Michael B. Chen, M.D.
NPI 1023056355ActiveIndividual· Obstetrics & Gynecology· Saint Louis, MO
Obstetrics & Gynecology (M.D.) with Obhg Illinois SC, practicing in Saint Louis, Missouri. Their prescriptions cost Medicare Part D more than their services did: $2,915 for 143 claims, against $1,168 paid for services in 2024. Bayer Healthcare Pharmaceuticals Inc. reported $43.76 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1023056355 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 2, 2006 |
| Last updated in NPPES | Apr 15, 2026 |
| Certified by provider | Apr 15, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Obstetrics & Gynecology Primary | 207V00000X | 108742 | MO |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Obstetrics/Gynecology (IL); Practitioner - Obstetrics/Gynecology (MO); Practitioner - Obstetrics/Gynecology (UT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 11 |
|---|---|
| Services billed | 15 across 6 procedure codes |
| Paid by Medicare | $1,168 |
Part D prescriptions in 2024
| Prescriptions (claims) | 143 · 339 30-day fills |
|---|---|
| Patients | 65 |
| Total drug cost | $2,915 |
| Generic share | 98% of claims |
Education and affiliations
| Graduation year | 1995 |
|---|---|
| Medicare specialty | Obstetrics/Gynecology |
Medical group
- Obhg Illinois SCCarbondale, IL · 25 clinicians
Industry payments (Open Payments)
- 2025$43.76 · 2 payments from 1 company
- 2024$21.34 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Bayer Healthcare Pharmaceuticals Inc. | $43.76 | 2 |
What the 2025 payments were for
- Food and Beverage$43.76 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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