Why catalog breadth is partner-dependent, not fixed
On any multi-pharmacy platform, the catalog is a reflection of the pharmacies behind it. A medication appears only if one of your assigned 503A partners compounds it and can ship to the patient's state. That makes a single advertised catalog size misleading: what matters is whether your specific protocols — the exact molecule, strength, and vial size — are available to your patients.
Evaluate the catalog against your real order mix. List your top ten SKUs and confirm each is available, in the strengths you prescribe, to the states you serve, before you commit. Refill's public site will not answer that; a demo with your formulary in hand will.