Jack Chen, DO
Rheumatology Physician · Corvallis, OR
Jack Chen, DO is a rheumatology physician with a practice address in Corvallis, Oregon, and NPI 1821400367, issued on Jun 2, 2014. Check the license (Oregon DO195700, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Jack Chen
- Credential
- DO
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- DO195700 OR
Self-reported in NPPES; status is on the state search - Practice location
- 3620 NW Samaritan Dr Ste 202, Corvallis, OR 97330
- Phone
- (541) 768-5800
- Enumerated
- Jun 2, 2014
- Record last updated
- Nov 6, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20230220001103); accepts Medicare assignment
- Medical or professional school
- Philadelphia College Of Osteopathic Medicine, 2014
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 101 in Oregon → Look up another NPI →
Also registered at 3620 NW Samaritan Dr Ste 202
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mary Abraham, MDRheumatology Physician1073876199
- Jakob Carlson, PAPhysician Assistant1871300665
- Melissa Coombs, PASurgical Physician Assistant1457449316
- Lacey GrugelPhysician Assistant1659132454
- Carson Jones, PHARMDPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1952037186
- Jonathan Jones, MDRheumatology Physician1003868720
Verify Jack Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license DO195700Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
62% fewer Medicare Part D claims than the average rheumatology physician in 2024
761 Medicare Part D claims for 173 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D.
Most prescribed
- Prednisone204 claims
- Methotrexate117 claims
- Hydroxychloroquine Sulfate97 claims
- Enbrel Sureclick64 claims
- Humira(Cf) Pen39 claims
- Rinvoq33 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: $383.38
6 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. The 4,486 providers of this specialty with any payment received $8,538.33 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
- Multicare Health SystemTacoma, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jack Chen among 101 rheumatology physician records in Oregon
Jack Chen, DO is one of 101 rheumatology 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 2014, is newer than 81% of them.
- NPI issued2014 · 81% of these records are older, 12% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2014 · median 2004 among the 65 with a school on file
- Record last updated2020 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in Oregon
There are 101 rheumatology physician records in Oregon.
All 101 in Oregon → Every provider in Corvallis → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Mary Abraham, MDCorvallis, OR 973301073876199
- Jonathan Jones, MDCorvallis, OR 973301003868720
- John Ladd, M.D.Corvallis, OR 973301164471967
- Michelle Ryan, MDCorvallis, OR 973301912019217
- John Thompson, MDCorvallis, OR 973301972581502
- Amitha Gona, M.DSalem, OR 973011053611566
- Daniel Mendez-Allwood, MDSalem, OR 973011821239310
- Stephen Stewart, M.D.Salem, OR 973011588717680
Common questions
What is Jack Chen, DO's NPI number?
Jack Chen, DO's National Provider Identifier (NPI) is 1821400367, issued on Jun 2, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Jack Chen, DO located?
The NPPES record lists a practice address at 3620 NW Samaritan Dr Ste 202, Corvallis, OR, 97330. Phone: (541) 768-5800. Providers update this record themselves, so call before visiting.
How can I verify Jack Chen, DO's license?
NPPES lists Oregon license number DO195700, 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 Jack Chen, DO prescribe under Medicare Part D?
In 2024, Jack Chen, DO had 761 Medicare Part D claims for 173 beneficiaries; the average among rheumatology physician prescribers was 1,978. 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.