David Anthony Knuff, M.D.
Gastroenterology Physician · Green Bay, WI
David Anthony Knuff, M.D. is a gastroenterology physician with a practice address in Green Bay, Wisconsin, and NPI 1386723773, issued on Nov 4, 2006. Check the license (Wisconsin 47715-020, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- David Anthony Knuff
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 47715-020 WI
Self-reported in NPPES; status is on the state search - Practice location
- 725 S Webster Ave, Green Bay, WI 54301
- Phone
- (920) 431-5650
- Enumerated
- Nov 4, 2006
- Record last updated
- May 5, 2022
- Fax
- (920) 433-7400
- Medicaid ID
- 34954400 WI
- Medicare enrollment
- Enrolled (PECOS I20080123000695); accepts Medicare assignment
- Medical or professional school
- Wayne State University School Of Medicine, 2000
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 340 in Wisconsin → Look up another NPI →
Also registered at 725 S Webster Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Narayan Amarnani, MDGastroenterology Physician1245307321
- Megan Brzezinski, APNPNurse Practitioner1083059034
- Alexandria Caelwaerts, D-PTPhysical Therapist1184149965
- Jeremy Cross, M.S.P.T.Physical Therapist1932246246
- Jacquelyn Delfosse McDonald, DPTPhysical Therapist1457804676
- Melissa Dercks, APNPAdult Health Nurse Practitioner1710202577
Verify David Anthony Knuff in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 47715-020Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
11% fewer Medicare Part D claims than the average gastroenterology physician in 2024
722 Medicare Part D claims for 561 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 37% of claims.
Most prescribed
- Peg 3350-Electrolyte315 claims
- Sod Sulf-Potass Sulf-Mag Sulf99 claims
- Omeprazole82 claims
- Sutab70 claims
- Pantoprazole Sodium36 claims
- Mesalamine19 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
- Bellin Memorial Hospital IncGreen Bay, WI
- Oconto Hospital And Medical Center IncMarinette, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
David Anthony Knuff among 340 gastroenterology physician records in Wisconsin
David Anthony Knuff, M.D. 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 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 44% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2000 · median 2003 among the 239 with a school on file
- Record last updated2022 · 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 Green Bay → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Narayan Amarnani, MDGreen Bay, WI 543011245307321
- Kanwar Arora, MDGreen Bay, WI 543011659377828
- Swati Chaudhari, MDGreen Bay, WI 543011306918446
- Matthew Kaspar, MDGreen Bay, WI 543011275853319
- David Stampfl, MDGreen Bay, WI 543011386711463
- Kwabena Adu-Gyamfi, MDGreen Bay, WI 543031154677391
- Mohamed Azab, M.DGreen Bay, WI 543031013390434
- Roland Christian, MDGreen Bay, WI 543031972529097
Common questions
What is David Anthony Knuff, M.D.'s NPI number?
David Anthony Knuff, M.D.'s National Provider Identifier (NPI) is 1386723773, issued on Nov 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is David Anthony Knuff, M.D. located?
The NPPES record lists a practice address at 725 S Webster Ave, Green Bay, WI, 54301. Phone: (920) 431-5650. Providers update this record themselves, so call before visiting.
How can I verify David Anthony Knuff, M.D.'s license?
NPPES lists Wisconsin license number 47715-020, 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 David Anthony Knuff, M.D. prescribe under Medicare Part D?
In 2024, David Anthony Knuff, M.D. had 722 Medicare Part D claims for 561 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.