Stefan Sien, D.O.
NPI 1932319464ActiveIndividual· Internal Medicine, Pulmonary Disease· Murrieta, CA
Internal Medicine, Pulmonary Disease (D.O.) with Inspire Pulmonary and Sleep Medicine Specialist, practicing in Murrieta, California. Their prescriptions cost Medicare Part D more than their services did: $2,442,149 for 3,565 claims, against $128,891 paid for services in 2024. Intuitive Surgical, Inc. was the largest of 20 companies reporting payments in 2025, $2,306 in all, mostly food and beverage. Lists Loma Linda University Medical Center-Murrieta and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1932319464 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | Yes |
| NPI issued | May 23, 2007 |
| Last updated in NPPES | Jun 9, 2021 |
| Certified by provider | May 25, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Pulmonary Disease Primary | 207RP1001X | 20A12378 | CA |
| Internal Medicine, Critical Care Medicine | 207RC0200X | 20A12378 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Pulmonary Disease (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 443 |
|---|---|
| Services billed | 1,483 across 34 procedure codes |
| Paid by Medicare | $128,891 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,565 · 4,715 30-day fills |
|---|---|
| Patients | 528 |
| Total drug cost | $2,442,149 |
Education and affiliations
| Graduation year | 2005 |
|---|---|
| Medicare specialty | Pulmonary Disease |
| Secondary specialties | Critical Care (Intensivists), Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Inspire Pulmonary and Sleep Medicine SpecialistTemecula, CA · 4 clinicians
Hospital affiliations
- Loma Linda University Medical Center-MurrietaMurrieta, CA
- Menifee Global Medical CenterSun City, CA
- Southwest Healthcare Rancho Springs HospitalMurrieta, CA
- Temecula Valley HospitalTemecula, CA
Industry payments (Open Payments)
- 2025$2,306 · 84 payments from 20 companies
- 2024$5,141 · 147 payments from 23 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Intuitive Surgical, Inc. | $666.62 | 3 |
| Astrazeneca Pharmaceuticals LP | $240.48 | 17 |
| Glaxosmithkline, LLC. | $238.33 | 14 |
| Merck Sharp & Dohme LLC | $173.38 | 7 |
| Grifols USA, LLC | $136.56 | 6 |
What the 2025 payments were for
- Food and Beverage$2,295 · 83 payments
- Education$10.85 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other pulmonologists in Murrieta
- 1891890901