William I. Boswell, PA/AA
Anesthesiologist Assistant · Madison, WI
William I. Boswell, PA/AA is an anesthesiologist assistant with a practice address in Madison, Wisconsin, and NPI 1457464679, issued on Aug 15, 2006. Check the license (Wisconsin 615-17, as entered in NPPES) with the Wisconsin board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William I. Boswell
- Credential
- PA/AA
- Primary taxonomy
- Anesthesiologist Assistant 367H00000X
- License numbers
- 615-17 WI
ANT.0000069 CO
002435 GA
Self-reported in NPPES; status is on the state search - Practice location
- 600 Highland Ave, Madison, WI 53792
- Phone
- (608) 263-8100
- Enumerated
- Aug 15, 2006
- Record last updated
- Feb 3, 2026
- Medicare enrollment
- Enrolled (PECOS I20170110000319); accepts Medicare assignment
- Medical or professional school
- Emory University School Of Medicine, 1993
- Entity
- Type 1 · individual
8 nearest anesthesiologist assistant records → All 264 in Wisconsin → Look up another NPI →
Also registered at 600 Highland Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michael AabergSurgery Physician1346991064
- Carrah Aadrik, CRNACertified Registered Nurse Anesthetist1326423286
- Daniel Abbott, MDSurgical Oncology Physician1750412615
- Alaa Abd-ElsayedPain Medicine Physician1194967703
- Safiyya Abdulkadir, MDRheumatology Physician1093455826
- Edwin Abel, M.D.Urology Physician1083800510
Verify William I. Boswell in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
Search for license 615-17Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The MIPS final score for 2023 (Medicare payment program): 97.6 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $25.34
1 payment: food and beverage; the largest payer was Medtronic, Inc. The 1,380 providers of this specialty with any payment received $114.24 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 5 group practices
- Ozark Anesthesia Associates IncSpringfield, MO
- Physician Anesthesia Services PCWheat Ridge, CO
- Poudre Valley Medical Group LLCColorado Springs, CO
- University OF Wisconsin Medical Foundation IncMadison, WI
- US Anesthesia Partners OF Colorado IncEnglewood, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William I. Boswell among 264 anesthesiologist assistant records in Wisconsin
William I. Boswell, PA/AA is one of 264 anesthesiologist assistant records with a practice address in Wisconsin. 95% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 93% newer
- In a Medicare fileYes · 95% of these records are
- In the CMS Doctors and Clinicians fileYes · 93% of these records are
- Graduated1993 · median 2020 among the 246 with a school on file
- Record last updated2026 · 32% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 367H00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Anesthesiologist Assistant providers in Wisconsin
There are 264 anesthesiologist assistant records in Wisconsin.
All 264 in Wisconsin → Every provider in Madison → Anesthesiologist Assistant nationwide →
The 8 anesthesiologist assistant records with the nearest ZIP codes
- Jessica Ashba, AA-CMadison, WI 537921558641407
- Keisha Ashley, AA-CMadison, WI 537921194981613
- Gregory Aycock, CAAMadison, WI 537921215924527
- Eliza Bergstrom, CAAMadison, WI 537921801156385
- Leonard Boras, AACMadison, WI 537921295701761
- Nikki Brechtel, AA-CMadison, WI 537921073848842
- Randall Degreef, AAMadison, WI 537921396705778
- Michael Devine, AACMadison, WI 537921164498671
Common questions
What is William I. Boswell, PA/AA's NPI number?
William I. Boswell, PA/AA's National Provider Identifier (NPI) is 1457464679, issued on Aug 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William I. Boswell, PA/AA located?
The NPPES record lists a practice address at 600 Highland Ave, Madison, WI, 53792. Phone: (608) 263-8100. Providers update this record themselves, so call before visiting.
How can I verify William I. Boswell, PA/AA's license?
NPPES lists Wisconsin license number 615-17, as entered by the provider. Search the Wisconsin board that licenses this profession; the NPPES record confirms identity only.
What is William I. Boswell, PA/AA's MIPS final score?
The 2023 MIPS final score is 97.6 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.