Audiology Annual Hearing Test Recall: 4.1% Response on 480 Patients

The challenge

Northbrook Hearing was a textbook quiet-revenue-leak case. The owner had built a base of 950 active patients, mostly age 60+, who had bought hearing aids over the past 6 years. Annual hearing-test compliance was the linchpin: tests caught hearing changes that drove fitting adjustments, replacement aid purchases, and accessory sales. But a 14-month audit showed 480 patients — half the base — had drifted past their annual.

The clinic's existing recall was a phone call from the patient-care coordinator, who could realistically work through about 30 patients a week. At that pace, the lapsed list grew faster than she could shrink it. Email open rates on this older demographic were under 15%; SMS, untested, but the coordinator was skeptical about texting 70-year-olds.

The owner-audiologist saw three risks in the gap: clinically, untested patients miss hearing decline windows; commercially, replacement-aid revenue (averaging $4,200 per fitting) goes to the audiologist who shows up first when the family finally gets involved; reputationally, lapsed patients tell friends "I haven't heard from them in years" rather than recommending the practice.

The PostKnock approach

Playbook used: Annual Hearing Test Reminder

We deployed PostKnock's Annual Hearing Test Reminder playbook with creative tuned for an older demographic — larger type, high-contrast layout, and copy that read as a clinical letter rather than a marketing offer. The 480-patient list was segmented by aid age: 0-3 years (200, low-priority recall), 3-5 years (180, primary target — entering replacement window), 5+ years (100, urgent replacement-window).

Wave 1 went out as a 6x9 postcard with a personalized greeting referencing the patient's last test date and a single CTA: schedule a complimentary annual hearing check (already a covered benefit on their ongoing care plan). The card included both QR and a large-print phone number — most of these patients would call, not scan. Three days after drop, the patient-care coordinator worked through Wave 1 non-responders with a script the owner approved personally.

Wave 2 dropped at week 5 with different creative — a softer "family check-in" angle the playbook surfaces specifically for older audiences (research shows hearing-aid replacement decisions are family-driven). The Wave 2 copy gently invited the patient to bring a spouse or adult child to the appointment. Total: 960 pieces, ~120 outbound calls, 8-week campaign. The coordinator now had postcards softening the call landings — patients picked up more readily.

Campaign timeline

Week 0

EMR export, 3-tier segmentation, large-print proof review.

Week 1

Wave 1 drops (480 cards). Personalized last-test date.

Week 2

Coordinator runs follow-up calls. 110 dials, 64 connects (older demographic answers).

Week 3-4

Bookings flow. 12 hearing tests scheduled.

Week 5

Wave 2 drops (480 cards). Family-check-in angle.

Week 6

Wave 2 follow-up calls. 38 incremental dials.

Week 8

Final tally: 20 booked tests, 3 progressing to replacement-aid fitting.

Results

Twenty booked annual tests across 480 unique recipients lands at 4.1% response — solidly in the 3-6% healthcare recall range. The visible revenue here is modest: 20 tests at $185 each ($3,700) plus accessory and battery sales averaging $130 across 17 of the visits ($2,210). The real number is in the conversion tail — three of the 20 patients progressed to replacement-aid fittings during or shortly after the visit window, averaging $2,963 each (entry-level binaural fitting), for an additional $8,890.

Total revenue: $14,800 against $2,640 in campaign cost — $576 in postcards (960 at $0.60), $297 in PostKnock Pro for 3 months, and $1,767 in coordinator labor. ROI of 5.6x is conservative because we excluded the 12-month replacement-aid pipeline that typically follows annual tests. The owner's main observation: the postcards turned cold callbacks into warm ones. Patients picked up the phone after a card, not before.

“These patients aren't ignoring me — they're ignoring email. The card sat on their counter for a week. By the time my coordinator called, they were ready to talk.”

— Owner-Audiologist, Northbrook Hearing (composite illustration)

What we’d do differently

• Large-print layout is non-negotiable for an audiology recall. Our first proof had a too-small offer line; we caught it before sending. PostKnock's audiology template now defaults to 16pt minimum body copy.
• Phone, not QR, was the dominant response path. About 80% of bookings came via phone callback, not QR scan. We'd put the phone number in larger type next time and de-emphasize the QR.
• The family-check-in Wave 2 angle pulled three replacement-aid conversations that wouldn't have surfaced from a clinical-only message. Worth the second wave even if the booking count is modest.