Internal Medicine, Gastroenterology · San Francisco, CA
NPI
1699017707
Since 2013
Specialty
Internal Medicine, Gastroenterology
Code 207RG0100X
Group practices
3
Medicare group memberships
Hospitals
3
Hospital affiliations
2100 Webster St Ste 115
San Francisco, CA, 94115
Phone (415) 387-8800
Groups this clinician bills Medicare through
Medicare paid, 2024
$120K
1,209 services
Medicare patients, 2024
511
Average age 75
Drug cost, 2024
$356K
993 prescriptions
Company payments, 2025
$2,605
From 17 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Timothy Chen was code 99232 (hospital e&m - subsequent), 299 times for 125 patients. In total Timothy Chen billed 1,209 services in 26 codes, and Medicare paid $120K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2022-02-14.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| 99232 Hospital E&M - Subsequent | Facility | 299 | 125 | $65.64 | $20K |
| 99223 Hospital E&M - Initial | Facility | 188 | 174 | $144.21 | $27K |
| 99213 Office E&M - Established | Office | 152 | 116 | $76.70 | $12K |
| 45380 Lower GI Endoscopy - Other | Facility | 139 | 138 | $87.06 | $12K |
| 43239 Upper GI Endoscopy | Facility | 128 | 123 | $82.10 | $11K |
| 99203 Office E&M - New | Office | 97 | 97 | $93.28 | $9,048 |
| 45385 Colonoscopy - Lesion Removal | Facility | 92 | 92 | $164.88 | $15K |
| 45378 Lower GI Endoscopy - Other | Facility | 23 | 23 | $146.48 | $3,369 |
| 43235 Upper GI Endoscopy | Facility | 15 | 13 | $103.25 | $1,549 |
| 43255 Upper GI Endoscopy | Facility | 15 | 13 | $166.25 | $2,494 |
By year: 2022 $148K for 1,419 services; 2023 $140K for 1,328 services; 2024 $120K for 1,209 services.
Medicare prescription drug claims, 2024
In 2024, the drug Timothy Chen prescribed most often to Medicare patients was Pantoprazole Sodium, with 279 prescriptions and refills. In total Timothy Chen wrote 993 Medicare prescriptions that cost $356K.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Pantoprazole Sodium Generic | 279 | 695 | 152 | $4,974 |
| Gavilyte-C Peg3350/Sod Sulf,bicarb,cl/Kcl | 174 | 174 | 173 | $2,513 |
| Sod Sulf-Potass Sulf-Mag Sulf Sodium, Potassium,mag Sulfates | 121 | 121 | 121 | $7,727 |
| Famotidine Generic | 67 | 169 | 40 | $1,024 |
| Omeprazole Generic | 37 | 72 | 12 | $212 |
| Metronidazole Generic | 24 | 24 | 21 | $152 |
| Gavilyte-G Peg3350/Sod Sulf,bicarb,cl/Kcl | 22 | 22 | 22 | $300 |
| Vemlidy Tenofovir Alafenamide | 20 | 38 | Under 11 | $55K |
| Tetracycline Hcl Generic | 19 | 19 | 16 | $4,171 |
| Sucralfate Generic | 19 | 25 | Under 11 | $3,526 |
| Creon Lipase/Protease/Amylase | 17 | 23 | Under 11 | $40K |
| Dicyclomine Hcl Generic | 15 | 31 | Under 11 | $842 |
| Mesalamine Generic | 15 | 37 | Under 11 | $10K |
| Mesalamine Er Mesalamine | 14 | 22 | Under 11 | $3,922 |
| Entecavir Generic | 13 | 29 | Under 11 | $1,909 |
Brand drugs: 191 claims; generic drugs: 802 claims.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Timothy Chen $2,605 ($2,605 in general payments such as food, travel and fees) from 17 companies. The largest payer was Abbvie Inc. with $687.
| Company | Payments | Amount |
|---|---|---|
| Abbvie Inc. ABBV | 33 | $687 |
| Janssen Biotech, Inc. JNJ | 16 | $427 |
| Aimmune Therapeutics, Inc. | 10 | $275 |
| Lilly USA, LLC LLY | 7 | $225 |
| Takeda Pharmaceuticals U.S.A., Inc. TAK | 15 | $195 |
| Pfizer Inc. PFE | 5 | $110 |
| Regeneron Healthcare Solutions, Inc. REGN | 3 | $108 |
| Phathom Pharmaceuticals, Inc. PHAT | 6 | $98.15 |
| Celltrion USA Inc. 068270.KS | 4 | $93.59 |
| Braintree Laboratories, Inc. | 3 | $77.11 |
Official US government data on Original Medicare services, Medicare prescription drug plans and the payments drug and device companies must report. Services with fewer than 11 patients and drugs with fewer than 11 claims are not published. Procedure codes are shown by number with their public category.