Chao-Wei Tsai, MD
Internal Medicine Physician · Olympia, WA
Chao-Wei Tsai, MD is an internal medicine physician with a practice address in Olympia, Washington, and NPI 1447607171, issued on May 23, 2016. Check the license (Washington MD61158561, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Chao-Wei Tsai
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- MD61158561 WA
298699 NY
Self-reported in NPPES; status is on the state search - Practice location
- 413 Lilly RD NE, Olympia, WA 98506
- Phone
- (360) 493-4083
- Enumerated
- May 23, 2016
- Record last updated
- May 4, 2022
- Medicare enrollment
- Enrolled (PECOS I20210730002485); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,079 in Washington → Look up another NPI →
Also registered at 413 Lilly RD NE
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Andrea Andrews, PHARMDPharmacist1952855389
- Scott Archer, ARNPAdult Health Nurse Practitioner1093979940
Verify Chao-Wei Tsai in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD61158561Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average internal medicine physician in 2024
49 Medicare Part D claims for 17 beneficiaries, against an average of 3,176 among the 108,855 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.
Bills Medicare through one group practice
- Providence Health And Services WashingtonOlympia, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Chao-Wei Tsai among 3,079 internal medicine physician records in Washington
Chao-Wei Tsai, MD is one of 3,079 internal medicine physician records with a practice address in Washington. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 79% of them.
- NPI issued2016 · 79% of these records are older, 18% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2016 · median 2006 among the 1,852 with a school on file
- Record last updated2022 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
78 internal medicine physician records list a practice address in Olympia
They are 78 of the 5,034 NPPES records with a practice address in Olympia, and 3,079 internal medicine physician records in Washington.
All 3,079 in Washington → Every provider in Olympia → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Waleed Abraham, MDOlympia, WA 985061871567495
- Kawandus Bennett, MDOlympia, WA 985061912945718
- Poonam BhagiaOlympia, WA 985061275592628
- Zachary Chen, MDOlympia, WA 985061679689780
- Julio Gonzalez, M.D.Olympia, WA 985061447204326
- Andrei Ionescu, M.D.Olympia, WA 985061689604589
- Shalini Jacob, M.D., MRCP, FACPOlympia, WA 985061144206038
- Susan Links, M.D.Olympia, WA 985061639272701
Common questions
What is Chao-Wei Tsai, MD's NPI number?
Chao-Wei Tsai, MD's National Provider Identifier (NPI) is 1447607171, issued on May 23, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Chao-Wei Tsai, MD located?
The NPPES record lists a practice address at 413 Lilly RD NE, Olympia, WA, 98506. Phone: (360) 493-4083. Providers update this record themselves, so call before visiting.
How can I verify Chao-Wei Tsai, MD's license?
NPPES lists Washington license number MD61158561, 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 Chao-Wei Tsai, MD prescribe under Medicare Part D?
In 2024, Chao-Wei Tsai, MD had 49 Medicare Part D claims for 17 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.