28 CFR §549.70

1. (a)The Bureau of Prisons (Bureau) may, under certain circumstances, charge you, an inmate under our care and custody, a fee for providing you with health care services.
2. (b)Generally, if you are an inmate as described in § 549.71, you must pay a fee for health care services of $2.00 per health care visit if you:
   1. (1)Receive health care services in connection with a health care visit that you requested, (except for services described in § 549.72); or
   2. (2)Are found responsible through the Disciplinary Hearing Process to have injured an inmate who, as a result of the injury, requires a health care visit.