Doctor profile · Federal record
Dr. John Leung, M.D.
Gastroenterology Physician (CMS: Gastroenterology) · Clinical & Laboratory Immunology (Allergy & Immunology) Physician · Allergy & Immunology Physician · Internal Medicine Physician · Boston, MA
- NPI 1447328711
- Accepts Medicare
- 22 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 3 locations .
- Primary practice
-
65 Harrison Ave Ste 201
Boston, MA 021111924
(617) 804-6767
fax (877) 726-8492 - Additional location
-
1 Nassau St Unit 1906
Boston, MA 021111587 - Additional location
-
800 Washington Street, Box 1013
Boston, MA 021111542
(734) 846-4910 - Mailing address
-
1 Nassau St Unit 1906
Boston, MA 021111587
Credentials & registration
- NPI registered
- December 2006 — 20 yrs on file
- Profile last updated
- July 28, 2022
- Year of graduation
- 2004 — 22 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- Massachusetts #230907
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1447328711. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
262
Distinct HCPCS
4
Medicare allowed
$32,521
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 146 | 65 | $119 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 57 | 57 | $173 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 46 | 30 | $82 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 13 | 13 | $119 |
In context: peer comparison
Among 78 peers in this city , average services per provider: 56. This provider delivers 4.7× the peer median.Open Payments
Industry payments received
All-time total
$154,326
Transactions
266
Manufacturers
15
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| GENZYME CORPORATION | 32 | $64,964.03 | |
| Regeneron Healthcare Solutions, Inc. | 42 | $36,591.95 | |
| ABBVIE INC. | 49 | $21,683.83 | |
| Takeda Pharmaceuticals U.S.A., Inc. | 31 | $11,321.50 | |
| Regeneron Pharmaceuticals, Inc. | 4 | $6,003.75 | |
| Genentech USA, Inc. | 8 | $5,690.24 | |
| E.R. Squibb & Sons, L.L.C. | 3 | $4,264.34 | |
| Celgene Corporation | 11 | $919.91 | |
| AstraZeneca Pharmaceuticals LP | 25 | $764.51 | |
| PFIZER INC. | 14 | $380.14 | |
| QOL Medical, LLC | 9 | $290.58 | |
| Phathom Pharmaceuticals, Inc. | 8 | $283.98 | |
| Novartis Pharmaceuticals Corporation | 10 | $212.13 | |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC | 9 | $174.01 | |
| GlaxoSmithKline, LLC. | 11 | $167.86 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
270
Patients
40
Total drug cost
$164,943
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Omeprazole | Generic | 37 | 19 | $1,099 |
| Nortriptyline Hcl | Generic | 33 | 0 | $218 |
| Montelukast Sodium | Generic | 26 | 0 | $456 |
| Gavilyte-G (Peg3350/Sod Sulf,bicarb,cl/Kcl) | Brand | 23 | 21 | $381 |
| Triamcinolone Acetonide | Generic | 22 | 0 | $352 |
| Dupixent Pen (Dupilumab) | Brand | 19 | 0 | $146,182 |
| Cholestyramine (Cholestyramine (With Sugar)) | Brand | 17 | 0 | $1,609 |
| Azelastine Hcl | Generic | 15 | 0 | $299 |
| Cromolyn Sodium | Generic | 14 | 0 | $5,351 |
| Ipratropium Bromide | Generic | 14 | 0 | $703 |
Frequently asked questions
What is Dr. John Leung's medical specialty?
Dr. John Leung practices Gastroenterology Physician in Boston, MA.
Where does Dr. John Leung practice?
Dr. John Leung practices at 65 Harrison Ave Ste 201, Boston, MA 021111924. Office phone: 6178046767.
What is Dr. John Leung's NPI?
Dr. John Leung's National Provider Identifier (NPI) is 1447328711, issued by NPPES.
Does Dr. John Leung accept Medicare assignment?
Yes. Dr. John Leung accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. John Leung commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); New patient office or other outpatient visit (HCPCS 99204); Established patient office or other outpatient visit (HCPCS 99213). Source: CMS Medicare Physician & Other Practitioners file.