ἄλλῳ δὲ χαρίσματα ἰαμάτων ἐν τῷ αὐτῷ πνεύματι

allō de charismata iamatōn en tō autō pneumati

…to another, gifts of healings, by the one Spirit.

Not one gift, not one healing — gifts of healings, and the same double plural again at 12:28 and 12:30 ("do all have gifts of healings?"). When an inspired writer repeats an unusual form three times, the grammar is making a point. We should listen to it.

πάντα δὲ ταῦτα ἐνεργεῖ τὸ ἓν καὶ τὸ αὐτὸ πνεῦμα, διαιροῦν ἰδίᾳ ἑκάστῳ καθὼς βούλεται

… diairoun idia hekastō kathōs bouletai

…the one Spirit works all these, distributing to each one individually as He wills.

A χάρισμα is, by its root (χάρις, grace), a gift — received, not generated. So no one "has healing" in their pocket. Each cure is a fresh grace, given in the moment as the Spirit chooses. That guards us from both pride and presumption.

διαιρέσεις χαρισμάτων εἰσίν, τὸ δὲ αὐτὸ πνεῦμα

diaireseis charismatōn eisin, to de auto pneuma

There are varieties of gifts, but the same Spirit.

Paul's whole frame is variety within unity. So here is the case: the double plural may mean that, just as gifts differ, so do healings — one grace for this affliction, another for that; one cure flowing through this servant, another through that. Not "a healer," but many particular graces, distributed across the body. Held as a reasonable reading of the plurals — not as a proof text.

… ἐπιθεὶς τὰς χεῖρας αὐτῷ ἰάσατο αὐτόν … οἱ λοιποὶ … ἐθεραπεύοντο

… iasato auton … hoi loipoi … etherapeuonto

…laying hands on him, he healed him … and the rest who had diseases also came and were healed.

Scripture shows healings flowing in particular ways — Publius's father of fever and dysentery first, then "the rest." Across the Acts there are distinct signs in distinct moments; and in the long history of the church some servants have seemed to carry consistent fruit in particular areas — certain conditions, again and again. The double plural gives that observation a home: many gifts, for many cures. Observe such patterns honestly, but hold them loosely.

ἑκάστῳ δὲ δίδοται ἡ φανέρωσις τοῦ πνεύματος πρὸς τὸ συμφέρον

… hē phanerōsis tou pneumatos pros to sympheron

…to each is given the manifestation of the Spirit for the common good.

Whatever the variety, the aim is one: the common good, not the healer's name. Desire the gifts earnestly (12:31), but "pursue love" first of all (14:1). Many gifts, one Spirit, one Body, one purpose — the mercy of God reaching the sick through His people.