| Meridian Illinois Medicaid Clinical | Pegcetacoplan (Empaveli, Syfovre) | 2025-08-01 |
| Meridian Illinois Medicaid Clinical | Peginterferon Alfa-2a (Pegasys) | 2025-08-01 |
| Meridian Illinois Medicaid Clinical | Pembrolizumab, Pembrolizumab/Berahyaluronidase Alfa- | 2025-08-01 |
| Meridian Illinois Medicaid Clinical | Pemigatinib (Pemazyre) | 2025-08-01 |
| Meridian Illinois Medicaid Clinical | Pertuzumab/Trastuzumab/Hyaluronidase-zzxf (Phesgo) | 2025-08-01 |
| Meridian Illinois Medicaid Clinical | Pimavanserin (Nuplazid) | 2025-08-01 |
| Meridian Illinois Medicaid Clinical | Pirfenidone (Esbriet) | 2025-08-01 |
| Meridian Illinois Medicaid Clinical | Plerixafor (Mozobil) | 2025-08-01 |
| Meridian Illinois Medicaid Clinical | Polatuzumab Vedotin-piiq (Polivy) | 2025-08-01 |
| Meridian Illinois Medicaid Clinical | Pyrimethamine (Daraprim) | 2025-08-01 |