Stephen Lumin Chen, M.D.
Gastroenterology Physician · Tualatin, OR
Stephen Lumin Chen, M.D. is a gastroenterology physician with a practice address in Tualatin, Oregon, and NPI 1831221837, issued on Mar 12, 2007. Check the license (Oregon MD27258, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Stephen Lumin Chen
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- MD27258 OR
Self-reported in NPPES; status is on the state search - Practice location
- 19250 SW 90TH Ave, Tualatin, OR 97062
- Phone
- (503) 692-3750
- Enumerated
- Mar 12, 2007
- Record last updated
- Nov 28, 2023
- Fax
- (503) 691-2324
- Medicaid IDs
- 243119 OR
1831221837 WA - Medicare enrollment
- Enrolled (PECOS I20070917000534); accepts Medicare assignment
- Medical or professional school
- University Of Chicago, Pritzker School Of Medicine, 2001
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 281 in Oregon → Look up another NPI →
Also registered at 19250 SW 90TH Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michelle Beilstein, MDGastroenterology Physician1518954668
- Anantnoor Brar, MDGastroenterology Physician1376004101
- Mark Cahill, MDGastroenterology Physician1598957888
- Ryan Childers, M.D.Gastroenterology Physician1568627594
- Jeffrey Douglass, MDGastroenterology Physician1487611984
- Jeffrey Duman, MDGastroenterology Physician1174679773
Verify Stephen Lumin Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD27258Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
25% fewer Medicare Part D claims than the average gastroenterology physician in 2024
612 Medicare Part D claims for 222 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Omeprazole147 claims
- Pantoprazole Sodium40 claims
- Famotidine34 claims
- Sod Sulf-Potass Sulf-Mag Sulf24 claims
- Ondansetron Hcl21 claims
- Xifaxan20 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: $31.95
1 payment: food and beverage; the largest payer was Janssen Biotech, 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, PCOregon City, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stephen Lumin Chen among 281 gastroenterology physician records in Oregon
Stephen Lumin Chen, M.D. 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 2007, is newer than 55% of them.
- NPI issued2007 · 55% of these records are older, 31% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2001 · median 2003 among the 201 with a school on file
- 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).
18 gastroenterology physician records list a practice address in Tualatin
They are 18 of the 863 NPPES records with a practice address in Tualatin, and 281 gastroenterology physician records in Oregon.
All 281 in Oregon → Every provider in Tualatin → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Michelle Beilstein, MDTualatin, OR 970621518954668
- Mark Cahill, MDTualatin, OR 970621598957888
- Ryan Childers, M.D.Tualatin, OR 970621568627594
- Jeffrey Douglass, MDTualatin, OR 970621487611984
- Jeffrey Duman, MDTualatin, OR 970621174679773
- Karl Kim, MDTualatin, OR 970621902958671
- Sarah LeeTualatin, OR 970621972861599
- Ronald Lew, MDTualatin, OR 970621265428619
Common questions
What is Stephen Lumin Chen, M.D.'s NPI number?
Stephen Lumin Chen, M.D.'s National Provider Identifier (NPI) is 1831221837, issued on Mar 12, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Stephen Lumin Chen, M.D. located?
The NPPES record lists a practice address at 19250 SW 90TH Ave, Tualatin, OR, 97062. Phone: (503) 692-3750. Providers update this record themselves, so call before visiting.
How can I verify Stephen Lumin Chen, M.D.'s license?
NPPES lists Oregon license number MD27258, 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 Stephen Lumin Chen, M.D. prescribe under Medicare Part D?
In 2024, Stephen Lumin Chen, M.D. had 612 Medicare Part D claims for 222 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.