Physician Profile
John Leung, M.D.
Unclaimed ProfileAbout Dr. Leung
Based in Boston, MA, John Leung, M.D. is listed in the NPI registry under gastroenterology. John graduated from University of Michigan Medical School in 2004. John is also listed as specializing in clinical & laboratory immunology, allergy & immunology, and internal medicine. Medicare claims data shows John provided 1,046 services to 181 patients. The services billed most often include test for allergy using allergenic extract, established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, and new patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (617) 804-6767
- Email not available
Practice Locations
65 HARRISON AVE STE 201
Boston, MA 02111
1 Nassau St Unit 1906
Boston, MA 02111
800 Washington Street Box 1013
Boston, MA 02111
Conditions Commonly Evaluated or Treated
Within Gastroenterology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
- Acid reflux
- Celiac disease
- Crohn's disease
- Hemorrhoids
- IBS
- Swallowing difficulties
- Ulcerative colitis
Biliary and pancreas
Colon and anorectal
Esophagus and swallowing
Functional bowel and motility
Liver
- Ascites
- Autoimmune hepatitis
- Cirrhosis
- Fatty liver disease
- Hemochromatosis
- Hepatitis B
- Hepatitis C
- Portal hypertension
Stomach and duodenum
Bowel & Colon
Digestive Symptoms
Gallbladder & Bile Ducts
Procedures & services
Most searched procedures
Lower endoscopy
Upper endoscopy
Capsule and physiology testing
Diagnostic Testing
Liver procedures
Treatments
Procedures Most Often Billed to Medicare
1,046 services · 181 patients · 4 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Test for allergy using allergenic extract | Treatment | 95004 |
753 | |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
173 | More often than most peers in Gastroenterology |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
69 | More often than most peers in Gastroenterology |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
51 | As often as other peers in Gastroenterology |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Related specialists at this location 1
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other gastroenterologists in Boston 8
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at University of Michigan Medical School 8
Other providers in the same specialty who trained at the same institution.
Class of 2004 at University of Michigan Medical School 8
Providers who graduated from the same medical school in the same year.
Also performs Test for allergy using allergenic extract 8
Providers in MA who bill this service to Medicare most often.
Common questions
What kind of doctor is John Leung?
John Leung is a gastroenterologist in Boston, MA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Gastroenterology”.
NPI registry
What is John Leung's address?
John Leung is listed at 65 Harrison Ave Ste 201, Boston, MA 02111. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with John Leung?
The number on file is (617) 804-6767. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for John Leung?
John Leung's National Provider Identifier is 1447328711. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did John Leung train?
John Leung attended University of Michigan Medical School, graduating in 2004. This comes from the CMS National Downloadable File.
CMS public data
How much experience does John Leung have?
John Leung has 22 years experience. Calculated from a graduation year of 2004, reported in the CMS National Downloadable File.
CMS public data
What procedures does John Leung perform?
According to Medicare billing data, John Leung provides treatments such as test for allergy using allergenic extract, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is John Leung's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by John Leung. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.