When evaluating potential outsource billing partners, agencies should consider 7 key factors: 1. Define your specific billing needs to identify suitable partners. 2. Check partners' experience, particularly with your industry and payors. 3. Evaluate if partners can meet your defined needs and address issues like software compatibility. 4. Consider pricing models like per patient, percentage, or per claim rates. 5. Review contract terms regarding costs, length, renewals and other fees. Taking time to evaluate potential partners across these factors helps identify the best fit.