Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mr. David Morris Segouia Grunkemeier, MD

Individual provider Gastroenterology Physician · NPI 1972542090

Mr. David Morris Segouia Grunkemeier, MD practises Gastroenterology in Portland, Oregon. Graduated from Un of California, Irvine, College of Medicine in 2000, 26 years ago. Practices with The Oregon Clinic, PC, a 352-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Oregon.

Years since qualifying
26
Trained at
Un of California, Irvine, College of Medicine
Licensed in
OR
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

9701 SW Barnes Rd Ste #300
Portland, OR 97225-6589
Phone: (503) 297-8081
Fax: (503) 292-6601
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence MD23842 (OR)

Record details

NPI number1972542090
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 5, 2006
Last updated in NPPESNovember 18, 2024
Certification dateNovember 18, 2024

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Also practisesINTERNAL MEDICINE
Medical schoolUN OF CALIFORNIA, IRVINE, COLLEGE OF MEDICINE
Graduated 2000 (26 years in practice)
Group practice The Oregon Clinic, Pc — 352 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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 63 times · 69th percentile
Upper gastrointestinal (GI) endoscopy for acid reflux 41 times · 60th 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 patients227
Services billed 4,742 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. Those with a page here are linked.

Colleagues at The Oregon Clinic, PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 352 clinicians in the practice; 12 are shown here.

Other providers in Portland