i don't go to t on a regular basis, when actively dealing with CSA and PTSD and such i did go weekly, sometimes twice a week
that was years ago.
i now go only when i need too, sometimes once a week for a month, then not at all for seven or eight months, then maybe once or twice or maybe again six or eight sessions. No problems billing ins that i have ever heard of... t says, just come back when you feel like it. i have depression so maybe that is why, mostly i think it just depends on the t and their rules