Doctor profile · Federal record
Dr. Ann Ouyang, MD
Gastroenterology Physician (CMS: Gastroenterology) · Hershey, PA
- NPI 1104884238
- Accepts Medicare
- MIPS 71.8 / 100 · 2023
- 52 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
500 University Dr
Hershey, PA 17033
(717) 531-4950
fax (717) 531-4870 - Mailing address
-
Po Box 858, Mc A410
Hershey, PA 170330858
Credentials & registration
- NPI registered
- May 2006 — 20 yrs on file
- Profile last updated
- July 5, 2018
- Year of graduation
- 1974 — 52 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- Pennsylvania #MD036717L
- Medicaid
- PA #0006843800002
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1104884238. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
102
Distinct HCPCS
4
Medicare allowed
$6,031
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
91010 |
Study of esophagus to assess movement | 36 | 36 | $62 | |
91037 |
Monitoring and recording of esophageal function through nasal tube with electrode | 30 | 30 | $47 | |
91120 |
Test for tone and sensation of rectum and anus | 18 | 18 | $47 | |
91122 |
Study of rectum sensitivity and function | 18 | 18 | $85 |
In context: peer comparison
Among 13 peers in Hershey Gastroenterology Physician, average services per provider: 26. This provider delivers 3.9× the peer median.Frequently asked questions
What is Dr. Ann Ouyang's medical specialty?
Dr. Ann Ouyang practices Gastroenterology Physician in Hershey, PA.
Where does Dr. Ann Ouyang practice?
Dr. Ann Ouyang practices at 500 University Dr, Hershey, PA 17033. Office phone: 7175314950.
What is Dr. Ann Ouyang's NPI?
Dr. Ann Ouyang's National Provider Identifier (NPI) is 1104884238, issued by NPPES.
Does Dr. Ann Ouyang accept Medicare assignment?
Yes. Dr. Ann Ouyang accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Ann Ouyang commonly perform?
Top Medicare-reported procedures in 2023: Study of esophagus to assess movement (HCPCS 91010); Monitoring and recording of esophageal function through nasal tube with electrode (HCPCS 91037); Test for tone and sensation of rectum and anus (HCPCS 91120). Source: CMS Medicare Physician & Other Practitioners file.