Fractional CFO for Physical Therapy Practices: Visits per Therapist, Payer Mix, and Clinic Margin

You added a fourth physical therapist in March. Visits rose 22%. Clinic margin fell. That's the first scenario a fractional CFO for physical therapy practices should test, because the cause usually sits in one of two numbers: visits per therapist per day, or net revenue per visit after payer mix.

Revenue growth hides both. A clinic can add therapists, add visits, and still lose money on every new hour of capacity if the new therapist's schedule is half full or the new referrals come from the lowest-paying payer.

The number that runs a PT clinic

Visits per therapist per day = completed visits ÷ therapist clinical days worked
Revenue per therapist day = visits per therapist per day × net revenue per visit
Contribution per therapist day = revenue per therapist day − therapist cost per day − direct support cost per day

Count completed visits, not scheduled ones. Count clinical days actually worked, not days on payroll, so PTO and admin days don't flatter the ratio.

A hypothetical clinic with four therapists shows why the March hire hurt:

Visits rose 22%. Monthly contribution rose less than 3%. The new therapist added about $1,500 of contribution a month at a time when the clinic also took on recruiting cost and onboarding time. Visits per therapist per day fell because the referral base hadn't grown enough, and net revenue per visit fell because the new referrals came mostly from a lower-paying plan.

The provider-capacity model is the gate that should have run before the offer letter. In PT, the demand test is your unscheduled referral backlog and the waitlist days to a first appointment, not how busy the front desk feels.

What Medicare pays in 2026

Even practices where Medicare is a minority of visits should track its rules, because commercial contracts are sometimes written as a percentage of the Medicare fee schedule. Check whether yours are.

• Conversion factor. CMS finalized a 2026 physician fee schedule conversion factor of $33.40 for clinicians not in a qualifying advanced APM, up 3.26% from $32.35.
• Efficiency adjustment. CMS also finalized a −2.5% efficiency adjustment for non-time-based services. Check which of your billed codes it touches before you assume the conversion factor increase flows straight through.
• KX threshold. For 2026 the KX modifier threshold is $2,480 for PT and speech-language pathology combined. Claims above it without the KX modifier are denied. Targeted medical review applies at $3,000.
• PTA differential. Services furnished in whole or in part by a physical therapist assistant are paid at 85% of the otherwise applicable fee schedule amount, billed with the CQ modifier.

The KX threshold and PTA differential are both operational. A missed KX modifier is lost cash. A PTA schedule built without the 15% reduction overstates revenue.

Net revenue per visit, by payer

Gross charges tell you nothing. What matters is what each payer actually pays per completed visit, after denials, write-offs, and patient balances you don't collect.

Here's the hypothetical clinic from above, before the March hire:

Shift 10 points of share from plan A to plan B, which is roughly what the new referrals did, and the weighted figure falls to about $95.50. That's more than half of the drop to $94 in the hiring table, before any change in denials or write-offs.

Plan B looks like the worst payer, and per visit it is. But workers' comp ties up cash for 70 days. A clinic growing its workers' comp share can look more profitable and have less cash. The payer-mix margin model goes deeper on contribution by payer, and days in AR is the companion cash measure.

If your visit count is up and the clinic margin isn't, start with visits per therapist and net revenue per visit by payer. A 20-minute Leak Check can point to which one before you post the next therapist job.

Staffing mix: PT, PTA, and aides

A PTA costs less than a PT. Under Medicare, the work they furnish also pays 15% less. Whether the mix improves margin depends on the size of the pay gap compared to the revenue gap, and on supervision time.

A hypothetical comparison on 18 Medicare visits per day at $96 net:

On Medicare visits, the PTA day produces less contribution in this illustration. On commercial plans that don't apply the differential, the answer can flip. That's why a CFO models staffing mix by payer instead of adopting a blanket ratio.

Visits lost between evaluation and discharge

The other place PT revenue leaks is the plan of care. A patient is evaluated for 12 visits, attends 7, and drops off. Nobody bills the five that never happened, so nobody notices them on the P&L. They show up only as a therapist schedule with gaps.

Track three measures every month:

• Arrived rate: completed visits divided by scheduled visits. Cancellations and no-shows both count against it.
• Plan-of-care completion: visits attended divided by visits prescribed, for patients discharged that month.
• Authorization leakage: visits delivered past an expired authorization or visit limit that the payer then refuses to pay.

In the hypothetical clinic above, assume about 200 new evaluations a month at 12 prescribed visits each, 2,400 visits of prescribed care. At 60% completion that's roughly the 1,430 visits the clinic delivers. Lifting completion to 70% adds about 240 visits a month. At $94 net, that's about $22,600 of monthly revenue with no new therapist, no new lease, and no new referral source. The first fix is usually scheduling the full plan at evaluation instead of one visit at a time.

That's also why a CFO looks at the front desk as a revenue role. Scheduling, authorization tracking, and reminder workflows decide how much of your existing referral base becomes paid visits.

Clinic margin, not company margin

Multi-clinic practices often report one P&L. That averages a strong clinic with a weak one and hides the decision. Each clinic should have its own contribution line: clinic revenue minus clinic therapists, support staff, rent, and supplies. Shared billing and leadership sit below that line.

Bennett's 60-15-15 standard applies at the company level. At the clinic level, the question is simpler: does this clinic's contribution cover its share of central overhead and still leave profit? If not for two consecutive quarters, it needs a plan, a price change, or a closure decision. The multi-location benchmarks page covers how to allocate shared cost.

The first 90 days with a fractional CFO

That sequence is how Bennett's fractional CFO services start for a practice, at $5,000 a month with bookkeeping, tax returns, and tax planning included. Practices with chiropractic alongside PT can compare the visit economics in the chiropractic CFO guide.

Before you hire again, calculate visits per therapist per day for each clinic over the last 90 days, using completed visits and actual clinical days. If any clinic is below what its schedule template assumes, that clinic has capacity you're already paying for, and a Leak Check on therapist productivity and payer mix will show what it's costing you.