James C. Tsai, MD
Internal Medicine Physician · Everett, WA
James C. Tsai, MD is an internal medicine physician with a practice address in Everett, Washington, and NPI 1225149172, issued on Aug 31, 2006. Check the license (Washington MD00046675, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- James C. Tsai
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD00046675 WA
Self-reported in NPPES; status is on the state search - Practice location
- 1321 Colby Ave, Everett, WA 98201
- Phone
- (425) 261-2000
- Enumerated
- Aug 31, 2006
- Record last updated
- Mar 30, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20071015000469); accepts Medicare assignment
- Medical or professional school
- Baylor College Of Medicine, 2004
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,079 in Washington → Look up another NPI →
Also registered at 1321 Colby Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jimmy Ahn, PHARMDAmbulatory Care Pharmacist1386020642
- Lindsy Alanis, MDInternal Medicine Physician1003826603
- Hermella AlemnehStudent in an Organized Health Care Education/Training Program1316635881
- Charles Altenberger, CRNACertified Registered Nurse Anesthetist1982633020
- Naa Afadua AnnohAdult Health Nurse Practitioner1588140073
- Veena Arani, MDInternal Medicine Physician1508152927
Verify James C. Tsai in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00046675Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average internal medicine physician in 2024
403 Medicare Part D claims for 92 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Quetiapine Fumarate19 claims
- Atorvastatin Calcium17 claims
- Levothyroxine Sodium13 claims
- Olanzapine13 claims
- Hydroxyzine Pamoate12 claims
- Metoprolol Succinate12 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.
Bills Medicare through one group practice
- Providence Health And Services- WashingtonEverett, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
James C. Tsai among 3,079 internal medicine physician records in Washington
James C. 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 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 55% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2004 · median 2006 among the 1,852 with a school on file
- Record last updated2021 · 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).
174 internal medicine physician records list a practice address in Everett
They are 174 of the 7,246 NPPES records with a practice address in Everett, and 3,079 internal medicine physician records in Washington.
All 3,079 in Washington → Every provider in Everett → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Irene Altmann, MDEverett, WA 982011073588232
- Jennifer Battaglia, M.D.Everett, WA 982011235117367
- John Dilworth, MDEverett, WA 982011720042856
- Sheryl Dreyer, MDEverett, WA 982011144298043
- Shelly FinnEverett, WA 982011184688210
- Todd Gunderson, MDEverett, WA 982011669436176
- Michael Jenks, MDEverett, WA 982011477521185
- Tul Kalayanamit, MDEverett, WA 982011932171527
Common questions
What is James C. Tsai, MD's NPI number?
James C. Tsai, MD's National Provider Identifier (NPI) is 1225149172, issued on Aug 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James C. Tsai, MD located?
The NPPES record lists a practice address at 1321 Colby Ave, Everett, WA, 98201. Phone: (425) 261-2000. Providers update this record themselves, so call before visiting.
How can I verify James C. Tsai, MD's license?
NPPES lists Washington license number MD00046675, 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 James C. Tsai, MD prescribe under Medicare Part D?
In 2024, James C. Tsai, MD had 403 Medicare Part D claims for 92 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.