John Leung, M.D.
Gastroenterology Physician · Boston, MA
John Leung, M.D. is a gastroenterology physician with a practice address in Boston, Massachusetts, and NPI 1447328711, issued on Dec 2, 2006. Check the license (Massachusetts 230907, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- John Leung
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 230907 MA
Self-reported in NPPES; status is on the state search - Practice location
- 65 Harrison Ave Ste 201, Boston, MA 02111
- Phone
- (617) 804-6767
- Enumerated
- Dec 2, 2006
- Record last updated
- Jul 28, 2022
- Fax
- (877) 726-8492
- Medicare enrollment
- Enrolled (PECOS I20100727000640); accepts Medicare assignment
- Medical or professional school
- University Of Michigan Medical School, 2004
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 686 in Massachusetts → Look up another NPI →
Verify John Leung in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 230907Check 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 gastroenterology physician in 2024
630 Medicare Part D claims for 114 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 31% of claims.
Most prescribed
- Omeprazole56 claims
- Dupixent Pen45 claims
- Famotidine34 claims
- Nortriptyline Hcl30 claims
- Cromolyn Sodium29 claims
- Cholestyramine26 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: $154,325.63
292 payments; by number, the most common kind was food and beverage; the largest payer was Genzyme Corporation. The 13,350 providers of this specialty with any payment received $5,015.95 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
- Boston Food Allergy Center LLC BI NetworkBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Leung among 686 gastroenterology physician records in Massachusetts
John Leung, M.D. is one of 686 gastroenterology physician records with a practice address in Massachusetts. 80% 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 14% of them.
- NPI issued2006 · 14% of these records are older, 49% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2004 · median 2004 among the 491 with a school on file
- Record last updated2022 · 66% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Massachusetts
There are 686 gastroenterology physician records in Massachusetts.
All 686 in Massachusetts → Every provider in Boston → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Harmony Allison, MDBoston, MA 021111245240704
- Peter Bonis, M.D.Boston, MA 021111548462807
- Aaron Dickstein, M.D.Boston, MA 021111003059239
- Daria Homenko, M.D.Boston, MA 021111891958385
- Allen Hwang, M.D., M.S.C.E.Boston, MA 021111558532689
- Sushrut Jangi, MDBoston, MA 021111376770115
- Douglas Janowski, M.D.Boston, MA 021111700803855
- Raffi Karagozian, MDBoston, MA 021111356394233
Common questions
What is John Leung, M.D.'s NPI number?
John Leung, M.D.'s National Provider Identifier (NPI) is 1447328711, issued on Dec 2, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Leung, M.D. located?
The NPPES record lists a practice address at 65 Harrison Ave Ste 201, Boston, MA, 02111. Phone: (617) 804-6767. Providers update this record themselves, so call before visiting.
How can I verify John Leung, M.D.'s license?
NPPES lists Massachusetts license number 230907, 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 John Leung, M.D. prescribe under Medicare Part D?
In 2024, John Leung, M.D. had 630 Medicare Part D claims for 114 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.