Andrew Tzong-Yow Chen, D.O.
Hematology & Oncology Physician · Bend, OR
Andrew Tzong-Yow Chen, D.O. is a hematology & oncology physician with a practice address in Bend, Oregon, and NPI 1124081096, issued on Apr 10, 2006. Check the license (Oregon DO25841, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Andrew Tzong-Yow Chen
- Credential
- D.O.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- DO25841 OR
Self-reported in NPPES; status is on the state search - Practice location
- 2500 NE Neff RD, Bend, OR 97701
- Phone
- (541) 706-5800
- Enumerated
- Apr 10, 2006
- Record last updated
- Jan 3, 2023
- Fax
- (541) 706-5911
- Medicare enrollment
- Enrolled (PECOS I20050906001073); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 138 in Oregon → Look up another NPI →
Also registered at 2500 NE Neff RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Robert Abernathy, M.D.Internal Medicine Physician1063433449
- Jeffrey Absalon, MDSpecialist1225003833
- Hugh Adair, D.O.Cardiovascular Disease Physician1700866746
- Kylee AdamekPhysician Assistant1326720186
- Laura Adams, L.AC.Internal Medicine Physician1952553745
- Tony Adams, M.D.Critical Care Medicine (Internal Medicine) Physician1497098602
Verify Andrew Tzong-Yow Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license DO25841Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
44% more Medicare Part D claims than the average hematology & oncology physician in 2024
1,263 Medicare Part D claims for 172 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 33% of claims. 43 claims were for opioids.
Most prescribed
- Prednisone97 claims
- Abiraterone Acetate79 claims
- Acyclovir79 claims
- Hydroxyurea73 claims
- Pomalyst62 claims
- Calquence56 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: $435.83
4 payments; by number, the most common kind was food and beverage; the largest payer was Astellas Pharma US Inc. The 8,560 providers of this specialty with any payment received $7,481.41 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
- St Charles Health System IncRedmond, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Andrew Tzong-Yow Chen among 138 hematology & oncology physician records in Oregon
Andrew Tzong-Yow Chen, D.O. is one of 138 hematology & oncology physician records with a practice address in Oregon. 78% 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 18% of them.
- NPI issued2006 · 18% of these records are older, 46% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2002 · median 2001 among the 97 with a school on file
- Record last updated2023 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in Oregon
There are 138 hematology & oncology physician records in Oregon.
All 138 in Oregon → Every provider in Bend → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Todd Clover, MDBend, OR 977011164532107
- Bryden Considine, DOBend, OR 977011356760839
- Brian Erickson, MDBend, OR 977011730168972
- Christina Fitzmaurice, M.D.Bend, OR 977011790915528
- Russell Lewis, M.D.Bend, OR 977011104273382
- Richard Reed, MDBend, OR 977011174508857
- Pradip Rustagi, MDBend, OR 977011881709699
- Alexander Schlitt, DOBend, OR 977011285137224
Common questions
What is Andrew Tzong-Yow Chen, D.O.'s NPI number?
Andrew Tzong-Yow Chen, D.O.'s National Provider Identifier (NPI) is 1124081096, issued on Apr 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Andrew Tzong-Yow Chen, D.O. located?
The NPPES record lists a practice address at 2500 NE Neff RD, Bend, OR, 97701. Phone: (541) 706-5800. Providers update this record themselves, so call before visiting.
How can I verify Andrew Tzong-Yow Chen, D.O.'s license?
NPPES lists Oregon license number DO25841, 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 Andrew Tzong-Yow Chen, D.O. prescribe under Medicare Part D?
In 2024, Andrew Tzong-Yow Chen, D.O. had 1,263 Medicare Part D claims for 172 beneficiaries; the average among hematology & oncology physician prescribers was 877. 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.