ER cost data methodology
ERcost.com treats each ER pricing field as a separate data basis. It does not blend gross charges, cash prices, Medicare rates, ratios, commercial insurance values, and patient-paid bills into one estimate.
Current cost source
ERcost.com syncs website-ready records from the existing Supabase source of truth for hospital ER pricing data. City pages read synced app-database rows so public rendering does not depend on live cross-project joins.
Displayed price bases
- Gross standard charge.
- Cash or self-pay price.
- Medicare rate.
- Medicare-to-gross ratio.
Insurance labels
ERcost.com does not label a value as commercial negotiated, allowed amount, insured patient responsibility, or patient-paid bill unless the source explicitly provides that field.
Versioning and confidence
Cost rows preserve source pricing ID, dataset version, standard-charge version, source update timestamp, sync timestamp, and confidence score so displayed numbers can be traced back to their source metadata.
Confidence labels are evidence labels. They do not mean a displayed amount is a guaranteed final bill, and they do not include clinician billing, insurance plan design, deductibles, coinsurance, tests, imaging, transport, medication, or diagnosis changes.