Doctor profile · Federal record
Dr. Chun Ouyang, M.D., PH.D.
Internal Medicine Physician (CMS: Gastroenterology) · Walnut Creek, CA
- NPI 1336115328
- Accepts Medicare
- 34 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1425 S Main St, Kaiser Foundation Hospital, GI Division
Walnut Creek, CA 945965318
(925) 295-4020
Credentials & registration
- NPI registered
- February 2006 — 20 yrs on file
- Profile last updated
- December 13, 2021
- Year of graduation
- 1992 — 34 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- Massachusetts #217077
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1336115328. Last verified May 11, 2026.Open Payments
Industry payments received
All-time total
$22
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| CapsoVision, INC. | 1 | $21.57 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
905
Patients
628
Total drug cost
$200,272
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Gavilyte-C (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 563 | 559 | $11,845 |
| Entecavir | Generic | 39 | 11 | $2,485 |
| Pantoprazole Sodium | Generic | 32 | 19 | $1,007 |
| Omeprazole | Generic | 28 | 14 | $302 |
| Cholestyramine (Cholestyramine (With Sugar)) | Brand | 26 | 14 | $1,296 |
| Esomeprazole Magnesium | Generic | 26 | 11 | $521 |
| Tenofovir Disoproxil Fumarate | Generic | 26 | 0 | $1,478 |
| Famotidine | Generic | 25 | 0 | $347 |
| Lactulose | Generic | 25 | 0 | $885 |
| Budesonide Dr (Budesonide) | Brand | 23 | 0 | $1,774 |
Frequently asked questions
What is Dr. Chun Ouyang's medical specialty?
Dr. Chun Ouyang practices Internal Medicine Physician in Walnut Creek, CA.
Where does Dr. Chun Ouyang practice?
Dr. Chun Ouyang practices at 1425 S Main St, Walnut Creek, CA 945965318. Office phone: 9252954020.
What is Dr. Chun Ouyang's NPI?
Dr. Chun Ouyang's National Provider Identifier (NPI) is 1336115328, issued by NPPES.
Does Dr. Chun Ouyang accept Medicare assignment?
Yes. Dr. Chun Ouyang accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.