A geographic look at Medicare patient origin across every hospital in a state
Every year, CMS publishes where each hospital's Medicare patients actually live — down to the ZIP code. This explorer maps that patient origin data across all hospitals in a state, so you can see service areas, geographic reach, and how patient flow has shifted over time.
🗺
Market Reach
See exactly which counties and states each hospital draws patients from — and how far that reach extends beyond state lines.
⚔️
Competition
Toggle individual hospitals on and off to isolate service areas and identify where multiple hospitals compete for the same patient population.
📈
Trend
Data spans 2016–2024. Use the year selector to track how a hospital's geographic footprint has grown, shrunk, or shifted over the past decade.
Suppressed Counties
Light blue counties had patients — but CMS withheld the count to protect patient privacy (fewer than 11 cases). They're still on the map because presence matters, even when the number isn't shown.
Hospital Patient Origin · Medicare FFS Inpatient
Where Do Patients Come From?
Patient origin mapped to county for all Medicare fee-for-service inpatient discharges.
State
—
Medicare Patients
—
Hospitals Reporting
—
ZIP Codes Served
—
States Reached
Analyzing a new market?
Get a full patient origin breakdown for any state or region.
Methodology: Patient origin is reported by CMS at the ZIP code level and aggregated to county using the Census ZIP-to-county crosswalk (largest area overlap). Covers Medicare fee-for-service inpatient discharges only — Medicaid, commercial, and Medicare Advantage volume are not reflected. Counties with fewer than 11 patients are suppressed by CMS and shown in light blue.