Alan Chen, M.D.
Gastroenterology Physician · Baltimore, MD
Alan Chen, M.D. is a gastroenterology physician with a practice address in Baltimore, Maryland, and NPI 1033539945, issued on Apr 17, 2014. Check the license (Maryland D0089536, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Alan Chen
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- D0089536 MD
Self-reported in NPPES; status is on the state search - Practice location
- 9000 Franklin Square Dr, Baltimore, MD 21237
- Phone
- (443) 777-2475
- Enumerated
- Apr 17, 2014
- Record last updated
- May 15, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20200729001343); accepts Medicare assignment
- Medical or professional school
- Duke University School Of Medicine, 2014
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 505 in Maryland → Look up another NPI →
Also registered at 9000 Franklin Square Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Eric Abbott, PA-CPhysician Assistant1669873089
- Basma Abdo, M.DObstetrics & Gynecology Physician1922302652
- Sean Abeysekera, M.D.Student in an Organized Health Care Education/Training Program1710369251
- Daria Abolghasemi, D.O.Surgical Oncology Physician1265847636
- Jewaher Abubaker, P.A.Physician Assistant1902955198
- Ibukunola Adediji, PAInternal Medicine Physician1386240455
Verify Alan Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0089536Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
52% fewer Medicare Part D claims than the average gastroenterology physician in 2024
392 Medicare Part D claims for 140 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims.
Most prescribed
- Omeprazole79 claims
- Famotidine72 claims
- Pantoprazole Sodium68 claims
- Esomeprazole Magnesium20 claims
- Metoclopramide Hcl16 claims
- Lubiprostone15 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 80.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $256.02
8 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie 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
- Medstar Medical Group II LLCBaltimore, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alan Chen among 505 gastroenterology physician records in Maryland
Alan Chen, M.D. is one of 505 gastroenterology physician records with a practice address in Maryland. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 84% of them.
- NPI issued2014 · 84% of these records are older, 14% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2014 · median 2002 among the 344 with a school on file
- Record last updated2020 · 61% 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 Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Maryland
There are 505 gastroenterology physician records in Maryland.
All 505 in Maryland → Every provider in Baltimore → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Mark Diamond, MDBaltimore, MD 212371912081019
- Albert Fleisher, M.D.Baltimore, MD 212371710971254
- Jahangir Khan, M.D.Baltimore, MD 212371154353027
- Ruben Khan, M.D.Rosedale, MD 212371033552179
- Kenneth Margolis, M.D.Baltimore, MD 212371700826930
- Jose Mari Parungao, M.D.Baltimore, MD 212371447562699
- Valaparambil Sivan, MDBaltimore, MD 212371730119462
- Nicholas Belitsos, MDBaltimore, MD 212361730114398
Common questions
What is Alan Chen, M.D.'s NPI number?
Alan Chen, M.D.'s National Provider Identifier (NPI) is 1033539945, issued on Apr 17, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Alan Chen, M.D. located?
The NPPES record lists a practice address at 9000 Franklin Square Dr, Baltimore, MD, 21237. Phone: (443) 777-2475. Providers update this record themselves, so call before visiting.
How can I verify Alan Chen, M.D.'s license?
NPPES lists Maryland license number D0089536, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Alan Chen, M.D. prescribe under Medicare Part D?
In 2024, Alan Chen, M.D. had 392 Medicare Part D claims for 140 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Alan Chen, M.D.'s MIPS final score?
The 2023 MIPS final score is 80.2 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.