Kathleen Nolan Davis, PA
NPI 1881289262ActiveIndividual· Physician Assistant· Saint Louis, MO
Physician Assistant (PA) with Mercy Clinic Gastroenterology LLC, practicing in Saint Louis, Missouri. Their prescriptions cost Medicare Part D more than their services did: $15,797 for 168 claims, against $9,371 paid for services in 2024. Genzyme Corporation was the largest of 6 companies reporting payments in 2025, $261.67 in all, mostly food and beverage. Lists Mercy Hospital St Louis as a hospital affiliation.
Overview
| NPI | 1881289262 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA |
| Sole proprietor | No |
| NPI issued | Mar 8, 2021 |
| Last updated in NPPES | Dec 2, 2022 |
| Certified by provider | Dec 2, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | 2021023487 | 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 - Physician Assistant (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 121 |
|---|---|
| Services billed | 147 across 9 procedure codes |
| Paid by Medicare | $9,371 |
Part D prescriptions in 2024
| Prescriptions (claims) | 168 · 278 30-day fills |
|---|---|
| Patients | 64 |
| Total drug cost | $15,797 |
| Generic share | 83% of claims |
Education and affiliations
| Graduation year | 2021 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical group
- Mercy Clinic Gastroenterology LLCWashington, MO · 67 clinicians
Hospital affiliation
- Mercy Hospital St LouisSaint Louis, MO
Industry payments (Open Payments)
- 2025$261.67 · 9 payments from 6 companies
- 2024$55.11 · 2 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genzyme Corporation | $135.85 | 2 |
| Abbvie Inc. | $54.10 | 3 |
| Regeneron Healthcare Solutions, Inc. | $21.92 | 1 |
| Phathom Pharmaceuticals, Inc. | $18.94 | 1 |
| Lilly USA, LLC | $17.27 | 1 |
What the 2025 payments were for
- Food and Beverage$261.67 · 9 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 512 physician assistants in Saint Louis · All physician assistants in Missouri