Joe Wisniewski works on healthcare price transparency and provider identity. He got his start at Turquoise Health in 2021, when barely 1 in 4 hospitals had posted rates. He is building Luhn Health, a record that ties a provider's NPIs, CCN and tax IDs together and follows the owners up the chain, and supports rural hospitals with price transparency compliance and underpayments work. He writes and speaks about what published rates and ownership filings show, and what they hide.