Katherine D. Dempster, MD
Internal Medicine Physician · Portland, OR
Katherine D. Dempster, MD is an internal medicine physician with a practice address in Portland, Oregon, and NPI 1477755262, issued on Jun 4, 2007. Check the license (Oregon MD28134, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Katherine D. Dempster
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- MD28134 OR
79562 AZ
MD.200886 LA
Self-reported in NPPES; status is on the state search - Practice location
- 2801 N Gantenbein Ave, Portland, OR 97227
- Phone
- (503) 413-8407
- Enumerated
- Jun 4, 2007
- Record last updated
- Feb 26, 2026
- Medicare enrollment
- Enrolled (PECOS I20080923000653); accepts Medicare assignment
- Medical or professional school
- University Of Arkansas College Of Medicine, 2004
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,116 in Oregon → Look up another NPI →
Also registered at 2801 N Gantenbein Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Corey Anderson, PSY.D.Clinical Neuropsychologist1114278819
- Amy Anderton, MDInternal Medicine Physician1568802361
- Roberto Anker, M.D.Anatomic Pathology & Clinical Pathology Physician1518179613
- Dilara ArtikaslanClinical Social Worker1083494140
- Cibi Arumugam, M.D.Internal Medicine Physician1376822742
- Bradley Baker, MDInternal Medicine Physician1831357615
Verify Katherine D. Dempster in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD28134Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
29% more Medicare Part D claims than the average internal medicine physician in 2024
4,112 Medicare Part D claims for 300 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 351 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen146 claims
- Oxycodone Hcl130 claims
- Atorvastatin Calcium122 claims
- Losartan Potassium122 claims
- Gabapentin119 claims
- Rosuvastatin Calcium115 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: $22.46
1 payment: food and beverage; the largest payer was Abbott Laboratories. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Legacy Emanuel Hospital And Health CenterPortland, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katherine D. Dempster among 2,116 internal medicine physician records in Oregon
Katherine D. Dempster, MD is one of 2,116 internal medicine physician records with a practice address in Oregon. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 46% of them.
- NPI issued2007 · 46% of these records are older, 45% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2004 · median 2008 among the 1,232 with a school on file
- Record last updated2026 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
889 internal medicine physician records list a practice address in Portland
They are 889 of the 42,088 NPPES records with a practice address in Portland, and 2,116 internal medicine physician records in Oregon.
All 2,116 in Oregon → Every provider in Portland → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Douglas Beers, MDPortland, OR 972271720055197
- Denise Bilbao, M.D.Portland, OR 972271538173943
- Duane Burroughs, MDPortland, OR 972271134197213
- Smitha Chadaga, MDPortland, OR 972271952362295
- Darcy Deering, M.D.Portland, OR 972271205801065
- Lori Farrell, M.D.Portland, OR 972271235103987
- Elise Fulsang, MDPortland, OR 972271952305385
- Ameet Jhooty, M.DPortland, OR 972271295795938
Common questions
What is Katherine D. Dempster, MD's NPI number?
Katherine D. Dempster, MD's National Provider Identifier (NPI) is 1477755262, issued on Jun 4, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Katherine D. Dempster, MD located?
The NPPES record lists a practice address at 2801 N Gantenbein Ave, Portland, OR, 97227. Phone: (503) 413-8407. Providers update this record themselves, so call before visiting.
How can I verify Katherine D. Dempster, MD's license?
NPPES lists Oregon license number MD28134, 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 Katherine D. Dempster, MD prescribe under Medicare Part D?
In 2024, Katherine D. Dempster, MD had 4,112 Medicare Part D claims for 300 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.