Are you Dr. Ouyang? This profile is yours to edit: update your address, phone, photo and services.
Edit this profileAt a glance
- 500 University Dr, Hershey, PA 17033
About Dr. Ouyang
Based in Hershey, PA, Ann Ouyang, MD is listed in the NPI registry under gastroenterology. According to Medicare claims data, Ann cared for 138 Medicare patients across 139 services. The services billed most often include study of esophagus to assess movement, monitoring and recording of esophageal function through nasal tube with electrode, and study of rectum sensitivity and function. NPI 1104884238 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
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
- (717) 531-4950
- Email not available
Practice Locations
500 UNIVERSITY DR
Hershey, PA 17033
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
139 services · 138 patients · 5 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Study of esophagus to assess movement | Treatment | 91010 |
36 | More often than most peers in Gastroenterology |
| Monitoring and recording of esophageal function through nasal tube with electrode | Treatment | 91037 |
33 | More often than most peers in Gastroenterology |
| Study of rectum sensitivity and function | Treatment | 91122 |
26 | As often as other peers in Gastroenterology |
| Test for tone and sensation of rectum and anus | Treatment | 91120 |
26 | As often as other peers in Gastroenterology |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
18 | Less often than most 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 2
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 Hershey 8
Same specialty, same city.
More connections — 23 related providers in 3 groups
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 1974 at Other 7
Providers who graduated from the same medical school in the same year.
Also performs Study of esophagus to assess movement 8
Providers in PA who bill this service to Medicare most often.
Common questions
What is Dr. Ouyang's specialty?
Dr. Ouyang is a gastroenterologist in Hershey, PA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Gastroenterology”.
NPI registry
Where can I find Dr. Ouyang?
Dr. Ouyang is listed at 500 University Dr, Hershey, PA 17033. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Ouyang?
The number on file is (717) 531-4950. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Ouyang's NPI number?
Dr. Ouyang's National Provider Identifier is 1104884238. 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
What is Dr. Ouyang's medical education?
Dr. Ouyang attended Other, graduating in 1974. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Ouyang been practicing?
Dr. Ouyang has 52 years experience. Calculated from a graduation year of 1974, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Ouyang known for?
According to Medicare billing data, Dr. Ouyang provides treatments such as study of esophagus to assess movement and monitoring and recording of esophageal function through nasal tube with electrode, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Ouyang confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Ouyang. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.