# Reading funnelfunnelThe customer journey from awareness to purchase, typically Awareness, Interest, Consideration, Decision, Action, with prospects narrowing at each stage.View full definition → conversion and engagement metrics
A regional hospital ran a cardiology campaign that generated 40,000 ad impressionsimpressionsThe total number of times an ad or piece of content is displayed, regardless of clicks. Each display counts as one impression, even to the same person.View full definition → and a satisfied marketing director. Then the CFO asked a simple question: how many of those impressions became booked cardiology consults? Nobody knew. The campaign had no instrumentation between the ad and the appointment. That gap is where qualified patients quietly leak away.
This lesson shows you how to instrument the full impressionimpressionThe total number of times an ad or piece of content is displayed, regardless of clicks. Each display counts as one impression, even to the same person.View full definition →-to-appointment funnelfunnelThe customer journey from awareness to purchase, typically Awareness, Interest, Consideration, Decision, Action, with prospects narrowing at each stage.View full definition →, read the drop-off at each stage, and benchmark it against sector norms.
A funnelfunnelThe customer journey from awareness to purchase, typically Awareness, Interest, Consideration, Decision, Action, with prospects narrowing at each stage.View full definition → is just the sequence of steps a prospective patient takes before they book. For a hospital cardiology campaign it typically looks like this:
1. ImpressionImpressionThe total number of times an ad or piece of content is displayed, regardless of clicks. Each display counts as one impression, even to the same person.View full definition →: the ad or search result is shown.
2. Click / visit: the person lands on the cardiology service page.
3. Engagement: they read, watch a physician video, or check insurance info.
4. Lead action: they call, fill a form, or start the scheduler.
5. Appointment booked: a confirmed consult.
6. Show / kept appointment: they actually attend.
Each arrow between stages has a conversion rateconversion rateThe percentage of visitors or prospects who complete a desired action (purchase, sign-up, contact form), calculated as conversions divided by total opportunities.View full definition →. Your job is to measure all of them, because a healthy top of funnelfunnelThe customer journey from awareness to purchase, typically Awareness, Interest, Consideration, Decision, Action, with prospects narrowing at each stage.View full definition → can hide a broken bottom.
Unlike ecommerce, healthcare conversion is emotionally loaded and often phone-driven. Older cardiology patients frequently prefer calling over clicking. If you only track form fills, you can be blind to half your leads. That is why call tracking matters.
You cannot improve what you cannot see. Here are the three core instruments.
Call tracking assigns a unique phone number to each campaign or channel so you know which ad drove which call. Tools like CallRail or Invoca do this. A dynamic number insertion (DNI) script swaps the displayed number based on how the visitor arrived.
A minimal example of what DNI looks like on a landing pagelanding pageA standalone web page built for a single campaign goal, designed to maximise conversions by removing distractions and focusing visitors on one action.View full definition →:
// Visitor from paid search sees a tracked number
if (source === "google_cpc") {
document.getElementById("phone").innerText = "(555) 010-2201";
} else if (source === "facebook") {
document.getElementById("phone").innerText = "(555) 010-2202";
}Now a call from (555) 010-2201 is attributed to Google paid search. You can then measure call volume, call duration (a proxy for lead quality), and how many calls led to a booking.
One regulatory note: in the US, protected health information (PHI) discussed on tracked calls falls under HIPAA (Health Insurance Portability and Accountability Act). Recordings and any data shared with vendors need a Business Associate Agreement (BAA), a contract making the vendor legally responsible for protecting PHI. In Europe the equivalent constraint is the GDPR (General Data Protection Regulation), which requires explicit consent for recording. Do not skip this.
Track every "Request an appointment" form submission, and just as importantly, track form abandonment (people who start but do not finish). A form that asks for insurance details, referral info, and symptoms up front will bleed users. Measure the completion rate field by field.
If you use an online scheduler (Epic MyChart, Zocdoc, or a custom widget), instrument each step: slot selected, patient details entered, insurance verified, confirmation. The scheduling drop-off rate is the percentage who start the scheduler but never confirm. This is often the single biggest leak in a cardiology funnelfunnelThe customer journey from awareness to purchase, typically Awareness, Interest, Consideration, Decision, Action, with prospects narrowing at each stage.View full definition → because insurance verification friction stops people cold.
For a clean overview of event-based funnelfunnelThe customer journey from awareness to purchase, typically Awareness, Interest, Consideration, Decision, Action, with prospects narrowing at each stage.View full definition → tracking, see Google's free documentation on measuring conversions in GA4.
Let us instrument a hypothetical cardiology campaign. All figures below are illustrative, chosen to show the arithmetic, not sector data.
| Stage | Count | Step conversion |
|---|---|---|
| ImpressionsImpressionsThe total number of times an ad or piece of content is displayed, regardless of clicks. Each display counts as one impression, even to the same person.View full definition → | 40,000 | - |
| Clicks to service page | 800 | 2.0% |
| Engaged (scroll/video/insurance check) | 320 | 40.0% |
| Lead actions (calls + forms + scheduler starts) | 64 | 20.0% |
| Appointments booked | 32 | 50.0% |
| Kept appointments | 26 | 81.3% |
Overall conversion from impressionimpressionThe total number of times an ad or piece of content is displayed, regardless of clicks. Each display counts as one impression, even to the same person.View full definition → to booked appointment:
32 booked / 40,000 impressionsimpressionsThe total number of times an ad or piece of content is displayed, regardless of clicks. Each display counts as one impression, even to the same person.View full definition → = 0.08%
That number alone is meaningless without stage detail. The interesting signal is *where* the biggest relative leak sits. Here, only 50% of lead actions become bookings. If 64 people called or started a form but only 32 booked, something in the booking step (long hold times, insurance friction, no evening slots) is losing half your qualified demand.
Say your average call converts to a booking 65% of the time, but your online scheduler converts starts to bookings at only 30%. If you shift budget or UX effort to close that scheduler gap, the math is direct. Suppose 40 people start the scheduler:
That is 8 additional cardiology consults from the same traffic, no extra ad spend.
Benchmarks vary widely by specialty, geography, and channel, so treat all of these as estimates and directional ranges, not guarantees. Healthcare converts differently from retail.
The point of benchmarks is not to hit a magic number. It is to spot when one of your stages is dramatically off. If your call-to-appointment rate is 8% against a 25% to 40% benchmark, your intake team, not your ads, is the problem.
Beyond raw funnelfunnelThe customer journey from awareness to purchase, typically Awareness, Interest, Consideration, Decision, Action, with prospects narrowing at each stage.View full definition → steps, engagement signals tell you *lead quality* early:
Knowledge check
1. The CFO's question about how many impressions became booked consults exposed a core problem with the campaign. What was that problem conceptually?
2. Why is call tracking especially important in a hospital cardiology funnel compared to a typical ecommerce funnel?
3. A cardiology campaign shows a strong click-through and engagement rate but very few kept appointments. What does this pattern best illustrate?
4. Select ALL correct answers about the purpose of measuring the conversion rate at every stage of the funnel rather than just the endpoints.
Select all the correct answers.
5. Select ALL correct answers describing how dynamic number insertion (DNI) supports funnel instrumentation.
Select all the correct answers.
Knowing you lost patients at the scheduler is stage-level insight. AttributionAttributionA framework for assigning credit to the touchpoints that contributed to a conversion, so you can measure which channels and interactions actually drive results.View full definition → tells you *which channel* those leaked patients came from, so you do not over-invest in a channel that fills the funnelfunnelThe customer journey from awareness to purchase, typically Awareness, Interest, Consideration, Decision, Action, with prospects narrowing at each stage.View full definition → but never converts.
Two simple models to know:
For a cardiology campaign, watch for a channel that looks great on clicks but terrible on kept appointments. Social ads might drive cheap engaged visitors who rarely book, while branded search delivers fewer but far higher converting leads. Without stage-level attributionattributionA framework for assigning credit to the touchpoints that contributed to a conversion, so you can measure which channels and interactions actually drive results.View full definition → you would wrongly cut the wrong budget.
A practical starting point: tag every campaign with UTM parameters (the small tracking tags appended to a URL, like ?utm_source=google&utm_campaign=cardio_q1). Then join that data to your call tracking and scheduler events so one patient journey is visible end to end. Just remember the HIPAA and GDPR constraints when that data touches PHI.
The cardiology campaign from the opening scene had 40,000 impressionsimpressionsThe total number of times an ad or piece of content is displayed, regardless of clicks. Each display counts as one impression, even to the same person.View full definition → and no idea it was losing half its qualified callers at the booking step. Once instrumented, the fix was not more ads. It was three evening scheduler slots and an insurance pre-check tool. Same spend, more consults.