Internal Medicine, Medical Oncology · Loma Linda, CA
NPI
1073542692
Since 2006
Specialty
Internal Medicine, Medical Oncology
Code 207RX0202X
Group practices
1
Medicare group memberships
Hospitals
1
Hospital affiliations
11370 Anderson St
Loma Linda, CA, 92354
Phone (909) 558-2481
Groups this clinician bills Medicare through
Medicare paid, 2024
$32K
495 services
Medicare patients, 2024
167
Average age 75
Drug cost, 2024
$3.4M
613 prescriptions
Company payments, 2025
$5,387
From 4 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Chien-Shing Chen was code 99214 (office e&m - established), 199 times for 96 patients. In total Chien-Shing Chen billed 495 services in 14 codes, and Medicare paid $32K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2008-07-16.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| 99214 Office E&M - Established | Facility | 199 | 96 | $69.29 | $14K |
| 99213 Office E&M - Established | Facility | 123 | 85 | $41.86 | $5,149 |
| 99213 Office E&M - Established | Office | 53 | 45 | $71.85 | $3,808 |
| 99214 Office E&M - Established | Office | 48 | 31 | $99.12 | $4,758 |
| 99231 Hospital E&M - Subsequent | Facility | 21 | 17 | $39.28 | $825 |
| 99204 Office E&M - New | Facility | 17 | 17 | $106.25 | $1,806 |
By year: 2022 $29K for 601 services; 2023 $20K for 405 services; 2024 $32K for 495 services.
Medicare prescription drug claims, 2024
In 2024, the drug Chien-Shing Chen prescribed most often to Medicare patients was Xtandi (Enzalutamide), with 82 prescriptions and refills. In total Chien-Shing Chen wrote 613 Medicare prescriptions that cost $3.4M.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Xtandi Enzalutamide | 82 | 92 | Under 11 | $1.1M |
| Prednisone Generic | 57 | 58 | 11 | $142 |
| Abiraterone Acetate Generic | 45 | 45 | Under 11 | $5,875 |
| Erleada Apalutamide | 36 | 37 | Under 11 | $520K |
| Acyclovir Generic | 32 | 33 | Under 11 | $375 |
| Ondansetron Hcl Generic | 31 | 31 | 15 | $1,127 |
| Dexamethasone Generic | 28 | 28 | Under 11 | $304 |
| Famotidine Generic | 27 | 31 | Under 11 | $184 |
| Hydroxyurea Generic | 26 | 43 | Under 11 | $407 |
| Cabometyx Cabozantinib S-Malate | 24 | 24 | Under 11 | $421K |
| Orgovyx Relugolix | 23 | 23 | Under 11 | $62K |
| Lenalidomide Generic | 15 | 15 | Under 11 | $150K |
| Sutent Sunitinib Malate | 12 | 12 | Under 11 | $258K |
| Calquence Acalabrutinib Maleate | 11 | 11 | Under 11 | $159K |
| Everolimus Generic | 11 | 11 | Under 11 | $16K |
Brand drugs: 236 claims; generic drugs: 377 claims.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Chien-Shing Chen $5,387 ($5,387 in general payments such as food, travel and fees) from 4 companies. The largest payer was Avyxa Pharma, LLC with $4,496.
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.