Yun Kit Lam, M.D.
Internal Medicine Physician · Boston, MA
Yun Kit Lam, M.D. is an internal medicine physician with a practice address in Boston, Massachusetts, and NPI 1134100894, issued on Nov 9, 2005. Check the license (Massachusetts 81549, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Yun Kit Lam
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 81549 MA
Self-reported in NPPES; status is on the state search - Practice location
- 252 Tremont St, Boston, MA 02116
- Phone
- (617) 636-8871
- Enumerated
- Nov 9, 2005
- Record last updated
- Dec 10, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (617) 636-8870
- Medicaid ID
- 3140776 MA
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 252 Tremont St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Ernst Schaefer, M.D.Endocrinology, Diabetes & Metabolism Physician1083803159
Verify Yun Kit Lam in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 81549Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
22% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,478 Medicare Part D claims for 522 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Atorvastatin Calcium314 claims
- Amlodipine Besylate295 claims
- Losartan Potassium104 claims
- Metformin Hcl95 claims
- Lisinopril92 claims
- Metoprolol Succinate91 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.
Yun Kit Lam among 6,825 internal medicine physician records in Massachusetts
Yun Kit Lam, 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 88% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2009 · 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
- James Bonanno, MDBoston, MA 021161760461115
- Bryan Bordeaux, D.O.Boston, MA 021161972560696
- Moira Cunningham, M.D.Boston, MA 021161437120995
- Federico Erebia, M.D.Boston, MA 021161588639744
- Monica Gomez, MDBoston, MA 021161174585368
- Katherine Lantsman, M.D.Boston, MA 021161720052475
- Frederick LeeBoston, MA 021161295710473
- Christine Lui, M.D.Boston, MA 021161568428407
Common questions
What is Yun Kit Lam, M.D.'s NPI number?
Yun Kit Lam, M.D.'s National Provider Identifier (NPI) is 1134100894, issued on Nov 9, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Yun Kit Lam, M.D. located?
The NPPES record lists a practice address at 252 Tremont St, Boston, MA, 02116. Phone: (617) 636-8871. Providers update this record themselves, so call before visiting.
How can I verify Yun Kit Lam, M.D.'s license?
NPPES lists Massachusetts license number 81549, 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 Yun Kit Lam, M.D. prescribe under Medicare Part D?
In 2024, Yun Kit Lam, M.D. had 2,478 Medicare Part D claims for 522 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.