In my country there are 4 'billing codes' that insurance offers: up to 5 sessions, up to 10, up to 15 (that's for "long" as well as "chronic") and "specialized" which is: longer.

That doesn't include follow-ups (or pre-care or just care) by your GP and GP's psychiatric nurse; that's GP care. But that nurse is for support, check-ins, maybe cheerleading; not for therapy. Although I think seeing that person can be long-term low-frequency.

What I meant to say was: most people are done within 15 sessions. Most up-to-5/10/15-session therapists don't treat 16+ session people; not sure if that has to do with registrations or what. Probably.