First printed edition of da Foligno's treatise on bathing together with the first printing with a definite date of Castelli's work. ISTC No. ig00133000. Remarkably the ISTC cites two different separate undated printings of Bonaventura de Castello's work on the baths of Porretta both published about 1473. This dated edition also included a text by Francesco da Siena on the baths of Petrioli. These were among the earliest printings of texts concerning bathing, and very early printings on any medical subject. They probably served commercial purposes in advertising the baths as well as providing therapeutic advice.
Digital facsimile from Bayerische StaatsBibliothek at this link.

Considering the central importance of Galen's writings in medicine from the time he wrote well through the sixteenth and even the seventeenth century, and the need for physicians to make sense of such a large number of his texts, it does not seem surprising that the first printed bibliography of any medical author would be De divisione librorum Galeni by the fourteenth century Italian physician Gentile da Foligno (Gentilis Fulginas) who appears to have been one of the first European physicians to perform a dissection on a human (1341). Gentile's very brief listing was first published in the collective volume, containing over ten short texts, entitled Articella su Opus artis medicinae edited by Franciscus Argilagnes of Valencia, and published in Venice by Hermannus Liechtenstein on March 29, 1483. The Articella was used as a textbook or reference work in the early medical schools. Among the other works published in that volume was the first printing (in Latin) of the Hippocratic Oath. Digital facsimile of the 1483 Articella from the Bayerische Staatsbibliothek at this link. ISTC No. ia01143000.

Gilles de Corbeil's medical poem De urinis was based on writings by Theophilus Protospatharius by way of the Articella. Poems such as this were intended as mnemonic aids for students, and they tended to be widely used. 

"Gentile's commentary de urinarum iudiciis makes a first attempt to comprehend the physiology of urine formation; aided by his dissection of cadavers, Gentile asserted that urine associated with the blood passes per poros euritides ("through the porous tubules") of the kidney and is then delivered to the bladder. Commenting on De pulsibus, he connected the relationship between fast pulse rate and urine output and correlated the color of urine with the condition of the heart. For the originality of his thought Mario Timio suggested^[8] that Gentile could be indicated as the 'first' cardionephrologist in the history of medicine." (Wikipedia article on Gentile da Foligno, accessed 1-2017). ISTC No. ia00093000. Digital facsimile from the Countway Library at Harvard at this link.

See also Carmina de urinarum iudiciis edited ab excellentissimo magistro Egidio cum expositione et commento magistri Gentils de Fulgineo noviter castigatis, Et pluribus in locis emendatis, per magistrum Auenantium, de Camerino artium & medicinae professorem (Basel, 1529) Digital facsimile of the 1529 edition from Google Books at this link.

The commentary by Gentile da Foligno upon Avicenna's Canon was among the most influential medical texts of the Later Middle Ages. See Roger K. French, Canonical medicine: Gentile da Foligno and scholasticism (Leiden: Brill, 2001).