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

Dr. Ronald J. Hapke, MD

Individual provider Gastroenterology Physician · NPI 1841290699

Dr. Ronald J. Hapke, MD practises Gastroenterology in Clackamas, Oregon. Graduated from University of Chicago, Pritzker School of Medicine in 1992, 34 years ago. Practices with Kaiser Foundation Health Plan of the Northwest, a 1,811-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Oregon.

Years since qualifying
34
Trained at
University of Chicago, Pritzker School of Medicine
Licensed in
OR
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

9900 SE Sunnyside Rd
Clackamas, OR 97015-9777
Phone: (503) 571-8240
Fax: (503) 571-8984
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 14406 Ne 20th Ave, Vancouver, WA 98686-1448 — (360) 571-3005

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence MD19291 (OR)

Record details

NPI number1841290699
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 22, 2005
Last updated in NPPESMarch 14, 2025
Certification dateMarch 14, 2025

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Medical schoolUNIVERSITY OF CHICAGO, PRITZKER SCHOOL OF MEDICINE
Graduated 1992 (34 years in practice)
Group practice Kaiser Foundation Health Plan Of The Northwest — 1811 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 1–10 times
Upper gastrointestinal (GI) endoscopy for acid reflux 1–10 times

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 patients195
Services billed 552 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

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 Kaiser Foundation Health Plan of the Northwest

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1811 clinicians in the practice; 12 are shown here.

Other providers in Clackamas