Oeuvres complètes d’Hippocrate. Traduction nouvelle avec le texte grec en regard, collationné sur les manuscrits et toutes les éditions: Accompagnée d'une introduction de commentaires médicaux, de variantes et de notes philologiques; suivie d'une table générale des matières par É[mile] Littré. 10 vols.

The above bilingual edition was the result of 22 years of continuous labor, remains the most significant edition overall. For a detailed bibliography of modern editions and translations see Paul Potter, Short handbook of Hippocratic medicine, Quebec, 1988. Digital facsimile of the Littré edition from the Internet Archive at this link.

Between 1932 and 1934 Javal and Bourdeaux and Javal and Leblanc of Paris published an illustrated edition of the Littré translation in 4 volumes, with 64 color plates by Kuhn-Régnier in the art-deco style. This may be the only art book style illustrated edition of Hippocrates' complete works ever published.