Then go to the Clinician

The Clinician's job is NOT to certify RTW. Their job is to ensure there is no Risk of harm and whether there is a Medically Required Work Disability present that prevents the worker from being in the work place.

It is important to note that most work disability is not Medically Required Work Disability and Truth 2 - An Undeniable Truth suggests that a big reason for a work absence is more likely to be Medically Discretionary Work Disability or Medically Unnecessary Work Disability and influenced by Work Disability and the Various Modifiable Factors that Influence Outcomes than it is about the medical condition alone. Remember Work Disability ≠ Medical Disability.