A patient misses a call from your office, and when they look at their phone it says "Spam Likely" — or "Potential Fraud," or nothing at all because the call was silenced. Recall visits, appointment confirmations and treatment follow-ups go unanswered, and nobody at the front desk knows why pickup rates fell.
Here's what is going on, and what you can actually do about it.
Why carriers label calls at all
Robocalls and spoofed numbers became bad enough that the mobile carriers and phone makers started scoring incoming calls. Each carrier works with analytics engines that look at signals like call volume, how often people hang up, complaints, and whether the caller ID can be verified. A call that looks risky gets a warning label, gets sent to voicemail, or is blocked outright.
A dental or medical office can trip those signals without doing anything wrong. A burst of recall calls on a Monday morning looks, to an algorithm, a lot like a dialing campaign.
What STIR/SHAKEN is
STIR/SHAKEN is the industry framework for verifying caller ID. Since June 2021 the FCC has required voice providers to implement it on their IP networks. When your call leaves your provider, the provider digitally signs it with an attestation level:
- A — full attestation. The provider knows the customer and confirms that customer is authorised to use the number shown.
- B — partial. The provider knows the customer but can't confirm they own that particular number.
- C — gateway. The provider is only passing the call along and can vouch for nothing.
Carriers' analytics treat those levels very differently. Calls signed at A are far less likely to be labelled or blocked; calls arriving at B or C start out under suspicion. Many practices are on B or C without knowing it — common with reseller phone plans, numbers ported between providers, or a main number displayed on calls that actually leave through a different line.
A-attestation helps a lot — it isn't the whole story
Honest caveat: attestation proves who is calling, not that the call is wanted. Analytics engines still weigh reputation. So the practical checklist is:
- Get your outbound calls signed at A. Ask your provider directly what attestation your calls carry. If they can't tell you, that's an answer.
- Register your numbers with the major analytics providers' caller-registry programs so your numbers are associated with a verified business.
- Use a consistent caller ID — the number patients know and can call back — rather than rotating through lines.
- Pace bulk calling. Spreading recall calls across the day looks less like a campaign than a hundred calls in an hour.
- Check for existing labels. If a number is already flagged, the analytics providers have dispute processes; registration and clean call patterns usually clear it over time.
Why it's worth the effort
For a practice, the phone is still how most appointments get confirmed and most treatment gets scheduled. A call that never gets answered costs more than the call itself — it's a missed recall, an empty chair, or a patient who drifts to another office. Fixing call reputation is one of the few IT changes that shows up directly in the schedule.