Doctor profile · Federal record
Dr. Samuel Marcus, M.D.
Gastroenterology Physician (CMS: Gastroenterology) · Stanford, CA
- NPI 1396717740
- Accepts Medicare
- MIPS 75.5 / 100 · 2023
- 49 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
300 Pasteur Dr
Stanford, CA 943052200
(650) 723-4000 - Additional location
-
2490 Hospital Dr, Suite 211
Mountain View, CA 94040
(650) 988-7488
fax (650) 988-7486
Credentials & registration
- NPI registered
- February 2006 — 20 yrs on file
- Profile last updated
- April 15, 2024
- Year of graduation
- 1977 — 49 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- California #A50154
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1396717740. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
610
Distinct HCPCS
9
Medicare allowed
$99,684
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 203 | 137 | $151 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 90 | 72 | $106 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 84 | 60 | $211 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 69 | 63 | $131 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 58 | 58 | $167 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 36 | 36 | $289 | |
45378 |
Diagnostic exam of large bowel using a flexible endoscope | 30 | 30 | $210 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 22 | 22 | $130 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 18 | 18 | $197 |
In context: peer comparison
Among 18 peers in Stanford Gastroenterology Physician, average services per provider: 46. This provider delivers 13× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
173
Patients
63
Total drug cost
$12,908
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Omeprazole | Generic | 91 | 35 | $1,448 |
| Famotidine | Generic | 71 | 28 | $1,530 |
| Linzess (Linaclotide) | Brand | 11 | 0 | $9,929 |
Frequently asked questions
What is Dr. Samuel Marcus's medical specialty?
Dr. Samuel Marcus practices Gastroenterology Physician in Stanford, CA.
Where does Dr. Samuel Marcus practice?
Dr. Samuel Marcus practices at 300 Pasteur Dr, Stanford, CA 943052200. Office phone: 6507234000.
What is Dr. Samuel Marcus's NPI?
Dr. Samuel Marcus's National Provider Identifier (NPI) is 1396717740, issued by NPPES.
Does Dr. Samuel Marcus accept Medicare assignment?
Yes. Dr. Samuel Marcus accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Samuel Marcus commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99213); Established patient office or other outpatient visit (HCPCS 99215). Source: CMS Medicare Physician & Other Practitioners file.