The Denobulan medical ship was a type of warp-capable shuttle used by the Denobulans to transport medical supplies.
The Barzai was a Denobulan medical ship that was in service in 2154. (ENT: "Cold Station 12")
Despite being called a "Denobulan medical ship" in dialogue, this type of craft was additionally referred to as a "Denobulan medical shuttle" in the final draft script of "Cold Station 12".
The Denobulan medical ship was designed by John Eaves.