Geraldine A. Ryan, M.D.
NPI 1689640609ActiveIndividual· Internal Medicine· O Fallon, MO
Internal Medicine (M.D.) in O Fallon, Missouri, trained at Saint Louis University School of Medicine (class of 1988). Their prescriptions cost Medicare Part D more than their services did: $608,826 for 6,874 claims, against $51,064 paid for services in 2024. Abbvie Inc. was the largest of 15 companies reporting payments in 2025, $585.57 in all, mostly food and beverage.
Overview
| NPI | 1689640609 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Feb 28, 2006 |
| Last updated in NPPES | Apr 2, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 100756 | MO |
| Pediatrics | 208000000X | 100756 | MO |
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 - Family Practice (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 191 |
|---|---|
| Services billed | 607 across 31 procedure codes |
| Paid by Medicare | $51,064 |
Part D prescriptions in 2024
| Prescriptions (claims) | 6,874 · 17,690 30-day fills |
|---|---|
| Patients | 544 |
| Total drug cost | $608,826 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | Saint Louis University School of Medicine |
|---|---|
| Graduation year | 1988 |
| Medicare specialty | Family Practice |
| Telehealth | Offers telehealth |
Medical groups
- Mercy Clinic East CommunitiesSaint Louis, MO · 571 clinicians
- Aging Well Health Care, LLCSaint Louis, MO · 238 clinicians
Hospital affiliations
- Mercy Hospital LincolnTroy, MO
- Mercy Hospital St LouisSaint Louis, MO
- Mercy Hospital WashingtonWashington, MO
- Ssm St Joseph Health CenterSaint Charles, MO
- St Lukes HospitalChesterfield, MO
Other facilities
- Mercy Home HealthHome health agency · Saint Louis, MO
Industry payments (Open Payments)
- 2025$585.57 · 30 payments from 15 companies
- 2024$511.68 · 23 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $143.45 | 6 |
| Lilly USA, LLC | $61.65 | 3 |
| Amgen Inc. | $54.60 | 3 |
| Novo Nordisk Inc | $50.12 | 3 |
| Axsome Therapeutics, Inc. | $48.02 | 2 |
What the 2025 payments were for
- Food and Beverage$585.57 · 30 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 25 internal medicine physicians in O Fallon · All internal medicine physicians in Missouri