CT",
            "city": "MIDDLETON",
            "state": "WI",
            "postal_code": "535625531"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "600 HIGHLAND AVE",
            "city": "MADISON",
            "state": "WI",
            "postal_code": "537920001",
            "telephone_number": "608-263-8100"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1400 E Boulder St",
            "address_purpose": "LOCATION",
            "city": "Colorado Springs",
            "state": "CO",
            "postal_code": "809095533",
            "country_code": "US",
            "telephone_number": "720-848-0000",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "380 Hospital Dr",
            "address_2": "Ste 410",
            "address_purpose": "LOCATION",
            "city": "Macon",
            "state": "GA",
            "postal_code": "312178001",
            "country_code": "US",
            "telephone_number": "478-746-5644",
            "fax_number": "478-745-4849",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "BOSWELL",
        "first_name": "WILLIAM",
        "middle_name": "I",
        "name_suffix": "IV",
        "credential": "PA/AA",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-08-15",
        "last_updated": "2026-02-03",
        "certification_date": "2026-02-03",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "367H00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiologist Assistant",
            "state": "CO",
            "license": "ANT.0000069",
            "primary": false
        },
        {
            "code": "367H00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiologist Assistant",
            "state": "GA",
            "license": "002435",
            "primary": false
        },
        {
            "code": "367H00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiologist Assistant",
            "state": "WI",
            "license": "615-17",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Olin Tate Boson, LMFT
• Alicia K Bosscher, MPH, RD, CD
• Brooke Nicole Bossert, OTD
• Paul Texas Boston, LCSW
• Ashley Amber Bostwick, MS, ATR-P, LPC-IT
• Elizabeth Bothfeld, APRN
• Jessica Lynn Bothun, DNP, APRN, AGPCNP-BC
• Vanesa LM Botsford, MD
• Emily A Bottiani
• Carin A Bouchard, PHARMD

• Anesthesiologist Assistant in Madison, WI
• Providers in Madison, WI by specialty
• Anesthesiologist Assistant in Wisconsin

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 3, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
• 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.