NPPES file of Aug 9, 2026

Yen-Tsun Lai, M.D.

Geriatric Medicine (Internal Medicine) Physician · Renton, WA

Yen-Tsun Lai, M.D. is a geriatric medicine (internal medicine) physician with a practice address in Renton, Washington, and NPI 1790727535, issued on Jun 12, 2006. Check the license (Washington MD00042518, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1790727535
Name
Yen-Tsun Lai
Credential
M.D.
Primary taxonomy
Geriatric Medicine (Internal Medicine) Physician 207RG0300X
License number
MD00042518 WA
Self-reported in NPPES; status is on the state search
Practice location
4033 Talbot RD S Ste 570, Renton, WA 98055
Phone
(425) 690-3489
Enumerated
Jun 12, 2006
Record last updated
Nov 26, 2018 (not updated in 8 years: call before relying on the address or phone)
Fax
(425) 690-9089
Medicaid IDs
8365520 WA
1030627 WA
Medicare enrollment
Enrolled (PECOS I20080423000745); accepts Medicare assignment
Medical or professional school
Vanderbilt University School Of Medicine, 2000
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest geriatric medicine (internal medicine) physician records → All 97 in Washington → Look up another NPI →

Also registered at 4033 Talbot RD S Ste 570

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Fernando Casado Castillo, M.D.Infectious Disease Physician1528411774
  2. Amanda Casto, M.D., PH.D.Infectious Disease Physician1497012090
  3. Michele DespreauxInternal Medicine Physician1346326147
  4. Sarah Hillebrand, APRNFamily Nurse Practitioner1740646389
  5. Michael Hori, MDInfectious Disease Physician1205918208
  6. Lindsay Nofziger, NPNurse Practitioner1306365598

Verify Yen-Tsun Lai in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWashington Medical Commission
    Search for license MD00042518    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Washington license search

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61% more Medicare Part D claims than the average geriatric medicine (internal medicine) physician in 2024

6,833 Medicare Part D claims for 878 beneficiaries, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 129 claims were for opioids.

  1. Yen-Tsun Lai6,833
  2. Specialty average4,246

Most prescribed

  1. Amlodipine Besylate420 claims
  2. Atorvastatin Calcium413 claims
  3. Levothyroxine Sodium326 claims
  4. Losartan Potassium265 claims
  5. Rosuvastatin Calcium202 claims
  6. Metoprolol Succinate188 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 4 group practices

  1. King County Public Hospital District NO 2Kirkland, WA
  2. Overlake Medical Clinics LLCBellevue, WA
  3. Select Outpatient Services IncGlenview, IL
  4. Select Rehabilitation, LLCGlenview, IL

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Yen-Tsun Lai among 97 geriatric medicine (internal medicine) physician records in Washington

Yen-Tsun Lai, M.D. is one of 97 geriatric medicine (internal medicine) physician records with a practice address in Washington. 66% 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 5% of them.

  • NPI issued2006 · 5% of these records are older, 39% newer
  • In a Medicare fileYes · 66% of these records are
  • In the CMS Doctors and Clinicians fileYes · 48% of these records are
  • Graduated2000 · median 2004 among the 47 with a school on file
  • Record last updated2018 · 73% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0300X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Geriatric Medicine (Internal Medicine) Physician providers in Washington

There are 97 geriatric medicine (internal medicine) physician records in Washington.

All 97 in Washington → Every provider in Renton → Geriatric Medicine (Internal Medicine) Physician nationwide →

The 8 geriatric medicine (internal medicine) physician records with the nearest ZIP codes

  1. Lee Burnside, M.D.Renton, WA 980571497744684
  2. Arti Tayade, M.D.Redmond, WA 980531134296452
  3. John Addison, MDMercer Island, WA 980401659323087
  4. Neeti Mittal, MDMercer Island, WA 980401023069317
  5. Vernan AtienzaKirkland, WA 980341851402440
  6. Marissa Black, M.D.Kirkland, WA 980341114269735
  7. Arthur Israel, MDKirkland, WA 980341255313185
  8. Richard Lipsky, MDKirkland, WA 980341689656563

Common questions

What is Yen-Tsun Lai, M.D.'s NPI number?

Yen-Tsun Lai, M.D.'s National Provider Identifier (NPI) is 1790727535, issued on Jun 12, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Yen-Tsun Lai, M.D. located?

The NPPES record lists a practice address at 4033 Talbot RD S Ste 570, Renton, WA, 98055. Phone: (425) 690-3489. Providers update this record themselves, so call before visiting.

How can I verify Yen-Tsun Lai, M.D.'s license?

NPPES lists Washington license number MD00042518, 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 Yen-Tsun Lai, M.D. prescribe under Medicare Part D?

In 2024, Yen-Tsun Lai, M.D. had 6,833 Medicare Part D claims for 878 beneficiaries; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.