The Underground Clinic is an illegal clinic located somewhere in the Republic of East Gorteau. It is operated by the Underground Clinic Nurse.[1]
Overview[]
The clinic is filthy with corrosive walls and run-down infrastructure. It is the place where Ikalgo takes Killua after his battle with the Ortho Siblings.[1]
Plot[]
Chimera Ant arc[]
After his fight with the Ortho Siblings,[2] Ikalgo brings the fainted Killua to the clinic to have him nursed back to health. Two days pass, and Killua awakens only to be pestered by the greedy Nurse, who demands that he pay his exorbitant 
1.8 million hospital bill. Before paying, Killua demands access to the phone, which also has a hefty service fee to it. Killua manages to contact Gon] and informs him of his situation. With that squared away, Killua pays his clinic fees and leaves the underground clinic with Ikalgo by his side.[1]
Trivia[]
- The reason why Ikalgo knew about this place indicates that Gyro and his men often used this place for medical reasons.
- It is possible that the place has tight connections with the Mafia community due to its "underground status".
- It is unknown how the clinic can effectively evade the authority of the Republic of East Gorteau.