Most practices price a missed call as “one missed appointment,” and then multiply by their new-patient value. The number is directionally right and materially too low, because the call you missed was never just one appointment. It was the appointment, the reschedule chain that appointment would have triggered, and in some cases a patient you won’t hear from again for years.
This is the working model we use on demo calls. Run it against your own numbers and you’ll usually land in a range that changes what “fix the phone” means to your team.
Why average new-patient value underestimates the loss
Average new-patient value (ANPV) captures the first visit and sometimes the first treatment plan. It does not capture:
- The reschedule that never happens. A missed initial-consult call is rarely a one-call loss. The patient who never gets their first consult doesn’t become a patient who misses follow-ups.
- The recall and hygiene cadence. A hygiene patient who stops calling in is gone from the recall schedule, which is the most predictable production you have.
- The lifetime tail. A family that books with you becomes years of production. Pricing a missed call at first-visit value prices a ten-year relationship at one afternoon.
A common working adjustment: for new-patient and consult calls, use 1.5-2x first-visit value. For established-patient scheduling calls, first-visit math is fine, because you’re mostly protecting one appointment.
Building the missed-call cost model
Five inputs, all available from your PMS and phone system:
- Weekly incoming calls. Your phone system knows this. If you don’t know it, that’s the first problem to fix.
- Missed-call rate. The working number we model against across US dental practices is about 28% of incoming calls going unanswered, across business and after-hours windows. Your own number is in your call logs.
- Share of missed calls that carry booking intent. Not every call is a booking. From the calls we’ve reviewed, roughly 40-60% of missed business-hours calls were trying to book, move, or confirm something.
- Recovery rate on missed calls. The share of missed calls that eventually get booked anyway (see the voicemail section below).
- Value per booked call. ANPV for new patients, appointment value for established patients.
The formula:
Cost per week = weekly calls × missed rate × booking-intent share × (1 − recovery rate) × value per booked call
Worked example with the working numbers: 500 calls/week × 28% × 50% × 70% unrecovered × $120 average value = $5,880/week, or about $306k/year, in production that went to voicemail. Your practice’s number will be different. The shape of the formula is the point.
After-hours vs. peak-hour calls: different prices
Not all missed calls are worth the same, because the caller’s alternatives differ.
- After-hours and weekend calls have the highest booking intent of any window: people call when the problem happens, not when your office is open. They also have the most alternatives: the next practice open, a different provider, or doing nothing. A missed 9 pm call is the most expensive kind you’ll ever miss.
- Peak-hour calls (7-10 am, 3-5 pm) are booking-heavy but callers have patience. They’ll call back. The cost per miss is lower, but the volume is high, so it still adds up.
- Mid-day calls skew to status and insurance questions. Lower booking intent, lower per-call price. But a missed “is my appointment confirmed?” call still converts to a no-show, which costs real chair time.
Price them separately. If your after-hours volume is more than a handful of calls a week and every one of them goes to voicemail, that single window probably exceeds your total peak-hour loss.
Where voicemail actually recovers, and where it doesn’t
Voicemail is not zero. It recovers some calls, but the recovery is predictable and lopsided:
- It recovers: low-urgency scheduling from established patients who will call back tomorrow, and callers who are used to leaving messages.
- It doesn’t recover: new patients (no relationship, instant alternative), urgent calls (they’re already elsewhere), and any caller who reaches the second voicemail. Each unanswered retry is a confidence drop, not a retry.
Two practical rules from the patterns we’ve seen: recovery drops sharply after the first unanswered attempt, and a voicemail left by you (a callback offer, a confirmation) recovers far more than a voicemail left by the caller. The difference between “the practice never called me back” and “the practice called me back the same evening” is the difference between a patient and a complaint.
That’s the core of the (1 − recovery rate) term: assume voicemail recovers maybe a third of booking-intent calls, not most of them.
A template you can drop into your numbers
Copy this into a spreadsheet and replace the working numbers with your own:
| Input | Working number | Your number |
|---|---|---|
| Weekly incoming calls | 500 | |
| Missed-call rate | 28% | |
| Booking-intent share of missed calls | 50% | |
| Recovery rate on missed calls | 30% | |
| Value per booked call | $120 |
Multiply across. Then do the same math three times (after-hours, peak-hour, mid-day), with each window’s own rates. Three numbers that show you exactly where the money is leaking, and what an always-answered line is worth before anyone quotes you a price.
If the after-hours number surprises you, it should: it’s the window most practices price at zero because they don’t hear the calls. That’s the point of measuring it.