The Wiemer Medical Facility is a hospital found on two different planets, Melina II and Nel III.
Patient Rob Legato was treated in the Wiemer Medical Facility on Melina II by Doctor David Takemura and diagnosed with Iresine Syndrome on stardate 44034.3.
Patient Wendy Neuss, of the Epsilon Municipality was treated in another Wiemer Medical Facility, on Nel III on stardate 45221.4. She suffered from an unknown disease. (TNG: "Violations")
The facility was named after the episodes director, Robert Wiemer.