Dirk Jacob Van Leeuwen, M.D., PH.D., FAASLD
Gastroenterology Physician · Portland, OR
Dirk Jacob Van Leeuwen, M.D., PH.D., FAASLD is a gastroenterology physician with a practice address in Portland, Oregon, and NPI 1205941309, issued on Aug 20, 2006. Check the license (Oregon CP206793, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Dirk Jacob Van Leeuwen
- Credential
- M.D., PH.D., FAASLD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License numbers
- CP206793 OR
EMERGENT KY
Self-reported in NPPES; status is on the state search - Practice location
- 10000 SE Main St Ste 112, Portland, OR 97216
- Phone
- (503) 255-3054
- Enumerated
- Aug 20, 2006
- Record last updated
- Feb 22, 2023
- Fax
- (503) 255-7651
- Medicaid ID
- 100220249 WI
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 281 in Oregon → Look up another NPI →
Also registered at 10000 SE Main St Ste 112
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Richard Brandes, MDGastroenterology Physician1750420766
- Ginger Degravelle, MDGastroenterology Physician1205362944
- Victor Fishman, MDGastroenterology Physician1093754285
- Milton Johnson, M.D.Gastroenterology Physician1811907306
- Justin Lewis, M.D.Gastroenterology Physician1831621929
- Michael Owens, MDGastroenterology Physician1154327716
Verify Dirk Jacob Van Leeuwen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license CP206793Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average gastroenterology physician in 2024
40 Medicare Part D claims for 14 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D.
Most prescribed
- Pantoprazole Sodium15 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.
Dirk Jacob Van Leeuwen among 281 gastroenterology physician records in Oregon
Dirk Jacob Van Leeuwen, M.D., PH.D., FAASLD 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 fileNo · 72% of these records are
- Record last updated2023 · 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
- Richard Brandes, MDPortland, OR 972161750420766
- Ginger Degravelle, MDPortland, OR 972161205362944
- Victor Fishman, MDPortland, OR 972161093754285
- Milton Johnson, M.D.Portland, OR 972161811907306
- Justin Lewis, M.D.Portland, OR 972161831621929
- Michael Owens, MDPortland, OR 972161154327716
- Laura Pestana, DOPortland, OR 972161588002521
- Myron Lezak, MDPortland, OR 972191487654992
Common questions
What is Dirk Jacob Van Leeuwen, M.D., PH.D., FAASLD's NPI number?
Dirk Jacob Van Leeuwen, M.D., PH.D., FAASLD's National Provider Identifier (NPI) is 1205941309, issued on Aug 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Dirk Jacob Van Leeuwen, M.D., PH.D., FAASLD located?
The NPPES record lists a practice address at 10000 SE Main St Ste 112, Portland, OR, 97216. Phone: (503) 255-3054. Providers update this record themselves, so call before visiting.
How can I verify Dirk Jacob Van Leeuwen, M.D., PH.D., FAASLD's license?
NPPES lists Oregon license number CP206793, 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 Dirk Jacob Van Leeuwen, M.D., PH.D., FAASLD prescribe under Medicare Part D?
In 2024, Dirk Jacob Van Leeuwen, M.D., PH.D., FAASLD had 40 Medicare Part D claims for 14 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.