Millicent Leigh Horn, MD
NPI 1427673821ActiveIndividual· General Practice· Saint Louis, MO
General Practice (MD) in Saint Louis, Missouri, licensed in MO, with an NPI issued in June 2020. Their prescriptions cost Medicare Part D more than their services did: $10,274 for 97 claims, against $6,696 paid for services in 2024.
Overview
| NPI | 1427673821 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 11, 2020 |
| Last updated in NPPES | Sep 24, 2025 |
| Certified by provider | Sep 24, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| General Practice Primary | 208D00000X | 2022032316 | MO |
| Internal Medicine | 207R00000X | 2022032316 | MO |
| Hospitalist | 208M00000X | 2022032316 | 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 - Internal Medicine (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 79 |
|---|---|
| Services billed | 104 across 12 procedure codes |
| Paid by Medicare | $6,696 |
Part D prescriptions in 2024
| Prescriptions (claims) | 97 · 186 30-day fills |
|---|---|
| Patients | 32 |
| Total drug cost | $10,274 |
| Generic share | 82% of claims |
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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