Thomas Westfall, MD
Internal Medicine Physician · Madison, WI
Thomas Westfall, MD is an internal medicine physician with a practice address in Madison, Wisconsin, and NPI 1558388355, issued on Jul 16, 2006. Check the license (Wisconsin 54671-20, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Thomas Westfall
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 54671-20 WI
036-115763 IL
Self-reported in NPPES; status is on the state search - Practice location
- 202 S Park St, Madison, WI 53715
- Phone
- (608) 417-5659
- Enumerated
- Jul 16, 2006
- Record last updated
- Jun 13, 2026
- Fax
- (608) 417-5890
- Medicare enrollment
- Enrolled (PECOS I20101115000783); accepts Medicare assignment
- Medical or professional school
- University Of Wisconsin School Of Medicine, 2003
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,078 in Wisconsin → Look up another NPI →
Also registered at 202 S Park St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Thomas Westfall in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 54671-20Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
100% fewer Medicare Part D claims than the average internal medicine physician in 2024
15 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Meriter Hospital IncMadison, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thomas Westfall among 2,078 internal medicine physician records in Wisconsin
Thomas Westfall, MD is one of 2,078 internal medicine physician records with a practice address in Wisconsin. 70% 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 9% of them.
- NPI issued2006 · 9% of these records are older, 46% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2003 · median 2002 among the 1,098 with a school on file
- Record last updated2026 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
417 internal medicine physician records list a practice address in Madison
They are 417 of the 15,014 NPPES records with a practice address in Madison, and 2,078 internal medicine physician records in Wisconsin.
All 2,078 in Wisconsin → Every provider in Madison → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Thomas Bugliosi, M.D.Madison, WI 537151629055124
- Rebecca Byers, MDMadison, WI 537151568439248
- Tony Chang, MDMadison, WI 537151831166990
- Heather Childers-Okas, DOMadison, WI 537151093782765
- Richard Day, MDMadison, WI 537151972570653
- Elizabeth George, MDMadison, WI 537151255308409
- Jeremy Jaskunas, MDMadison, WI 537151568438414
- Frank Kilpatrick, MDMadison, WI 537151154397172
Common questions
What is Thomas Westfall, MD's NPI number?
Thomas Westfall, MD's National Provider Identifier (NPI) is 1558388355, issued on Jul 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Westfall, MD located?
The NPPES record lists a practice address at 202 S Park St, Madison, WI, 53715. Phone: (608) 417-5659. Providers update this record themselves, so call before visiting.
How can I verify Thomas Westfall, MD's license?
NPPES lists Wisconsin license number 54671-20, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Thomas Westfall, MD prescribe under Medicare Part D?
In 2024, Thomas Westfall, MD had 15 Medicare Part D claims; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
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.