Billing Units Calculator (Minutes to Units)
Different payers and settings convert minutes to units differently. This tool helps you estimate units from total minutes using common methods. For Medicare therapy billing, use the 8-minute rule.
Calculator
Medicare therapy billing?
Use the dedicated CPT 8-minute rule helper for therapy (PT/OT/SLP):
Open CPT 8-minute rule helperExamples
- 30 minutes: 8-minute rule → 2 units; 15-min round down → 2 units
- 50 minutes: 8-minute rule → 3 units; 15-min round down → 3 units
- 53 minutes: 8-minute rule → 4 units; 15-min round down → 3 units
FAQ
Why do different methods give different units?
The 8-minute rule uses thresholds that can “earn” an extra unit once you cross certain minute ranges, while 15-minute methods depend purely on dividing by 15.
Should I always use the 8-minute rule?
Use the rule required by your payer and setting. Medicare therapy commonly uses the 8-minute rule; other payers may differ.
Do untimed codes count toward minutes?
Typically no—untimed codes are billed separately and don’t add to timed totals.
What if I billed multiple timed codes?
Add total timed minutes across eligible timed codes for the same discipline/date, then convert total minutes to units using your payer’s method.
Is this official billing guidance?
No. This tool is informational. Confirm payer rules and facility policy for final billing decisions.