Not tipping the doctor, but the hospital:

"Many hospitals conduct nightly wealth screenings — using software that culls public data such as property records, contributions to political campaigns and other charities — to gauge which patients are most likely to be the source of large donations.

"Those who seem promising targets for fund-raising may receive a visit from a hospital executive in their rooms, as well as extra amenities like a bathrobe or a nicer waiting area for their families."

https://www.nytimes.com/2019/01/24/business/hospitals-asking...