Joseph Tsai, MD, PHD
Radiation Oncology Physician · Tacoma, WA
Joseph Tsai, MD, PHD is a radiation oncology physician with a practice address in Tacoma, Washington, and NPI 1043875297, issued on May 2, 2019. Check the license (Washington MD61522808, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Joseph Tsai
- Credential
- MD, PHD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- MD61522808 WA
Self-reported in NPPES; status is on the state search - Practice location
- 1003 S 5TH St, Tacoma, WA 98405
- Phone
- (253) 403-4994
- Enumerated
- May 2, 2019
- Record last updated
- Nov 4, 2024
- Fax
- (253) 403-4991
- Medicare enrollment
- Enrolled (PECOS I20240731004476); accepts Medicare assignment
- Medical or professional school
- Columbia University College Of Physicians And Surgeons, 2019
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 198 in Washington → Look up another NPI →
Also registered at 1003 S 5TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Abhinav Agarwal, MDInternal Medicine Physician1659538072
- Justine Bucknam, ARNPFamily Nurse Practitioner1821141524
- Min-Chun Chen, M.D.Hematology & Oncology Physician1811913528
- Umesh Chitaley, MDMedical Oncology Physician1720079965
- Jaimee Falk, ARNPNurse Practitioner1104295211
- Melissa Foster, MSW, LICSWClinical Social Worker1457090524
Verify Joseph Tsai in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD61522808Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
75% fewer Medicare Part D claims than the average radiation oncology physician in 2024
33 Medicare Part D claims for 23 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D.
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: $28.51
1 payment: food and beverage; the largest payer was Novocure Inc. The 3,275 providers of this specialty with any payment received $1,897.85 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 SystemKent, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joseph Tsai among 198 radiation oncology physician records in Washington
Joseph Tsai, MD, PHD is one of 198 radiation oncology physician records with a practice address in Washington. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 90% of them.
- NPI issued2019 · 90% of these records are older, 6% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2019 · median 2006 among the 141 with a school on file
- Record last updated2024 · 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 2085R0001X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in Washington
There are 198 radiation oncology physician records in Washington.
All 198 in Washington → Every provider in Tacoma → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Wendy Gao, MDTacoma, WA 984051477852218
- Susan Guo, MDTacoma, WA 984051932375805
- Ann Pittier, MDTacoma, WA 984051306950894
- Michael Soronen, MDTacoma, WA 984051861463242
- Herbert Wang, MDTacoma, WA 984051699746081
- Thomas Mullen, MD, PHDSilverdale, WA 983831053673202
- Robyn Vera, DOSilverdale, WA 983831033370705
- Susan Feeney, MDSequim, WA 983821750321469
Common questions
What is Joseph Tsai, MD, PHD's NPI number?
Joseph Tsai, MD, PHD's National Provider Identifier (NPI) is 1043875297, issued on May 2, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Joseph Tsai, MD, PHD located?
The NPPES record lists a practice address at 1003 S 5TH St, Tacoma, WA, 98405. Phone: (253) 403-4994. Providers update this record themselves, so call before visiting.
How can I verify Joseph Tsai, MD, PHD's license?
NPPES lists Washington license number MD61522808, as entered by the provider. Search the Washington Medical Commission at https://wahelms.my.site.com/s/license-search. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Joseph Tsai, MD, PHD prescribe under Medicare Part D?
In 2024, Joseph Tsai, MD, PHD had 33 Medicare Part D claims for 23 beneficiaries; the average among radiation oncology physician prescribers was 134. 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.