Karl L. Uy, M.D.
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Worcester, MA
Karl L. Uy, M.D. is a thoracic surgery (cardiothoracic vascular surgery) physician with a practice address in Worcester, Massachusetts, and NPI 1548226723, issued on Apr 25, 2006. Check the license (Massachusetts 226716, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Karl L. Uy
- Credential
- M.D.
- Primary taxonomy
- Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X
- License number
- 226716 MA
Self-reported in NPPES; status is on the state search - Practice location
- 67 Belmont St, Worcester, MA 01605
- Phone
- (508) 334-8996
- Enumerated
- Apr 25, 2006
- Record last updated
- Nov 16, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (508) 334-6296
- Medicaid ID
- 110042059A MA
- Medicare enrollment
- Enrolled (PECOS I20060214000135); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest thoracic surgery (cardiothoracic vascular surgery) physician records → All 228 in Massachusetts → Look up another NPI →
Also registered at 67 Belmont St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Karl L. Uy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 226716Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
47% fewer Medicare Part D claims than the average thoracic surgery (cardiothoracic vascular surgery) physician in 2024
54 Medicare Part D claims for 33 beneficiaries, against an average of 101 among the 2,587 providers of this specialty who prescribed in Part D. 12 claims were for opioids.
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 MIPS final score for 2023 (Medicare payment program): 97 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $66.60
2 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 4,047 providers of this specialty with any payment received $7,828.84 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Umass Memorial Medical Group IncWorcester, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karl L. Uy among 228 thoracic surgery (cardiothoracic vascular surgery) physician records in Massachusetts
Karl L. Uy, M.D. is one of 228 thoracic surgery (cardiothoracic vascular surgery) physician records with a practice address in Massachusetts. 68% 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 19% of them.
- NPI issued2006 · 19% of these records are older, 51% newer
- In a Medicare fileYes · 68% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated1989 · median 1998 among the 131 with a school on file
- Record last updated2020 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208G00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician providers in Massachusetts
There are 228 thoracic surgery (cardiothoracic vascular surgery) physician records in Massachusetts.
All 228 in Massachusetts → Every provider in Worcester → Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician nationwide →
The 8 thoracic surgery (cardiothoracic vascular surgery) physician records with the nearest ZIP codes
- Geoffrey Graeber, M.D.Worcester, MA 016051154415875
- Feiran Lou, M.D.Worcester, MA 016051295997831
- Mark Maxfield, M.D.Worcester, MA 016051073757001
- Angelo Pezzella, M.D.Worcester, MA 016051215976303
- William Phillips, M.D.Worcester, MA 016051609260793
- Robert Bojar, M.D.Worcester, MA 016081639111032
- James Fingleton, MDWorcester, MA 016081265438709
- Michael O'Shea, M.D.Worcester, MA 016081164481404
Common questions
What is Karl L. Uy, M.D.'s NPI number?
Karl L. Uy, M.D.'s National Provider Identifier (NPI) is 1548226723, issued on Apr 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Karl L. Uy, M.D. located?
The NPPES record lists a practice address at 67 Belmont St, Worcester, MA, 01605. Phone: (508) 334-8996. Providers update this record themselves, so call before visiting.
How can I verify Karl L. Uy, M.D.'s license?
NPPES lists Massachusetts license number 226716, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Karl L. Uy, M.D. prescribe under Medicare Part D?
In 2024, Karl L. Uy, M.D. had 54 Medicare Part D claims for 33 beneficiaries; the average among thoracic surgery (cardiothoracic vascular surgery) physician prescribers was 101. Part D covers Medicare prescriptions only.
What is Karl L. Uy, M.D.'s MIPS final score?
The 2023 MIPS final score is 97 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.