Lucas Fass
Gastroenterology Physician · Madison, WI
Lucas Fass is a gastroenterology physician with a practice address in Madison, Wisconsin, and NPI 1427613793, issued on May 2, 2019. Check the license (Wisconsin 81575-20, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Lucas Fass
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 81575-20 WI
Self-reported in NPPES; status is on the state search - Practice location
- 600 Highland Ave, Madison, WI 53792
- Phone
- (608) 628-3664
- Enumerated
- May 2, 2019
- Record last updated
- Jun 9, 2025
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 340 in Wisconsin → Look up another NPI →
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Verify Lucas Fass in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 81575-20Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average gastroenterology physician in 2024
11 Medicare Part D claims, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
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.
Lucas Fass among 340 gastroenterology physician records in Wisconsin
Lucas Fass is one of 340 gastroenterology physician records with a practice address in Wisconsin. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 94% of them.
- NPI issued2019 · 94% of these records are older, 5% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileNo · 70% of these records are
- Record last updated2025 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Wisconsin
There are 340 gastroenterology physician records in Wisconsin.
All 340 in Wisconsin → Every provider in Madison → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Jihad Aljabban, MD, MMSCMadison, WI 537921699304808
- Kerstin Austin, M.D.Madison, WI 537921497013023
- Mark Benson, M.D.Madison, WI 537921114950987
- Omar Calderon, MDMadison, WI 537921295364081
- Matthew Ewy, MD, RD, CNSCMadison, WI 537921487045696
- Annette Glasser, CNPMadison, WI 537921851352363
- Luis Lomeli, MDMadison, WI 537921851686281
- Alexandru Musat, MDMadison, WI 537921487621074
Common questions
What is Lucas Fass's NPI number?
Lucas Fass's National Provider Identifier (NPI) is 1427613793, issued on May 2, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Lucas Fass located?
The NPPES record lists a practice address at 600 Highland Ave, Madison, WI, 53792. Phone: (608) 628-3664. Providers update this record themselves, so call before visiting.
How can I verify Lucas Fass's license?
NPPES lists Wisconsin license number 81575-20, 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 Lucas Fass prescribe under Medicare Part D?
In 2024, Lucas Fass had 11 Medicare Part D claims; the average among gastroenterology physician prescribers was 811. 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.