Is there a billable code for Post acute withdrawl symptoms from opiates and /or alcohol?

I am looking for a code that could be used to identify post acute withdrawl or Paws for short, patient is out of acute drug withdrawl and now enters the stage of post acute withdrawl which often leads to anxiety and depression , insomnia , restless leg, migranes, nightmares etc.
I wasnt able to find anything I was confident enough to code.
Anyone here that works in an inpatient drug rehab and has experience with this?
Please let me know.