68,643 US pharmacies enriched with chain attribution, PSAO affiliation, and geocoordinates. Filter by national chains or independent PSAO members — and explore which networks dominate each market.
Loading pharmacy network…
Full dataset: 68,643 pharmacies with chain attribution, PSAO membership, geocoordinates, plan participation, and preferred-rate flags.
Largest US retail pharmacy chain — 9,500+ locations
Second-largest US chain — 8,700+ locations
Regional chain concentrated in Northeast & West
Mass-merchandise in-store pharmacies — 4,600+ locations
Grocery-embedded pharmacies in Midwest & South
McKesson PSAO — 10,800+ independent members
Cardinal Health PSAO — 5,900+ member pharmacies
Elevate Provider Network PSAO — 4,500+ members
AlignRx PSAO — independent pharmacy network
The TwinFyRx pharmacy directory covers 68,643 active US pharmacies sourced from NPPES and CMS plan participation data. Chain attribution (28,945 pharmacies / 42%) uses name normalization and brand override rules. PSAO membership (21,396 / 31%) is inferred from CMS network participation patterns. 99.8% of pharmacies are geocoded, 89.6% to street-level precision via Census Bureau batch geocoder.