Catherine S. Yu, M.D.
Internal Medicine Physician · Boston, MA
Catherine S. Yu, M.D. is an internal medicine physician with a practice address in Boston, Massachusetts, and NPI 1548228455, issued on May 2, 2006. Check the license (Massachusetts 216442, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Catherine S. Yu
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 216442 MA
Self-reported in NPPES; status is on the state search - Practice location
- 332 Hanover St, Boston, MA 02113
- Phone
- (617) 643-8000
- Enumerated
- May 2, 2006
- Record last updated
- Apr 15, 2026
- Medicaid ID
- 2109972 MA
- Medicare enrollment
- Enrolled (PECOS I20050921000615); accepts Medicare assignment
- Medical or professional school
- University Of Massachusetts Medical School, 2005
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 332 Hanover St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Harriet Crary, LICSWClinical Social Worker1306902192
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Verify Catherine S. Yu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 216442Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
9% more Medicare Part D claims than the average internal medicine physician in 2024
3,476 Medicare Part D claims for 272 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 27% of claims. 13 claims were for opioids.
Most prescribed
- Lisinopril158 claims
- Atorvastatin Calcium136 claims
- Biktarvy135 claims
- Triumeq127 claims
- Omeprazole118 claims
- Metformin Hcl114 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.
Industry payments in 2024: $39.96
1 payment: food and beverage; the largest payer was ViiV Healthcare Company. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Lowell Community Health Center, Inc.Lowell, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Catherine S. Yu among 6,825 internal medicine physician records in Massachusetts
Catherine S. Yu, M.D. is one of 6,825 internal medicine physician records with a practice address in Massachusetts. 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 12% of them.
- NPI issued2006 · 12% of these records are older, 54% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2005 · median 2004 among the 4,103 with a school on file
- Record last updated2026 · 64% 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 Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
2,320 internal medicine physician records list a practice address in Boston
They are 2,320 of the 41,865 NPPES records with a practice address in Boston, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Boston → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Catherine Buettner, MDBoston, MA 021131487692604
- John Foster, MDBoston, MA 021131194716753
- Ottavio Nardone, M.D.Boston, MA 021131952389892
- Rebecca Patel, MD, MPHBoston, MA 021131336313899
- Diane Rich, MDBoston, MA 021131013991942
- Jaime Chang, MDBoston, MA 021141205825197
- James Evans, MDBoston, MA 021141215939533
- Nicolette Fontaine, MDBoston, MA 021141841287174
Common questions
What is Catherine S. Yu, M.D.'s NPI number?
Catherine S. Yu, M.D.'s National Provider Identifier (NPI) is 1548228455, issued on May 2, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Catherine S. Yu, M.D. located?
The NPPES record lists a practice address at 332 Hanover St, Boston, MA, 02113. Phone: (617) 643-8000. Providers update this record themselves, so call before visiting.
How can I verify Catherine S. Yu, M.D.'s license?
NPPES lists Massachusetts license number 216442, 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 Catherine S. Yu, M.D. prescribe under Medicare Part D?
In 2024, Catherine S. Yu, M.D. had 3,476 Medicare Part D claims for 272 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.