Ann Ouyang, MD
Gastroenterology Physician · Hershey, PA
Ann Ouyang, MD is a gastroenterology physician with a practice address in Hershey, Pennsylvania, and NPI 1104884238, issued on May 1, 2006. Check the license (Pennsylvania MD036717L, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Ann Ouyang
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- MD036717L PA
Self-reported in NPPES; status is on the state search - Practice location
- 500 University Dr, Hershey, PA 17033
- Phone
- (717) 531-4950
- Enumerated
- May 1, 2006
- Record last updated
- Jul 5, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (717) 531-4870
- Medicaid ID
- 0006843800002 PA
- Medicare enrollment
- Enrolled (PECOS I20101213000509); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 1,049 in Pennsylvania → Look up another NPI →
Also registered at 500 University Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Aiza Abbas, MDStudent in an Organized Health Care Education/Training Program1164312500
- Fatemeh Abbasi, MDPulmonary Disease Physician1750878625
- Andrea Abbe, LDNRegistered Dietitian1366623795
- Mahdi Abdallah, MDStudent in an Organized Health Care Education/Training Program1497457360
- Ashraf Abdelhalim, MDAnesthesiology Physician1356931729
Verify Ann Ouyang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD036717LCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 71.8 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).
Bills Medicare through one group practice
- The Milton S Hershey Medical Center Physicians GroupHershey, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ann Ouyang among 1,049 gastroenterology physician records in Pennsylvania
Ann Ouyang, MD is one of 1,049 gastroenterology physician records with a practice address in Pennsylvania. 85% 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, 47% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated1974 · median 2003 among the 769 with a school on file
- Record last updated2018 · 63% 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 Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
35 gastroenterology physician records list a practice address in Hershey
They are 35 of the 3,972 NPPES records with a practice address in Hershey, and 1,049 gastroenterology physician records in Pennsylvania.
All 1,049 in Pennsylvania → Every provider in Hershey → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Deborah Bethards, M.D.Hershey, PA 170331659306561
- Wilmot Burch, M.D.Hershey, PA 170331700813276
- Kofi Clarke, M.D.Hershey, PA 170331841254851
- Brian Dodson, M.D.Hershey, PA 170331710905823
- Nicholas Inverso, M.D.Hershey, PA 170331396704086
- Abraham Mathew, MDHershey, PA 170331851349443
- Thomas McGarrity, MDHershey, PA 170331316995996
- Thomas Riley, MDHershey, PA 170331689622581
Common questions
What is Ann Ouyang, MD's NPI number?
Ann Ouyang, MD's National Provider Identifier (NPI) is 1104884238, issued on May 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ann Ouyang, MD located?
The NPPES record lists a practice address at 500 University Dr, Hershey, PA, 17033. Phone: (717) 531-4950. Providers update this record themselves, so call before visiting.
How can I verify Ann Ouyang, MD's license?
NPPES lists Pennsylvania license number MD036717L, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Ann Ouyang, MD's MIPS final score?
The 2023 MIPS final score is 71.8 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.