Internal Medicine, Geriatric Medicine · San Gabriel, CA
NPI
1679675904
Since 2006
Specialty
Internal Medicine, Geriatric Medicine
Code 207RG0300X
Group practices
0
Medicare group memberships
Hospitals
3
Hospital affiliations
1448 S. San Gabriel Bl.
San Gabriel, CA, 91776
Phone (626) 569-2888
Medicare paid, 2024
$388K
5,279 services
Medicare patients, 2024
681
Average age 79
Drug cost, 2024
$7.4M
43,068 prescriptions
Company payments, 2025
$14K
From 29 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Oscar L Chien was code 99214 (office e&m - established), 2,140 times for 490 patients. In total Oscar L Chien billed 5,279 services in 20 codes, and Medicare paid $388K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2020-04-02.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| 99214 Office E&M - Established | Office | 2,140 | 490 | $61.61 | $132K |
| 99232 Hospital E&M - Subsequent | Facility | 1,199 | 119 | $58.87 | $71K |
| 99310 SNF E&M | Office | 727 | 106 | $111.02 | $81K |
| 99223 Hospital E&M - Initial | Facility | 155 | 113 | $129.53 | $20K |
| 99239 Hospital Discharge Management | Facility | 140 | 102 | $86.54 | $12K |
| G0179 Physician or allowed practitioner re-certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians a | Office | 134 | 64 | $32.92 | $4,412 |
| 99309 SNF E&M | Office | 131 | 46 | $80.55 | $11K |
| 99349 Home E&M - New and Established | Office | 131 | 17 | $92.72 | $12K |
| 99306 SNF E&M | Office | 130 | 96 | $137.51 | $18K |
| 99213 Office E&M - Established | Office | 113 | 66 | $49.47 | $5,590 |
| 99310 SNF E&M | Facility | 57 | 14 | $112.15 | $6,392 |
| G0181 Physician or allowed practitioner supervision of a patient receiving medicare-covered services provided by a participating home health agency (patient not present) requiring complex and multidisciplinary care modalities involving regular physician or allow | Office | 52 | 44 | $77.94 | $4,053 |
| G0008 Administration of influenza virus vaccine | Office | 38 | 37 | $9.80 | $372 |
| 90658 Vaccine Product | Office | 37 | 37 | $21.42 | $793 |
| 99205 Office E&M - New | Office | 26 | 26 | $150.51 | $3,913 |
By year: 2022 $375K for 5,609 services; 2023 $445K for 6,313 services; 2024 $388K for 5,279 services.
Medicare prescription drug claims, 2024
In 2024, the drug Oscar L Chien prescribed most often to Medicare patients was Atorvastatin Calcium, with 1,782 prescriptions and refills. In total Oscar L Chien wrote 43,068 Medicare prescriptions that cost $7.4M.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Atorvastatin Calcium Generic | 1,782 | 2,727 | 310 | $11K |
| Losartan Potassium Generic | 1,463 | 2,460 | 260 | $8,921 |
| Amlodipine Besylate Generic | 1,333 | 2,094 | 233 | $5,386 |
| Pantoprazole Sodium Generic | 1,040 | 1,395 | 191 | $11K |
| Jardiance Empagliflozin | 875 | 1,106 | 137 | $596K |
| Metoprolol Succinate Generic | 857 | 1,441 | 153 | $7,901 |
| Vascepa Icosapent Ethyl | 847 | 1,011 | 114 | $332K |
| Ezetimibe Generic | 802 | 1,055 | 127 | $8,842 |
| Gabapentin Generic | 763 | 859 | 144 | $4,245 |
| Hydralazine Hcl Generic | 754 | 1,086 | 123 | $6,146 |
| Farxiga Dapagliflozin Propanediol | 693 | 802 | 118 | $435K |
| Montelukast Sodium Generic | 690 | 905 | 126 | $4,202 |
| Famotidine Generic | 678 | 899 | 132 | $5,677 |
| Tamsulosin Hcl Generic | 670 | 1,049 | 132 | $6,984 |
| Kerendia Finerenone | 639 | 757 | 83 | $474K |
Brand drugs: 9,777 claims; generic drugs: 33,069 claims; opioid claims: 117.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Oscar L Chien $14K ($14K in general payments such as food, travel and fees) from 29 companies. The largest payer was Sumitomo Pharma America, Inc. with $5,016.
| Company | Payments | Amount |
|---|---|---|
| Sumitomo Pharma America, Inc. 4506.T | 12 | $5,016 |
| Abbvie Inc. ABBV | 12 | $2,449 |
| Vivus LLC | 5 | $1,440 |
| Phathom Pharmaceuticals, Inc. PHAT | 5 | $1,328 |
| AstraZeneca Pharmaceuticals LP AZN | 17 | $648 |
| Bayer Healthcare Pharmaceuticals Inc. BAYN.DE | 12 | $350 |
| Teva Pharmaceuticals USA, Inc. TEVA | 5 | $303 |
| Novo Nordisk Inc NVO | 5 | $296 |
| Amgen Inc. AMGN | 13 | $227 |
| Otsuka America Pharmaceutical, Inc. 4578.T | 6 | $224 |
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.