Mei Sun, M.D.
Internal Medicine Physician · Boston, MA
Mei Sun, M.D. is an internal medicine physician with a practice address in Boston, Massachusetts, and NPI 1164799599, issued on Nov 30, 2011. Check the license (Massachusetts 260289, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Mei Sun
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 260289 MA
125060520 IL
Self-reported in NPPES; status is on the state search - Practice location
- 71 Commercial St # 61, Boston, MA 02109
- Phone
- (781) 454-5212
- Enumerated
- Nov 30, 2011
- Record last updated
- May 6, 2015 (not updated in 11 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20150109001388); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Verify Mei Sun in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 260289Check 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
3,464 Medicare Part D claims for 433 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 26 claims were for opioids.
Most prescribed
- Atorvastatin Calcium301 claims
- Lisinopril199 claims
- Amlodipine Besylate156 claims
- Levothyroxine Sodium155 claims
- Metoprolol Succinate114 claims
- Omeprazole112 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 one group practice
- Chelmsford Primary Care LLCChelmsford, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mei Sun among 6,825 internal medicine physician records in Massachusetts
Mei Sun, 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 2011, is newer than 65% of them.
- NPI issued2011 · 65% of these records are older, 33% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1988 · median 2004 among the 4,103 with a school on file
- Record last updated2015 · 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
- Talia Herman, M.D.Boston, MA 021091881662369
- Helen Hunt, M.D.Boston, MA 021091194793695
- Erin Jospe, M.D.Boston, MA 021091033224092
- Julie Kaufman, M.D.Boston, MA 021091487622536
- Kathleen Kennedy McCarey, NPBoston, MA 021091326051582
- David Krieger, M.D.Boston, MA 021091346219326
- Jeffrey Levin-Scherz, MD MBABoston, MA 021091699702555
- Kenneth Luna, D.O.Boston, MA 021091033183298
Common questions
What is Mei Sun, M.D.'s NPI number?
Mei Sun, M.D.'s National Provider Identifier (NPI) is 1164799599, issued on Nov 30, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Mei Sun, M.D. located?
The NPPES record lists a practice address at 71 Commercial St # 61, Boston, MA, 02109. Phone: (781) 454-5212. Providers update this record themselves, so call before visiting.
How can I verify Mei Sun, M.D.'s license?
NPPES lists Massachusetts license number 260289, 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 Mei Sun, M.D. prescribe under Medicare Part D?
In 2024, Mei Sun, M.D. had 3,464 Medicare Part D claims for 433 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.