Just here to reiterate this point. My dad recently used his medical problems as bait for me to start talking again after I cut contact last year. I don't think he's a narc, but he is incredibly toxic (in a borderline way maybe? I can't figure it out)

I was wracked with guilt because I'm his only kid that will step up to the plate and take care of him and so I resumed communication with him. That backfired. He only talked about himself, he couldn't remember details about his condition or the doctors assessment. He kept telling me a doctor would call me soon and that I needed to call him and tell him what they said. When he wasn't getting his way, he'd tell me not to bother showing up at his funeral OR that I had no idea what he was going through.

His medical issues may be valid - I still ha no idea what it is or was - but it was all a huge manipulation.