Skip to content
PT revenue cycle knowledge center

Physical therapy billing guidance built for real claim decisions.

Move from rule summaries to claim-ready controls. These guides connect Medicare timing, therapy modifiers, authorization evidence, denial prevention and partner governance to the work queues your team manages every day.

Open the therapy units calculator Explore PT billing services
PT billing learning pathPrimary sources linked
01
Build the unit logicTimed services and documentation
GUIDE
02
Validate the modifier stackGP, KX and CQ decision gates
GUIDE
03
Prevent avoidable denialsAuthorization and POC controls
PLAYBOOK
04
Evaluate operating partnersProof, governance and transition
CHECKLIST

Start here if PT billing is new to you

The four guides build on each other. Read them in this order and each one assumes only what the previous one taught. If you already run a therapy book and just need the denial workflow, skip to guide 03.

READING PATHFour guides, in order
↔ Swipe the diagram
EACH GUIDE ASSUMES ONLY WHAT THE PREVIOUS ONE TAUGHTREAD 01The 8-minute rule01AFTER THIS YOU CANTurn treatment minutes into adefensible unit count.READ 02GP, KX and CQ02AFTER THIS YOU CANPut the right modifier on theright line, every time.READ 03Denials and auth03AFTER THIS YOU CANStop the denial before theclaim leaves the building.READ 04Choosing a partner04AFTER THIS YOU CANScore a billing company onevidence, not on promises.
Each guide links to its primary CMS or APTA source. Nothing here asks you to take a number on trust.

The four physical therapy billing guides

Every guide is built around the decision a biller actually faces, not around a summary of the regulation.

Guide 01 · timed-unit logic

Medicare 8-minute rule for physical therapy

Translate total timed treatment minutes into the maximum billable units, then allocate those units to supported services without overbilling.

  • Timed versus untimed codes
  • The unit ladder, minute by minute
  • Allocating leftover units
Open the visual guide →Guide 02 · modifier decisions

KX, GP and CQ modifiers in PT billing

See the role of each therapy modifier, the CY 2026 KX threshold and the operational evidence that should exist before claim release.

  • GP on every PT line
  • KX above the $2,480 threshold
  • CQ and the assistant standard
Open the modifier map →Guide 03 · denial prevention

PT denials and prior authorization controls

Connect benefit limits, authorization windows, plan-of-care status, documentation and payer responses in one prevention workflow.

  • Ten denial reasons, ranked by control
  • The authorization lifecycle and its leaks
  • The Medicare appeal ladder
Open the prevention playbook →Guide 04 · buyer framework

How to choose a physical therapy billing company

Compare potential partners on specialty controls, transparency, systems fit, transition discipline, security and measurable governance.

  • A weighted seven-category scorecard
  • In-house, outsourced or hybrid
  • Pricing shapes and the 90-day transition
Open the evaluation scorecard →

Run your own visit through the calculator

Reading the 8-minute rule and applying it to a real visit are different skills. The calculator does the ladder and the allocation so you can check a claim, settle an argument or test a billing vendor while they are still on the call.

Therapy units calculator for the 8-minute rule

Enter timed CPT minutes and get the billable unit count, the per-code allocation, untimed code handling and the CQ or CO payment effect. Free, no sign-in, nothing stored.

Open the calculator

Go deeper on outpatient therapy revenue

Three longer pieces that sit underneath these guides.

WHITEPAPEROutpatient therapy revenue integrity, worked end to end→ CASE STUDYTherapy authorization turnaround and the auth leak funnel→ SERVICEPhysical therapy billing services and the PT revenue command center→
From content to control

Make PT billing rules visible inside the operating workflow.

ASP-RCM maps eligibility, authorizations, POC status, timed units, modifiers, claim edits, payments and denials into a governed revenue process.

See the PT revenue command center