What drives patient acquisition cost for dental groups and med spas?
Patient acquisition cost is ad spend divided by new patients who actually show up, so phone handling and follow-up move it as much as cost per click does. Patient Prism's 2025 Dental Patient Access Report counted 1,445,814 callers across 8,280 dental and DSO locations who walked away without an appointment, and 890,621 of them never got a callback.
Your ad agency never sees that part of the funnel. Its report ends at the lead. If you run a multi-location dental group, a DSO or a med spa brand spending serious money on ads, the math between the click and the chair is where most of your patient acquisition cost gets decided, and it's what this guide covers.
How many dental calls go unanswered or never get a callback?
A lot. Patient Prism analyzed 11,552,668 calls to 8,280 dental and DSO locations and found 31 of every 100 calls hung up before reaching an agent. About 12.5% of all callers walked away without booking, and roughly 62% of those walkaways never heard back from the office.
Patient Prism sells call tracking and coaching, so it has a reason to publish this, but the counts come from recorded calls. Spread across the dataset, that's about 175 walked-away callers per location.
Each one already cost you money. The dental median cost per click is $8.00 in LocaliQ and WordStream's 2026 benchmarks, as reported by PPC Land, and a caller has already clicked, read your page and decided to dial before your phone rings out.
When do patients book, and why does after-hours coverage matter?
A big share of patients book outside office hours. Zocdoc's data shows 43% of its bookings happen outside office hours, more than half are booked within four days of deciding they need care, and patients compare an average of 21 providers. An office that only answers 8 to 5 misses a large part of that window.
Twenty-one providers is the number I'd tape to every front desk. A caller who hits voicemail at 7 pm has twenty other options one tap away.
Our own calendar data points the same direction on show rates. Over 45 days, appointments our AI agents booked went 10 showed and 14 no-shows. The people who showed were mostly booked within 24 hours. The no-shows were mostly booked 2 to 5 days out, and one came from a wrong time zone on the booking. Booking fast and booking soon helps the show rate as well as the booking rate.
How does better phone handling change patient acquisition cost?
Fixing the phones lowers patient acquisition cost by getting more patients in the chair from the same spend. In the hypothetical below, a group spending $50,000 a month goes from $97 per new patient to $66 by answering more calls, calling back hang-ups fast, and booking closer to the call.
This is a hypothetical worked example, not client data. Ten locations, $50,000 a month in ads, 2,000 new-patient calls and inquiries. The baseline uses Patient Prism's 31 in 100 hang-up rate. The 50% booking rate, the share of hang-ups recovered and the show rates are my assumptions, so swap in yours.
| Hypothetical (10 locations) | Current front desks | Desks + 5-minute callbacks | AI agent + text-back |
|---|---|---|---|
| Monthly ad spend | $50,000 | $50,000 | $50,000 |
| New-patient inquiries | 2,000 | 2,000 | 2,000 |
| Reached someone | 1,380 (69%) | 1,690 (half of hang-ups recovered) | 1,900 (95%) |
| Booked (50% of reached) | 690 | 845 | 950 |
| Show rate | 75% | 75% | 80% (booked sooner) |
| New patients seen | 518 | 634 | 760 |
| Patient acquisition cost | $97 | $79 | $66 |
Hypothetical. Hang-up rate from Patient Prism's 2025 report; booking rate, recovery and show rates are assumptions.
For med spas the stakes per patient run higher. AmSpa's 2024 State of the Industry report puts average annual med spa revenue at $1,398,833, up from $1,307,587, across 10,488 med spas (up from 8,899). It also found 81% are single-location and only 3% are private equity owned, and AmSpa puts the industry above $17 billion, growing more than $1 billion a year. More operators are bidding on the same searches every year, and the multi-location brands in that small group feel a few lost consults per site every week.
Front desk, central call center or AI agent: what fits a multi-location group?
For new-patient calls at scale, an AI agent on every line, with handoff to the front desk, gives the most coverage per dollar. Front desks are strongest with patients standing in the office and existing patients. Central call centers add after-hours reach, but they cost per seat and still put callers on hold at peak times.
| Front desk per location | Central call center | AI agent + text-back | |
|---|---|---|---|
| Hours covered | Office hours | Extended, by contract | 24/7 |
| Monday morning rush | Rings out during check-ins | Hold queue | Answers many calls at once |
| Consistency across offices | Varies by office | Scripted | Same script, each office's details |
| Books into the right office | Its own schedule | If given access | Yes, by location |
| Hang-ups and web forms | When someone has time | Sometimes | Text and call within a minute |
| Best at | In-office patients, insurance, treatment plans | Overflow, recall lists | First contact, new-patient booking, reminders, no-show rebooking |
The front desk still matters. The agent clears the phone so the person at the desk can look up from the screen and talk to the patient in front of them. Here's how our voice agents hand a call to staff when a human should take it.
How do you keep an AI agent HIPAA-safe for scheduling?
Keep the agent and every text to scheduling. Collect name, phone, preferred location and time, new or existing patient, and the visit type (cleaning, consult, something urgent), and leave clinical details for the office. Texts confirm a time and a place, never a diagnosis or a treatment.
- Write texts and voicemails like this: "Your appointment at our Elm Street office is Tuesday at 10 am." Leave the procedure out.
- Get a business associate agreement (BAA) from any vendor that stores or handles patient information, including your phone and texting tools.
- Send anything clinical (pain, swelling, post-op questions, a reaction after a treatment) to a person or the on-call provider.
- Limit who on your team can open call recordings and transcripts.
None of this is legal advice. Have your compliance lead sign off on the script and the text templates before launch.
What should a multi-location group measure each week?
Track patient acquisition cost by location, not as one blended number. For each office, watch new-patient calls, the share answered live or by the agent, hang-ups called back within five minutes, appointments booked, show rate and ad spend. A blended number hides the office that is losing a third of its calls.
Speed to callback is the lever with the most research behind it. In the 2011 Harvard Business Review study of online leads, firms that contacted a lead within an hour were nearly seven times as likely to qualify it as firms that waited longer, and 23% of companies never responded at all (summarized by Ainora).
Running ads across several offices and losing patients at the phone?
KenjiAI puts an AI agent on every office's line that answers, books into that office's schedule, calls back hang-ups and texts web leads within a minute, with texts kept to scheduling only. It runs inside a CRM with reminders and reporting by location, and we build it with you. See how a partnership works.
Where should you start?
Pick your two highest-spend locations. For one week, count new-patient calls, hang-ups, and how many of those hang-ups got a callback the same day. If more than a quarter of callers walk away without booking, put the AI agent on those two offices first and compare their patient acquisition cost to the rest after 30 days.
If you want us to set that up and run it with you, start at kenjiai.com/partnerup.