This text is entitled Liber medicinae secundum Petrum de Musandia ('Second book of medicine of Peter Musandinus'). Petrus Musandinus was a 12th-century physician from the school of Salerno. Musandinus was probably the student of another important Salernitian physician and writer, Bartholomeus of Salerno who produced a commentary on the collection of Hippocratic medical texts fundamental to medieval medicine: the Articella. Petrus Musandinus himself produced a work, seemingly based on the lectures of his teacher at Salerno, Bartholomeus. Petrus also inspired the next generation of Salernitian medical scholars and commentators, as his student Maurus produced another Salernitian commentary on the Articella in the next generation.

The text contained in MS 164 is attributed to Petrus Musandinus, and claims to be his second book of medicine. Musandinus' most known work is the 'summa de preparatione ciborum et potuum,' yet this text does not match with that work.

The text begins on f. 1r with the words Liber medicinae secundum magistrum Petrum de Musandia. Circa omnium egritudinum genera triplex curacionum modus occurrum. This incipit (first line of text) is reported in Lynn Thorndike and Pearl Kibre's catalogue of Latin medieval scientific incipits. Along with MS 164, they note three other manuscripts that contain a text with at least this same title and incipit.

The text of MS 164 ends on f. 58v, with the words tertiane de colera atro.

Well written, with plain red capitals, one decorative initial at the beginning in red touched with blue.