Internal Medicine, Gastroenterology · San Bernardino, CA
NPI
1245215144
Since 2005
Specialty
Internal Medicine, Gastroenterology
Code 207RG0100X
Group practices
1
Medicare group memberships
Hospitals
2
Hospital affiliations
424 E Vanderbilt Way Ste B
San Bernardino, CA, 92408
Phone (909) 796-0363
Groups this clinician bills Medicare through
Medicare paid, 2024
$77K
644 services
Medicare patients, 2024
374
Average age 71
Drug cost, 2024
$387K
2,399 prescriptions
Company payments, 2025
$895
From 10 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Won-Seok Jo was code 43239 (upper gi endoscopy), 113 times for 107 patients. In total Won-Seok Jo billed 644 services in 24 codes, and Medicare paid $77K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2023-10-17.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| 43239 Upper GI Endoscopy | Facility | 113 | 107 | $95.00 | $11K |
| 45385 Colonoscopy - Lesion Removal | Facility | 104 | 104 | $196.13 | $20K |
| 99204 Office E&M - New | Office | 88 | 88 | $133.08 | $12K |
| 99214 Office E&M - Established | Office | 68 | 51 | $98.30 | $6,685 |
| 45378 Lower GI Endoscopy - Other | Facility | 58 | 58 | $133.15 | $7,723 |
| 99203 Office E&M - New | Office | 47 | 47 | $77.69 | $3,652 |
| G0105 Colorectal cancer screening; colonoscopy on individual at high risk | Facility | 45 | 45 | $181.97 | $8,189 |
| 43450 Digestive/Gastrointestinal | Facility | 42 | 42 | $31.21 | $1,311 |
| 99213 Office E&M - Established | Office | 39 | 33 | $61.42 | $2,395 |
| 45380 Lower GI Endoscopy - Other | Facility | 18 | 18 | $84.85 | $1,527 |
By year: 2022 $58K for 468 services; 2023 $53K for 453 services; 2024 $77K for 644 services.
Medicare prescription drug claims, 2024
In 2024, the drug Won-Seok Jo prescribed most often to Medicare patients was Gavilyte-G (Peg3350/Sod Sulf,bicarb,cl/Kcl), with 507 prescriptions and refills. In total Won-Seok Jo wrote 2,399 Medicare prescriptions that cost $387K.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Gavilyte-G Peg3350/Sod Sulf,bicarb,cl/Kcl | 507 | 507 | 470 | $8,361 |
| Peg-3350 And Electrolytes Peg3350/Sod Sulf,bicarb,cl/Kcl | 295 | 295 | 273 | $4,938 |
| Omeprazole Generic | 287 | 426 | 87 | $2,108 |
| Famotidine Generic | 274 | 450 | 83 | $3,715 |
| Linzess Linaclotide | 108 | 116 | 27 | $62K |
| Sucralfate Generic | 84 | 103 | 36 | $2,245 |
| Pantoprazole Sodium Generic | 72 | 135 | 21 | $845 |
| Dicyclomine Hcl Generic | 71 | 87 | 27 | $1,348 |
| Lactulose Generic | 51 | 63 | 11 | $1,558 |
| Cholestyramine Cholestyramine (With Sugar) | 39 | 51 | 16 | $2,495 |
| Ondansetron Hcl Generic | 37 | 37 | 13 | $1,171 |
| Gavilyte-C Peg3350/Sod Sulf,bicarb,cl/Kcl | 35 | 35 | 35 | $635 |
| Sod Sulf-Potass Sulf-Mag Sulf Sodium, Potassium,mag Sulfates | 32 | 32 | 32 | $1,958 |
| Metronidazole Generic | 31 | 31 | 31 | $275 |
| Movantik Naloxegol Oxalate | 31 | 31 | Under 11 | $12K |
Brand drugs: 580 claims; generic drugs: 1,819 claims.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Won-Seok Jo $895 ($895 in general payments such as food, travel and fees) from 10 companies. The largest payer was Janssen Biotech, Inc. with $182.
| Company | Payments | Amount |
|---|---|---|
| Janssen Biotech, Inc. JNJ | 14 | $182 |
| Madrigal Pharmaceuticals MDGL | 10 | $179 |
| Ardelyx, Inc. ARDX | 9 | $171 |
| Pfizer Inc. PFE | 4 | $88.03 |
| Phathom Pharmaceuticals, Inc. PHAT | 4 | $80.83 |
| Regeneron Healthcare Solutions, Inc. REGN | 3 | $75.46 |
| Abbvie Inc. ABBV | 3 | $58.5 |
| Alnylam Pharmaceuticals Inc. ALNY | 1 | $20.65 |
| Gilead Sciences, Inc. GILD | 1 | $20.08 |
| Intercept Pharmaceuticals, Inc. | 1 | $19.82 |
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.