Doctor profile · Federal record
Dr. Robert Elsen, M.D.
Gastroenterology Physician (CMS: Gastroenterology) · San Francisco, CA
- NPI 1639212624
- Accepts Medicare
- MIPS 78.9 / 100 · 2023
- 40 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
45 Castro St Ste 437
San Francisco, CA 941141029
(415) 469-0643 - Mailing address
-
54 Martha Ave
San Francisco, CA 941312835
Credentials & registration
- NPI registered
- February 2007 — 19 yrs on file
- Profile last updated
- July 8, 2007
- Year of graduation
- 1986 — 40 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- California #G71096
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1639212624. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
597
Distinct HCPCS
9
Medicare allowed
$84,514
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
45380 |
Biopsy of large bowel using a flexible endoscope | 107 | 107 | $169 | |
99212 |
Established patient office or other outpatient visit, 10-19 minutes | 101 | 89 | $66 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 100 | 99 | $103 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 98 | 98 | $132 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 55 | 55 | $280 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 53 | 51 | $98 | |
45378 |
Diagnostic exam of large bowel using a flexible endoscope | 50 | 50 | $204 | |
G0121 |
Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk | 21 | 21 | $203 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 12 | 12 | $120 |
In context: peer comparison
Among 24 peers in San Francisco Gastroenterology Physician, average services per provider: 42. This provider delivers 14× the peer median.Open Payments
Industry payments received
All-time total
$374
Transactions
15
Manufacturers
9
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Intercept Pharmaceuticals, INC. | 4 | $96.93 | |
| Abbvie INC. | 3 | $68.28 | |
| Pfizer INC. | 2 | $47.58 | |
| Medtronic, INC. | 1 | $46.36 | |
| Janssen Biotech, INC. | 1 | $44.56 | |
| Aimmune Therapeutics, INC. | 1 | $23.99 | |
| Ipsen Biopharmaceuticals, INC | 1 | $18.81 | |
| Fresenius Kabi USA, LLC | 1 | $14.16 | |
| Celgene Corporation | 1 | $13.57 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,481
Patients
598
Total drug cost
$259,520
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Omeprazole | Generic | 543 | 144 | $9,483 |
| Famotidine | Generic | 221 | 62 | $5,609 |
| Sod Sulf-Potass Sulf-Mag Sulf (Sodium, Potassium,Mag Sulfates) | Brand | 128 | 128 | $9,492 |
| Cholestyramine (Cholestyramine (With Sugar)) | Brand | 93 | 40 | $7,260 |
| Dicyclomine Hcl | Generic | 93 | 43 | $1,966 |
| Pantoprazole Sodium | Generic | 75 | 19 | $2,228 |
| Gavilyte-C (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 65 | 63 | $1,254 |
| Sucralfate | Generic | 63 | 24 | $1,757 |
| Dexlansoprazole Dr (Dexlansoprazole) | Brand | 45 | 0 | $15,937 |
| Esomeprazole Magnesium | Generic | 42 | 23 | $3,891 |
Frequently asked questions
What is Dr. Robert Elsen's medical specialty?
Dr. Robert Elsen practices Gastroenterology Physician in San Francisco, CA.
Where does Dr. Robert Elsen practice?
Dr. Robert Elsen practices at 45 Castro St Ste 437, San Francisco, CA 941141029. Office phone: 4154690643.
What is Dr. Robert Elsen's NPI?
Dr. Robert Elsen's National Provider Identifier (NPI) is 1639212624, issued by NPPES.
Does Dr. Robert Elsen accept Medicare assignment?
Yes. Dr. Robert Elsen accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Robert Elsen commonly perform?
Top Medicare-reported procedures in 2023: Biopsy of large bowel using a flexible endoscope (HCPCS 45380); Established patient office or other outpatient visit (HCPCS 99212); Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (HCPCS 43239). Source: CMS Medicare Physician & Other Practitioners file.