Doctor profile · Federal record
Dr. Mary Elizabeth Clark, M.D.
Gastroenterology Physician (CMS: Gastroenterology) · San Francisco, CA
- NPI 1225109770
- Accepts Medicare
- 25 yrs in practice
- Female
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
2333 Buchanan St, Suite 5823
San Francisco, CA 941151925
(415) 644-5752
Credentials & registration
- NPI registered
- November 2006 — 20 yrs on file
- Profile last updated
- January 13, 2022
- Year of graduation
- 2001 — 25 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- California #A98304
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1225109770. Last verified May 11, 2026.Open Payments
Industry payments received
All-time total
$43
Transactions
2
Manufacturers
2
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| CapsoVision, INC. | 1 | $21.57 | |
| TerSera Therapeutics LLC | 1 | $21.49 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
825
Patients
542
Total drug cost
$191,488
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Gavilyte-C (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 461 | 455 | $9,635 |
| Pantoprazole Sodium | Generic | 64 | 25 | $1,176 |
| Omeprazole | Generic | 40 | 23 | $695 |
| Xifaxan (Rifaximin) | Brand | 40 | 27 | $89,251 |
| Famotidine | Generic | 28 | 12 | $402 |
| Esomeprazole Magnesium | Generic | 24 | 0 | $1,020 |
| Cholestyramine (Cholestyramine (With Sugar)) | Brand | 23 | 0 | $881 |
| Motegrity (Prucalopride Succinate) | Brand | 23 | 0 | $28,358 |
| Lialda (Mesalamine) | Brand | 22 | 0 | $11,112 |
| Ondansetron Odt (Ondansetron) | Brand | 19 | 0 | $240 |
Frequently asked questions
What is Dr. Mary Elizabeth Clark's medical specialty?
Dr. Mary Elizabeth Clark practices Gastroenterology Physician in San Francisco, CA.
Where does Dr. Mary Elizabeth Clark practice?
Dr. Mary Elizabeth Clark practices at 2333 Buchanan St, San Francisco, CA 941151925. Office phone: 4156445752.
What is Dr. Mary Elizabeth Clark's NPI?
Dr. Mary Elizabeth Clark's National Provider Identifier (NPI) is 1225109770, issued by NPPES.
Does Dr. Mary Elizabeth Clark accept Medicare assignment?
Yes. Dr. Mary Elizabeth Clark accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.