Thomas Xu, M.D.
Internal Medicine Physician · Wilton, CT
Thomas Xu, M.D. is an internal medicine physician with a practice address in Wilton, Connecticut, and NPI 1972881050, issued on Jul 24, 2011. Check the license on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Thomas Xu
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- Practice location
- 372 Danbury RD Ste 197, Wilton, CT 06897
- Phone
- (203) 276-3366
- Enumerated
- Jul 24, 2011
- Entity
- Type 1 · individual
Also registered at 372 Danbury RD Ste 197
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sally Bergwerk, MDInternal Medicine Physician1205863560
- Bruce Colet, MDInternal Medicine Physician1518547959
- Jeremiah Lewis, M.D.Internal Medicine Physician1497747968
- Michele Olbrys, P.A.Physician Assistant1164494407
- Maria Restrepo, MDInternal Medicine Physician1386607265
Verify Thomas Xu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining BoardCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
54% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,274 Medicare Part D claims for 178 beneficiaries, against an average of 2,785 among the 127,794 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium203 claims
- Lisinopril92 claims
- Amlodipine Besylate82 claims
- Levothyroxine Sodium71 claims
- Rosuvastatin Calcium70 claims
- Losartan Potassium60 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.
The practice group's Medicare quality score for 2023: 79.1 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
One hospital or facility affiliation
- Stamford Health Medical Group IncWilton, CT
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
22 internal medicine physician records list a Wilton practice address
They are 22 of the 435 NPPES records with a Wilton practice address, and 2,830 internal medicine physician records in Connecticut.
All 22 in Wilton → All 2,830 in Connecticut → Every provider in Wilton →
Other internal medicine physician records in Connecticut
- Christina AbavanaBridgeport, CT1508206574
- Hoda Abdel Salam, M.D.New Britain, CT1144509316
- Gada Abdelhafiz, MDNew London, CT1467649558
- Mahmoud Abdelrahman, MDBridgeport, CT1467072868
- Simon Abi-SalehBridgeport, CT1891315529
- Gerard Abidor, D.O.Bridgeport, CT1518014539
- Richard Abraham, M.D.Canton, CT1023044252
- Odaliz Abreu-Lanfranco, MDNew Haven, CT1538276134
- Nila Aburto, MDStamford, CT1396325718
- Angelo Accomando, M.D.East Haven, CT1063454247
Common questions
What is Thomas Xu, M.D.'s NPI number?
Thomas Xu, M.D.'s National Provider Identifier (NPI) is 1972881050, issued on Jul 24, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Xu, M.D. located?
The NPPES record lists a practice address at 372 Danbury RD Ste 197, Wilton, CT, 06897. Phone: (203) 276-3366. Providers update this record themselves, so call before visiting.
How can I verify Thomas Xu, M.D.'s license?
Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Thomas Xu, M.D. prescribe under Medicare Part D?
In 2024, Thomas Xu, M.D. had 1,274 Medicare Part D claims for 178 beneficiaries; the average among internal medicine physician prescribers was 2,785. Part D covers Medicare prescriptions only.
What is Thomas Xu, M.D.'s Medicare quality score?
The 2023 MIPS final score is 79.1 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.