Stephen P. Chen, MD
NPI 1205821477ActiveIndividual· Internal Medicine, Critical Care Medicine· Monterey Park, CA
Internal Medicine, Critical Care Medicine (MD) in Monterey Park, California, trained at Harvard Medical School (class of 1998). Their prescriptions cost Medicare Part D more than their services did: $2,531,612 for 7,661 claims, against $574,376 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 13 companies reporting payments in 2025, $72,216 in all, mostly speaking and faculty fees.
Overview
| NPI | 1205821477 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Sep 14, 2005 |
| Last updated in NPPES | Apr 20, 2020 |
| Certified by provider | Apr 20, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Critical Care Medicine Primary | 207RC0200X | A71696 | CA |
| Internal Medicine | 207R00000X | A71696 | CA |
| Internal Medicine, Pulmonary Disease | 207RP1001X | A71696 | CA |
| Internal Medicine, Sleep Medicine | 207RS0012X | A71696 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Critical Care (Intensivists) (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,219 |
|---|---|
| Services billed | 5,406 across 45 procedure codes |
| Paid by Medicare | $574,376 |
Part D prescriptions in 2024
| Prescriptions (claims) | 7,661 · 9,395 30-day fills |
|---|---|
| Patients | 534 |
| Total drug cost | $2,531,612 |
| Generic share | 64% of claims |
Education and affiliations
| Medical school | Harvard Medical School |
|---|---|
| Graduation year | 1998 |
| Medicare specialty | Critical Care (Intensivists) |
| Secondary specialties | Internal Medicine, Pulmonary Disease, Sleep Medicine |
| Telehealth | Offers telehealth |
Medical group
- Prestige Pulmonary Consultants IncMonterey Park, CA · 11 clinicians
Hospital affiliations
- Adventist Health White MemorialLos Angeles, CA
- Alhambra Hospital Medical CenterAlhambra, CA
- Garfield Medical CenterMonterey Park, CA
- San Gabriel Valley Medical CenterSan Gabriel, CA
- Usc Arcadia HospitalArcadia, CA
Other facilities
- Family Home Health Agency, LLCHome health agency · Glendora, CA
- Happy Home Health ServicesHome health agency · Arcadia, CA
- Kindred Hospital Baldwin ParkLong-term care hospital · Baldwin Park, CA
Industry payments (Open Payments)
- 2025$72,216 · 153 payments from 13 companies
- 2024$59,271 · 135 payments from 19 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $52,331 | 64 |
| Glaxosmithkline, LLC. | $14,709 | 34 |
| Verona Pharma, Inc. | $2,715 | 15 |
| Viatris Specialty LLC | $1,437 | 5 |
| Merck Sharp & Dohme LLC | $318.46 | 5 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$63,093 · 29 payments
- Food and Beverage$4,833 · 102 payments
- Honoraria$2,000 · 1 payment
- Travel and Lodging$1,334 · 18 payments
- Education$491.10 · 2 payments
- Consulting Fee$465.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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