Yes, Human Disease is definitely a goth band because most of their albums belong to the Deathrock genre, which is a core subgenre of goth music. Albums like Our Flesh Deception and Demo Recording are examples of their goth sound.
Some of the other goth artists that are similar to them are Phaidia and Strange Dolls Cult.
Human Disease is located in Italy, Lazio, Rome, active in 1997 — present. You can find more information about Human Disease on their GothDB band page.