Physical Therapy Medical Billing & Revenue Cycle ManagementPhysical Therapy Medical Billing & Revenue Cycle Management

What makes physical therapy billing difficult?

Most therapy codes are timed, so the billed units depend on the minutes documented for each service. Payers also cap visits, require authorization renewals and expect a current, signed plan of care. A clinic that sees many patients a day can lose payment on a whole course of care because one of these was missed early.

What are the most common physical therapy billing pitfalls?

• Timed-code units and the 8-minute rule. Units for timed services such as therapeutic exercise or manual therapy are counted from total timed minutes under Medicare's 8-minute rule, while some commercial payers count each service separately. Units that don't match the documented minutes are denied or recouped.
• KX modifier and threshold tracking. Medicare expects the KX modifier once a patient's therapy spending passes the annual threshold, with documentation showing continued care is medically necessary. That means tracking each patient's running total across the year, including care from other clinics.
• Visit limits and authorization renewals. Many plans approve a set number of visits or a date range. Visits after the approval runs out are denied, so renewals have to be requested before the last approved visit.
• Plan-of-care and recertification documentation. Medicare requires a plan of care certified by the physician or other qualified practitioner, and recertification when it expires. Visits outside a certified plan are at risk even when the treatment itself was appropriate.

What causes physical therapy claim denials?

Common causes are visits beyond the authorized count or date range, units that don't match documented minutes, a missing therapy modifier such as GP, and plans of care that lapsed without recertification. Medical necessity denials also follow when progress notes don't show why care should continue.

How do you handle eligibility and prior authorization for physical therapy?

We verify therapy benefits before the first visit, including visit limits, copays and whether the plan needs authorization. Approved visits and dates are tracked per patient, and renewals are requested ahead of the last approved visit so care isn't interrupted.

How are physical therapy claims coded and submitted?

Each claim is checked for units that match the documented minutes, the therapy modifier, the KX modifier where it applies and a diagnosis that supports the plan of care. Claims go out with the authorization number and referral details the payer requires.

How do you handle payment posting and AR follow-up for physical therapy?

Payments are posted by line, so a single denied unit or a reduced visit is visible rather than hidden in a total. Unpaid visits are worked by payer and filing deadline, and denials for authorization or units are corrected and resubmitted with the notes the payer needs.

Do you handle credentialing and enrollment for physical therapists?

Yes. We help enroll physical therapists with Medicare and commercial plans and keep their enrollment current, so a new therapist can bill from their first day. Payer rules for supervising assistants differ, so we confirm each plan's requirements during enrollment.

How does onboarding work for a physical therapy clinic?

Most practices are onboarded within two to four weeks, depending on the size of the practice and how quickly payer and system access is set up. We work within your existing practice management system, so your therapists and front desk keep the tools they use today. See all the specialties we support.

Frequently asked questions

What is the 8-minute rule in physical therapy billing?

The 8-minute rule is Medicare's method for counting units of timed therapy codes. Total timed minutes for the visit are added together and converted to units, so a service needs enough documented minutes to count as a unit. Some commercial payers count each service separately instead, so we check which method applies to each plan before the claim is coded.

What does the KX modifier mean on a therapy claim?

The KX modifier tells Medicare that a patient's therapy has passed the annual threshold and that continued care is medically necessary and documented. Without it, services above the threshold are denied. Because the threshold covers all outpatient therapy the patient receives in the year, we track each patient's running total and make sure the notes support continued care.

Why are physical therapy visits denied after authorization?

Visits are usually denied because they fall outside the approved number of visits or date range, or because the billed services differ from what was approved. Renewals requested too late leave gaps in coverage. We track approved visits and dates per patient and request renewals before the last approved visit so care can continue without unpaid sessions.

Do physical therapy plans of care need to be recertified?

Yes, for Medicare. The plan of care must be certified by the physician or other qualified practitioner and recertified when it expires or when the plan changes significantly. Visits outside a certified plan can be denied even when treatment was appropriate, so we track certification dates and flag plans that are about to lapse.

Can you bill for both Medicare and commercial therapy patients?

Yes. We set up each payer's rules for units, modifiers, visit limits and authorization, because they differ between Medicare and commercial plans. Claims are checked against the rules for that patient's plan before submission, and payments are posted line by line so any difference between payers is visible in follow-up.

Related services: eligibility and benefits verification; claim creation and submission; payment posting; denial management; provider credentialing and enrollment; accounts receivable follow-up.

Related reading: the CY2027 RPM and RTM direct employment requirement; the Medicare Advantage 72-hour prior authorization clock.

Related specialties: chiropractic; orthopedics.