Final answer:
Medicare is likely to reject a claim for OT services if E-stim is used to improve postural alignment, as it is not considered medically necessary.
Step-by-step explanation:
The type of intervention that will most likely result in Medicare rejecting a claim for OT services is providing E-stim to a patient's lower back extensors to improve postural alignment.
Medicare generally does not cover E-stim for postural alignment, as it is not considered a medically necessary intervention for this purpose. Medicare will only cover services that are deemed medically necessary and supported by evidence-based practice.
Therefore, it is important to choose interventions that are within the scope of Medicare coverage guidelines when submitting a claim for OT services to ensure reimbursement.