I don't know if folks are aware of this resource, but Wild Ginger Patterns offers free customizable sewing patterns for medical clothing. The link is here:
Scroll down to "Free iCare Medical Patterns," about halfway down the page.
There are patterns for nightshirts/gowns, shrugs, wrap pants, bibs, diapers, etc. The sewing skills needed are VERY basic and the fit is quite relaxed.