Internal Medicine, Critical Care Medicine · Monterey Park, CA
NPI
1205821477
Since 2005
Specialty
Internal Medicine, Critical Care Medicine
Code 207RC0200X
Group practices
3
Medicare group memberships
Hospitals
6
Hospital affiliations
500 N Garfield Ave, Suite 204
Monterey Park, CA, 91754
Phone (626) 280-4393
Groups this clinician bills Medicare through
Medicare paid, 2024
$574K
5,406 services
Medicare patients, 2024
1,219
Average age 78
Drug cost, 2024
$2.5M
7,661 prescriptions
Company payments, 2025
$72K
From 13 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Stephen P Chen was code 99233 (hospital e&m - subsequent), 2,530 times for 528 patients. In total Stephen P Chen billed 5,406 services in 45 codes, and Medicare paid $574K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2020-04-20.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| 99233 Hospital E&M - Subsequent | Facility | 2,530 | 528 | $97.10 | $246K |
| 99291 Critical Care E&M | Facility | 916 | 309 | $172.02 | $158K |
| 99215 Office E&M - Established | Office | 356 | 264 | $144.65 | $51K |
| 99443 Telephone Services | Office | 346 | 232 | $100.17 | $35K |
| 99214 Office E&M - Established | Office | 238 | 182 | $100.64 | $24K |
| 99223 Hospital E&M - Initial | Facility | 134 | 128 | $139.40 | $19K |
| 94729 Pulmonary Function Testing | Office | 70 | 68 | $50.37 | $3,526 |
| 94727 Pulmonary Function Testing | Office | 70 | 68 | $38.74 | $2,712 |
| 94060 Pulmonary Function Testing | Office | 70 | 68 | $33.74 | $2,362 |
| G0180 Physician or allowed practitioner 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 and | Office | 69 | 41 | $44.84 | $3,094 |
| 99204 Office E&M - New | Office | 49 | 49 | $126.18 | $6,183 |
| 99292 Critical Care E&M | Facility | 40 | 28 | $87.00 | $3,480 |
| 99205 Office E&M - New | Office | 35 | 35 | $177.90 | $6,226 |
| 96372 Injection Administration | Office | 23 | 12 | $12.02 | $276 |
| 99310 SNF E&M | Facility | 20 | 12 | $128.98 | $2,580 |
By year: 2022 $626K for 5,543 services; 2023 $658K for 5,597 services; 2024 $574K for 5,406 services.
Medicare prescription drug claims, 2024
In 2024, the drug Stephen P Chen prescribed most often to Medicare patients was Montelukast Sodium, with 621 prescriptions and refills. In total Stephen P Chen wrote 7,661 Medicare prescriptions that cost $2.5M.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Montelukast Sodium Generic | 621 | 899 | 134 | $4,107 |
| Trelegy Ellipta Fluticasone/Umeclidin/Vilanter | 563 | 643 | 104 | $395K |
| Albuterol Sulfate Hfa Albuterol Sulfate | 465 | 490 | 116 | $16K |
| Fluticasone Propionate Generic | 388 | 509 | 103 | $4,010 |
| Roflumilast Generic | 339 | 408 | 58 | $42K |
| Anoro Ellipta Umeclidinium Brm/Vilanterol Tr | 258 | 298 | 50 | $134K |
| Levocetirizine Dihydrochloride Generic | 203 | 265 | 48 | $1,620 |
| Breztri Aerosphere Budesonide/Glycopyr/Formoterol | 186 | 206 | 50 | $127K |
| Breo Ellipta Fluticasone/Vilanterol | 174 | 200 | 28 | $78K |
| Lorazepam Generic | 162 | 166 | 28 | $453 |
| Combivent Respimat Ipratropium/Albuterol Sulfate | 150 | 160 | 26 | $75K |
| Ventolin Hfa Albuterol Sulfate | 140 | 148 | 33 | $8,153 |
| Prednisone Generic | 138 | 158 | 67 | $394 |
| Zolpidem Tartrate Generic | 119 | 121 | 30 | $365 |
| Omeprazole Generic | 87 | 132 | 23 | $493 |
Brand drugs: - claims; generic drugs: 4,883 claims; opioid claims: 42.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Stephen P Chen $72K ($72K in general payments such as food, travel and fees) from 13 companies. The largest payer was AstraZeneca Pharmaceuticals LP with $52K.
| Company | Payments | Amount |
|---|---|---|
| AstraZeneca Pharmaceuticals LP AZN | 64 | $52K |
| GlaxoSmithKline, LLC. GSK | 34 | $15K |
| Verona Pharma, Inc. VRNA | 15 | $2,715 |
| Viatris Specialty LLC | 5 | $1,437 |
| Merck Sharp & Dohme LLC MRK | 5 | $318 |
| Abbvie Inc. ABBV | 11 | $222 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | 5 | $128 |
| Actelion Pharmaceuticals US, Inc. JNJ | 3 | $126 |
| Regeneron Healthcare Solutions, Inc. REGN | 2 | $112 |
| Novo Nordisk Inc NVO | 2 | $45.56 |
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.