Doctor profile · Federal record
Dr. Matthew Chang, M.D.
Gastroenterology Physician (CMS: Gastroenterology) · Internal Medicine Physician · Internal Medicine Physician · Palo Alto, CA
- NPI 1598949521
- Accepts Medicare
- 20 yrs in practice
- Licensed in 3 states
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
900 Blake Wilbur Dr
Palo Alto, CA 943042201
(650) 736-5555
Credentials & registration
- NPI registered
- December 2007 — 19 yrs on file
- Profile last updated
- December 17, 2021
- Year of graduation
- 2006 — 20 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State licenses (3)
- California #A133674 · Massachusetts #250090 · New York #245746
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1598949521. Last verified May 11, 2026.Open Payments
Industry payments received
All-time total
$24
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Abbvie INC. | 1 | $24.05 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
479
Patients
310
Total drug cost
$160,158
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Gavilyte-C (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 276 | 274 | $5,900 |
| Pantoprazole Sodium | Generic | 62 | 36 | $2,655 |
| Xifaxan (Rifaximin) | Brand | 39 | 0 | $142,503 |
| Ursodiol | Generic | 31 | 0 | $6,012 |
| Omeprazole | Generic | 18 | 0 | $273 |
| Lactulose | Generic | 17 | 0 | $1,098 |
| Azathioprine | Generic | 13 | 0 | $303 |
| Furosemide | Generic | 12 | 0 | $132 |
| Twinrix (Hepatitis A and B Vaccine/Pf) | Brand | 11 | 0 | $1,281 |
Frequently asked questions
What is Dr. Matthew Chang's medical specialty?
Dr. Matthew Chang practices Gastroenterology Physician in Palo Alto, CA.
Where does Dr. Matthew Chang practice?
Dr. Matthew Chang practices at 900 Blake Wilbur Dr, Palo Alto, CA 943042201. Office phone: 6507365555.
What is Dr. Matthew Chang's NPI?
Dr. Matthew Chang's National Provider Identifier (NPI) is 1598949521, issued by NPPES.
Does Dr. Matthew Chang accept Medicare assignment?
Yes. Dr. Matthew Chang accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.