Xiaocen Zhang, MD
Gastroenterology Physician · Boston, MA
Xiaocen Zhang, MD is a gastroenterology physician with a practice address in Boston, Massachusetts, and NPI 1336661537, issued on Jul 10, 2017. Check the license (Massachusetts 1013785, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Xiaocen Zhang
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 1013785 MA
Self-reported in NPPES; status is on the state search - Practice location
- 800 Washington St, Boston, MA 02111
- Phone
- (617) 636-5883
- Enumerated
- Jul 10, 2017
- Record last updated
- Feb 5, 2025
- Medicare enrollment
- Enrolled (PECOS I20230630001607); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 686 in Massachusetts → Look up another NPI →
Also registered at 800 Washington St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jeffrey Aalberg, MD, MPHSurgery Physician1326788027
- Omer Abbak, PHARMDPharmacist1114500337
- Aya Abdelnaser, MDStudent in an Organized Health Care Education/Training Program1770425373
- Marie Elise Abi Antoun, MDObstetrics & Gynecology Physician1356042626
- Ahmad AboalfarajSurgery Physician1538517651
- Tala Abu Samaan, MDStudent in an Organized Health Care Education/Training Program1376386250
Verify Xiaocen Zhang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 1013785Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
61% fewer Medicare Part D claims than the average gastroenterology physician in 2024
314 Medicare Part D claims for 181 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims.
Most prescribed
- Gavilyte-G92 claims
- Gavilyte-C32 claims
- Pantoprazole Sodium31 claims
- Omeprazole24 claims
- Famotidine20 claims
- Peg-3350 And Electrolytes14 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: $20.58
1 payment: food and beverage; the largest payer was Mallinckrodt Hospital Products Inc. 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
- Pratt Medical Group IncBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Xiaocen Zhang among 686 gastroenterology physician records in Massachusetts
Xiaocen Zhang, MD 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 2017, is newer than 87% of them.
- NPI issued2017 · 87% of these records are older, 10% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2017 · median 2004 among the 491 with a school on file
- Record last updated2025 · 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 Xiaocen Zhang, MD's NPI number?
Xiaocen Zhang, MD's National Provider Identifier (NPI) is 1336661537, issued on Jul 10, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Xiaocen Zhang, MD located?
The NPPES record lists a practice address at 800 Washington St, Boston, MA, 02111. Phone: (617) 636-5883. Providers update this record themselves, so call before visiting.
How can I verify Xiaocen Zhang, MD's license?
NPPES lists Massachusetts license number 1013785, 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 Xiaocen Zhang, MD prescribe under Medicare Part D?
In 2024, Xiaocen Zhang, MD had 314 Medicare Part D claims for 181 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.