Thomas Joseph Holobyn
Internal Medicine Physician · Madison, WI
Thomas Joseph Holobyn is an internal medicine physician with a practice address in Madison, Wisconsin, and NPI 1891114542, issued on Apr 9, 2014. Check the license (Wisconsin 65132, as entered in NPPES) on the Wisconsin Medical Examining Board; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Thomas Joseph Holobyn
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 65132 WI
Self-reported in NPPES; status is on the state search - Practice location
- UW Hospital And Clinics, Madison, WI 53792
- Phone
- (608) 263-5660
- Enumerated
- Apr 9, 2014
- Record last updated
- Mar 7, 2017 (not updated in 9 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,078 in Wisconsin → Look up another NPI →
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A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Thomas Joseph Holobyn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 65132Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Thomas Joseph Holobyn among 2,078 internal medicine physician records in Wisconsin
Thomas Joseph Holobyn 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 not. Its NPI, issued in 2014, is newer than 72% of them.
- NPI issued2014 · 72% of these records are older, 27% newer
- In a Medicare fileNo · 70% of these records are
- In the CMS Doctors and Clinicians fileNo · 53% of these records are
- Record last updated2017 · 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. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 2,078 in Wisconsin → Every provider in Madison → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Sabina Agrawal, D.O.Madison, WI 537921659336089
- Madelyn Alvarez, MDMadison, WI 537921063831717
- Will Bringgold, MD,MSMadison, WI 537921881048940
- Kenneth Coggins, M.D.Madison, WI 537921124415021
- Peter Kleinschmidt, M.D.Madison, WI 537921295153583
- Kristina Little, M.D.Madison, WI 537921558724914
- David Meyers, MDMadison, WI 537921245208271
- Amit Nautiyal, MDMadison, WI 537921932266590
Common questions
What is Thomas Joseph Holobyn's NPI number?
Thomas Joseph Holobyn's National Provider Identifier (NPI) is 1891114542, issued on Apr 9, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Joseph Holobyn located?
The NPPES record lists a practice address at UW Hospital And Clinics, Madison, WI, 53792. Phone: (608) 263-5660. Providers update this record themselves, so call before visiting.
How can I verify Thomas Joseph Holobyn's license?
NPPES lists Wisconsin license number 65132, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.