But! He is a former bites specialist at St Mungo's who spoke out against Fenrir and tried to get the Ministry to you know, do something about him, and the Fenrir decided he'd made a tasty treat and nommed him. He got away, but was turned, and since it was highly publicized and stuff, the Ministry gave him a job working as a Healer with the Werewolf Taks Force. So he's a known werewolf.
He would've shown up on Dumbledore's request, went straight for Dorcas and explained his case to Dig, then treated her nom-related injuries (as presumably her guts would be back inside of her by that point).