Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

David Anthony Knuff, MD

Individual provider Gastroenterology Physician · NPI 1386723773

David Anthony Knuff, MD practises Gastroenterology in Green Bay, Wisconsin. Graduated from Wayne State University School of Medicine in 2000, 26 years ago. Practices with Oconto Hospital and Medical Center Inc, a 217-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Wisconsin.

Years since qualifying
26
Trained at
Wayne State University School of Medicine
Licensed in
WI
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

725 S Webster Ave
Green Bay, WI 54301-3500
Phone: (920) 431-5650
Fax: (920) 433-7400
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 2820 Roosevelt Rd, Marinette, WI 54143-3834 — (715) 735-5225
  • 820 Arbutus Ave, Oconto, WI 54153-2004 — (920) 835-1100

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 47715-020 (WI)

Record details

NPI number1386723773
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 4, 2006
Last updated in NPPESMay 5, 2022
Certification dateMay 5, 2022

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGASTROENTEROLOGY
Medical schoolWAYNE STATE UNIVERSITY SCHOOL OF MEDICINE
Graduated 2000 (26 years in practice)
Group practice Oconto Hospital And Medical Center Inc — 217 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Colonoscopy 137 times · 87th percentile
Upper gastrointestinal (GI) endoscopy for acid reflux 167 times · 87th percentile

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients238
Services billed 322 a service is one billed item, such as a visit, a test or a procedure
Average patient age70

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Oconto Hospital and Medical Center Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 217 clinicians in the practice; 12 are shown here.

Other providers in Green Bay