Lewis Tsai
Family Medicine Physician · Round Rock, TX
Lewis Tsai is a family medicine physician with a practice address in Round Rock, Texas, and NPI 1538620810, issued on Mar 28, 2019. Check the license (Texas V2584, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Lewis Tsai
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- V2584 TX
Self-reported in NPPES; status is on the state search - Practice location
- 7200 Wyoming Springs Dr Ste 600, Round Rock, TX 78681
- Phone
- (512) 244-1995
- Enumerated
- Mar 28, 2019
- Record last updated
- Jan 8, 2026
- Fax
- (877) 215-6813
- Medicare enrollment
- Enrolled (PECOS I20240822004663); accepts Medicare assignment
- Medical or professional school
- Texas A & M University System, Hsc, College Of Medicine, 2019
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 11,119 in Texas → Look up another NPI →
Also registered at 7200 Wyoming Springs Dr Ste 600
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ragan King, PA-CPhysician Assistant1164249223
- Brian OhareFamily Medicine Physician1871456947
- Mitchell Wong, MDFamily Medicine Physician1184150138
Verify Lewis Tsai in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license V2584Check 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 family medicine physician in 2024
61 Medicare Part D claims for 40 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 26% of 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 2 group practices
- Family Medicine Associates OF Round Rock, P.A.Round Rock, TX
- Tmc Provider Group PLLCAustin, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Lewis Tsai among 11,119 family medicine physician records in Texas
Lewis Tsai is one of 11,119 family medicine physician records with a practice address in Texas. 82% 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 85% of them.
- NPI issued2019 · 85% of these records are older, 12% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2019 · median 2004 among the 7,095 with a school on file
- Record last updated2026 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
86 family medicine physician records list a practice address in Round Rock
They are 86 of the 3,815 NPPES records with a practice address in Round Rock, and 11,119 family medicine physician records in Texas.
All 11,119 in Texas → Every provider in Round Rock → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Norma Anderson, M.D.Round Rock, TX 786811013953736
- James Boyd, M.D.Round Rock, TX 786811629073929
- Elbert David, M.D.Round Rock, TX 786811861494924
- Flint Deshazo, M.D.Round Rock, TX 786811669474623
- David Diaz, M.D.Round Rock, TX 786811033106380
- Bryan Irvin, MDRound Rock, TX 786811831104991
- Atsushi Matsubara, M.D.Round Rock, TX 786811871535195
- William Meiser, D.O.Round Rock, TX 786811962428482
Common questions
What is Lewis Tsai's NPI number?
Lewis Tsai's National Provider Identifier (NPI) is 1538620810, issued on Mar 28, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Lewis Tsai located?
The NPPES record lists a practice address at 7200 Wyoming Springs Dr Ste 600, Round Rock, TX, 78681. Phone: (512) 244-1995. Providers update this record themselves, so call before visiting.
How can I verify Lewis Tsai's license?
NPPES lists Texas license number V2584, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Lewis Tsai prescribe under Medicare Part D?
In 2024, Lewis Tsai had 61 Medicare Part D claims for 40 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.