David Morris Segouia Grunkemeier, MD
Gastroenterology Physician · Portland, OR
David Morris Segouia Grunkemeier, MD is a gastroenterology physician with a practice address in Portland, Oregon, and NPI 1972542090, issued on Jun 5, 2006. Check the license (Oregon MD23842, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- David Morris Segouia Grunkemeier
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- MD23842 OR
Self-reported in NPPES; status is on the state search - Practice location
- 9701 SW Barnes RD, Portland, OR 97225
- Phone
- (503) 297-8081
- Enumerated
- Jun 5, 2006
- Record last updated
- Nov 18, 2024
- Fax
- (503) 292-6601
- Medicaid IDs
- 006116 OR
8402478 WA - Medicare enrollment
- Enrolled (PECOS I20070912000820); accepts Medicare assignment
- Medical or professional school
- Un Of California, Irvine, College Of Medicine, 2000
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 281 in Oregon → Look up another NPI →
Also registered at 9701 SW Barnes RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Vesna Ader, PA-CMedical Physician Assistant1467528398
- Suzanne Adlesich, RNHigh-Risk Obstetric Registered Nurse1376479154
- Philip Alexander, MDVascular Surgery Physician1386640688
- Anna Anderson, PMHNPPsychiatric/Mental Health Nurse Practitioner1578601696
- Patrick Birbeck, PACMedical Physician Assistant1851397400
- Amy Caine, PA-CMedical Physician Assistant1558307678
Verify David Morris Segouia Grunkemeier in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD23842Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5% more Medicare Part D claims than the average gastroenterology physician in 2024
854 Medicare Part D claims for 355 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D.
Most prescribed
- Ondansetron Odt175 claims
- Omeprazole133 claims
- Sutab51 claims
- Mesalamine40 claims
- Humira(Cf) Pen37 claims
- Gavilyte-G35 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.
Industry payments in 2024: $30.00
1 payment: food and beverage; the largest payer was CapsoVision, Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- The Oregon Clinic, PCPortland, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
David Morris Segouia Grunkemeier among 281 gastroenterology physician records in Oregon
David Morris Segouia Grunkemeier, MD is one of 281 gastroenterology physician records with a practice address in Oregon. 79% 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 20% of them.
- NPI issued2006 · 20% of these records are older, 45% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2000 · median 2003 among the 201 with a school on file
- Record last updated2024 · 45% 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 Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Oregon
There are 281 gastroenterology physician records in Oregon.
All 281 in Oregon → Every provider in Portland → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Christopher Carter, MDPortland, OR 972251003814799
- Glenn Eisen, MDPortland, OR 972251295741759
- Larry Heinonen, MDPortland, OR 972251669478343
- John Jendrzejewski, MDPortland, OR 972251225034911
- Alan Kaynard, MDPortland, OR 972251356347991
- George Koval, MDPortland, OR 972251093711715
- John Lobitz, MDPortland, OR 972251851397558
- Sarah Rodriguez, MDPortland, OR 972251386665214
Common questions
What is David Morris Segouia Grunkemeier, MD's NPI number?
David Morris Segouia Grunkemeier, MD's National Provider Identifier (NPI) is 1972542090, issued on Jun 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is David Morris Segouia Grunkemeier, MD located?
The NPPES record lists a practice address at 9701 SW Barnes RD, Portland, OR, 97225. Phone: (503) 297-8081. Providers update this record themselves, so call before visiting.
How can I verify David Morris Segouia Grunkemeier, MD's license?
NPPES lists Oregon license number MD23842, as entered by the provider. Search the Oregon Medical Board at https://www.oregon.gov/OMB/Pages/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does David Morris Segouia Grunkemeier, MD prescribe under Medicare Part D?
In 2024, David Morris Segouia Grunkemeier, MD had 854 Medicare Part D claims for 355 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.