James L. Groskreutz, MD
Gastroenterology Physician · La Crosse, WI
James L. Groskreutz, MD is a gastroenterology physician with a practice address in La Crosse, Wisconsin, and NPI 1548265127, issued on Jun 20, 2005. Check the license (Wisconsin 40805, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- James L. Groskreutz
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License numbers
- 40805 WI
MD-44523 IA
29342 MN
Self-reported in NPPES; status is on the state search - Practice location
- 1836 South Ave, La Crosse, WI 54601
- Phone
- (608) 782-7300
- Enumerated
- Jun 20, 2005
- Record last updated
- Sep 2, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicaid ID
- 32544200 WI
- Medicare enrollment
- Enrolled (PECOS I20200904000171); accepts Medicare assignment
- Medical or professional school
- University Of Minnesota Medical School, 1983
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 340 in Wisconsin → Look up another NPI →
Also registered at 1836 South Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Frank Aberger, MDGastroenterology Physician1396748711
- Bradley Abicht, DPMPodiatrist1962632166
- Carter Abicht, DOAnesthesiology Physician1932736642
- Grace AbichtCertified Registered Nurse Anesthetist1003651555
- Paul Abicht, CRNACertified Registered Nurse Anesthetist1528061843
- Mateen Abidi, M.DCardiovascular Disease Physician1730333980
Verify James L. Groskreutz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 40805Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
7% more Medicare Part D claims than the average gastroenterology physician in 2024
870 Medicare Part D claims for 394 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. 11 claims were for opioids.
Most prescribed
- Peg-3350 And Electrolytes148 claims
- Gavilyte-G86 claims
- Omeprazole83 claims
- Ursodiol58 claims
- Mesalamine57 claims
- Gavilyte-C53 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.
Bills Medicare through 2 group practices
- Gundersen Clinic LtdDecorah, IA
- Gundersen Lutheran Medical Center IncWinona, MN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
James L. Groskreutz among 340 gastroenterology physician records in Wisconsin
James L. Groskreutz, MD 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 93% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated1983 · median 2003 among the 239 with a school on file
- Record last updated2020 · 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 La Crosse → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Frank Aberger, MDLa Crosse, WI 546011396748711
- Heather Chial, MDLa Crosse, WI 546011427053768
- Gregory Cramer, MDLa Crosse, WI 546011104807833
- Milan Folkers, MDLa Crosse, WI 546011619064094
- Yonas Getachew, M.D.La Crosse, WI 546011669499000
- Michael Henry, MDLa Crosse, WI 546011366447815
- Kenneth Horth, MDLa Crosse, WI 546011154326684
- Scott Rathgaber, MDLa Crosse, WI 546011336141498
Common questions
What is James L. Groskreutz, MD's NPI number?
James L. Groskreutz, MD's National Provider Identifier (NPI) is 1548265127, issued on Jun 20, 2005. An NPI identifies a provider in billing; it is not a license.
Where is James L. Groskreutz, MD located?
The NPPES record lists a practice address at 1836 South Ave, La Crosse, WI, 54601. Phone: (608) 782-7300. Providers update this record themselves, so call before visiting.
How can I verify James L. Groskreutz, MD's license?
NPPES lists Wisconsin license number 40805, 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 James L. Groskreutz, MD prescribe under Medicare Part D?
In 2024, James L. Groskreutz, MD had 870 Medicare Part D claims for 394 beneficiaries; 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.