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Physical therapy has a measured phone problem, which is rare in this field. In the largest US study of outpatient PT attendance - 444,995 patients across 697 clinics in 26 states - 73% of patients failed to show for at least one appointment, with per-appointment no-show rates of 15% to 31%, and two of the predictors were longer time between scheduling and the visit and prior cancellations (Bhavsar et al., PLoS One 2021). Both are scheduling behaviours. Voksha at $19 for 20 calls (Starter $14 for 15 calls, plus 5 extra calls at $1) or another AI receptionist addresses them. On the Enterprise plan only, Voksha offers HIPAA compliance with BAAs, GDPR and CCPA compliance, and a 99.9% uptime SLA, which matters here because a PT clinic's answering service needs a BAA.
Four options are compared below, three with prices checked September 2026, along with the two call types that must never be automated in this vertical: insurance coverage questions, and anything clinical. Voksha publishes this guide and is one of the four. See How this guide was sourced.
Key Takeaways
- The no-show problem is documented, unlike in most verticals. 73% of patients missed at least one visit; per-appointment rates ranged 15% to 31% across clinics, states and providers (Bhavsar et al., PLoS One 2021, n=444,995, 697 clinics, 2016-2017). Predictors included longer scheduling lag and prior cancellations.
- Clinical capacity is growing faster than the desk that books it. Physical therapists grow 12% from 2025 to 2035 and PT assistants 23%, while receptionists decline 2% (BLS, BLS, BLS).
- At 20 calls the range is $19 to $49; at 100 calls it is $99 to $149. Voksha $19 (Starter $14 + 5 calls at $1)/$99 (Premium), Dialzara $29/$135, Rosie $49/$149; Goodcall pricing not published in our checked data. ANALYSIS from published plans, prices checked September 2026.
- A PT clinic that bills electronically is a covered entity, and its answering service is a business associate. HIPAA defines the latter as a person who "creates, receives, maintains, or transmits protected health information" on the covered entity's behalf (45 CFR 160.103). A signed BAA is required (Voksha offers BAAs on its Enterprise plan).
- Never automate a coverage answer. For CY2026 the Medicare KX modifier threshold is $2,480 for PT and SLP services combined, the targeted medical review threshold is $3,000, and "claims for services over the KX modifier threshold amounts without the KX modifier are denied" (CMS). These change annually. A system guessing at coverage creates real financial harm.
- Referral requirements differ by jurisdiction. APTA states that all 50 states, DC and the US Virgin Islands provide some form of direct access, but "the specific provisions and limitations differ across jurisdictions" (APTA). Route that question to staff.
The no-show problem, with a real number attached
The finding that matters commercially is not the headline 73%. It is that scheduling lag predicts non-attendance. A patient who rings on Tuesday and is booked for three weeks' time is measurably more likely not to arrive than one booked for Thursday. Answering the phone faster and booking sooner is not a soft benefit here; it acts on a documented predictor.
Cancellation handling is the other one. Prior cancellations predicted future no-shows, and a cancelled slot that nobody fills is lost revenue twice over. Capturing a cancellation at 9pm and passing it to staff, so they can offer the slot to a waitlist first thing, is the clearest automation win in this vertical.
One honest caveat about the number. The study is US outpatient PT at a single large commercial provider, using 2016-2017 data. A second study, in an outpatient rehabilitation department in Riyadh in 2023, found a 21% no-show rate across 1,712 appointments (AlOsaimi et al., Health Sci Rep 2025) - consistent with the US per-appointment range, but a single non-US department. Published outpatient no-show rates vary widely by setting and payer mix. Treat 15% to 31% as the range, not 73% as the rate.
The two calls to never automate
Most of a PT clinic's phone volume is safely automatable. Two categories are not, and both are specific to this vertical.
Insurance, benefits and authorization questions. This is not a general caution, it is arithmetic that changes every year. CMS sets a KX modifier threshold of $2,480 for PT and speech-language pathology services combined for CY2026, a separate $2,480 for occupational therapy, and a targeted medical review threshold of $3,000. Its guidance states that "claims for services over the KX modifier threshold amounts without the KX modifier are denied" (CMS, retrieved 2026-09-21).
A system that confidently tells a Medicare patient they are covered, when they are past a threshold nobody checked, has created a bill. Route every coverage question to billing staff.
Whether a patient needs a referral before being seen. APTA states that patients in all 50 states, DC and the US Virgin Islands "have either provisional or unrestricted direct access to physical therapist services for evaluation and treatment," but also that "even though patients may go directly to a physical therapist without a referral, some provisions tied to treatment absent a referral still persist in a number of states" (APTA, retrieved 2026-09-21). This guide does not say what applies where. The answer depends on your jurisdiction and often on the patient's payer, which is exactly why it belongs with a person.
Clinical calls - a pain flare-up, post-operative restrictions, whether to continue an exercise - route to the therapist. Red-flag symptoms such as chest pain or new severe neurological symptoms need a hard escalation path with an emergency instruction, configured and tested before go-live.
The HIPAA requirement
HIPAA defines a covered entity to include "a health care provider who transmits any health information in electronic form in connection with a transaction covered by this subchapter," and a business associate as a person who, on a covered entity's behalf, "creates, receives, maintains, or transmits protected health information for a function or activity regulated by this subchapter" (45 CFR 160.103, retrieved 2026-09-21).
A PT clinic billing insurance electronically meets the first definition. An answering service taking a patient's name, referral source and reason for calling meets the second. The consequence is a signed Business Associate Agreement, obtained before the system takes a call - not a vendor claiming to be "HIPAA compliant," since no certification body exists to make that claim mean anything. For the record: Voksha's HIPAA compliance with BAAs is on the Enterprise plan only; Starter and Premium do not include a BAA.
What the four cost
Competitor figures from Voksha's pricing-comparison data (prices checked September 2026), monthly billing, at a 3-minute average call.
| Service | Entry | Included | Overage | Metered by | At 100 calls |
|---|---|---|---|---|---|
| Voksha | $14/mo | 15 calls | $1/call | Call | $99 |
| Dialzara | $29/mo | 60 minutes | $0.48/min | Minute | $135 |
| Rosie | $49/mo | 250 minutes | not published | Minute | $149 |
| Goodcall | Pricing not published in our checked data | - | - | - | - |
Rosie publishes no overage rate, so the $149 is its next tier rather than a calculation. Dialzara at 100 calls is Business Pro $99 + 80 minutes at $0.45 = $135. Voksha at 100 calls is Premium $99 (150 calls included); a PT clinic that needs a BAA should price Voksha Enterprise, from $990 a month. Note that Voksha Starter answers every call, captures caller details and follows your script but does not book appointments; calendar booking is on Premium and Enterprise. ANALYSIS.
Sources: Dialzara pricing, checked September 2026, Rosie pricing, checked September 2026, Goodcall. Voksha verified 2026-09-07 against voksha.com/pricing, which blocks automated retrieval - disclosed rather than presented as same-day.
Why after-hours matters in PT
32% of calls arrive outside 9-to-5 weekdays and 23% at weekends (Voksha After-Hours Economy Report), so roughly a third of a clinic's calls land when the front desk is closed.
Connect that to the scheduling-lag finding. A patient who rings on Saturday and reaches voicemail is not booked until Monday at the earliest, which extends the gap between scheduling and the visit - the predictor the study identified. The evening cancellation is the same mechanism in reverse: captured at 8pm and passed to staff, the slot can be offered to someone else first thing; discovered Monday morning, it is often gone.
This is one of the few verticals where the after-hours argument connects to a peer-reviewed outcome rather than to intuition about lead response.
How this guide was sourced
Written by the Voksha engineering and content team (voksha.com). Voksha sells a 24/7 AI receptionist and answering service and is one of the four options listed above - and the chart shows a dedicated receptionist matching or beating every software option per call, because that is what the published figures produce.
Sources and retrieval dates, all 2026-09-21 unless stated:
- Bhavsar NA, Doerfler SM, Giczewska A, et al. "Prevalence and predictors of no-shows to physical therapy for musculoskeletal conditions." PLoS One. 2021;16(5):e0251336. PMID 34048440. Full text - 444,995 patients, 697 clinics, 26 states, 2016-2017; 73% missed at least one appointment; per-appointment rates 15-31%
- AlOsaimi RB, Aljehani NM, Aljuhani T. "Examining the Reasons for Patient No-Show in an Outpatient Adult Rehabilitation Department..." Health Sci Rep. 2025;8(5):e70783. Full text - 366 no-shows of 1,712 appointments, reported as 21%
- 45 CFR 160.103 via GovInfo - covered entity and business associate definitions, quoted verbatim
- CMS, Therapy Services - CY2026 KX modifier threshold $2,480 for PT and SLP combined, MR threshold $3,000, denial language quoted verbatim
- APTA, Direct Access by State and State of Direct Access report - quoted verbatim
- BLS, physical therapists - $102,760 median, $49.40 hourly, 283,700 jobs, +12% to 2035
- BLS, PT assistants and aides - assistants $68,380 median, 114,100 jobs, +23%; aides $35,240, 49,000 jobs, +4%
- BLS, receptionists - $38,010 median, $18.27 hourly, 947,500 jobs, -2% to 2035
- Dialzara pricing, checked September 2026, Rosie pricing, checked September 2026, Voksha vs Goodcall; Goodcall pricing not published in our checked data
- Voksha pricing - retrieved 2026-09-07; the page blocks automated retrieval, disclosed rather than presented as same-day
What this guide does not claim. No figure for how a PT clinic's calls break down by reason appears here, because no source in the allowed set publishes one. The call taxonomy above is a description of the workflow, not a measured statistic. We do not state a count of states with unrestricted versus provisional direct access, because that breakdown sits in a PDF we could not extract text from.
We also excluded several broader outpatient no-show benchmarks that appeared in search, because the underlying papers could not be opened to verify them.
On regulation: this guide quotes the CFR, CMS and APTA, and interprets none of them for your clinic or your jurisdiction. The CMS thresholds cited are CY2026 figures and change annually - re-check them rather than trusting this page in a later year, and confirm your HIPAA and billing obligations with your own counsel.
Derived costs are marked ANALYSIS with the arithmetic shown. No competitor blog or third-party roundup was used as evidence.
The Voksha figures used come from the After-Hours Economy Report, first-party data with published methodology. No unpublished Voksha telemetry appears here.
Frequently Asked Questions
Which AI receptionist is best for a physical therapy clinic?
On price alone, Voksha: Starter is $14 for 15 calls, then $1 per call ($19 at 20 calls), and answers and captures caller details; Premium is $99 for 150 calls and adds calendar booking. But the BAA is the gating question, and Voksha's BAAs are on the Enterprise plan (from $990 a month). See Voksha's physical therapy AI receptionist page for plan details.
How much does it cost?
$19 to $149 a month at 20 to 100 calls across the three options with checked prices here (prices checked September 2026). A clinic that needs a BAA from Voksha is on Enterprise, from $990 a month.
Will it actually reduce no-shows?
It can act on two of the documented predictors. In the largest US study, longer time between scheduling and the visit and a greater number of prior cancellations both predicted non-attendance. Answering faster, booking sooner and capturing cancellations out of hours for staff to act on address both. It cannot change the patient-characteristic predictors the same study found, and no honest vendor should claim a specific percentage reduction.
Can it answer insurance questions?
No. Medicare's CY2026 KX modifier threshold is $2,480 for PT and SLP combined and claims over it without the modifier are denied. Those figures change annually and depend on the patient's history. Route every coverage question to billing staff.
Can it tell a patient whether they need a referral?
No. All 50 states, DC and the US Virgin Islands provide some form of direct access, but provisions differ by jurisdiction and often by payer. That is a staff question.
Does it work with WebPT or Jane?
WebPT describes itself as built specifically for rehab therapists, and Jane publishes a dedicated physical therapy product. Neither is one of Voksha's self-serve connectors (Google Calendar, Microsoft Outlook, Apple iCloud, Mindbody, Square Appointments and Booker); check the connector directory and set them up with Voksha support where listed. All Voksha integrations need the Premium or Enterprise plan. Ask any answering vendor whether it writes a structured record back into the system or only emails a summary, because a cancellation that does not reach the schedule has not been captured.
Conclusion
Physical therapy is the rare vertical where the case for answering the phone faster rests on a peer-reviewed finding rather than a vendor statistic. Scheduling lag and prior cancellations predict no-shows, and both respond to how quickly a clinic picks up and rebooks.
Automate scheduling, cancellation capture (so staff can backfill from the waitlist) and new-patient intake. Route coverage questions to billing, referral questions to staff, and clinical questions to the therapist. Get the BAA signed first (with Voksha, that means the Enterprise plan), confirm your obligations with your own counsel, and re-check the CMS thresholds every year, because the number in this guide expires.
