If your appointment reminder texts suddenly stopped arriving, or a patient told you they never got the message, there is a decent chance the cause is not your software. It may be a registration step that the wireless carriers now require for business texting. The jargon is unfriendly, but the idea is simple enough for a practice owner to manage.
This article explains the terms in plain language and lists what to do. It is general information, not legal advice. Your attorney should confirm how texting rules apply to your practice.
What A2P 10DLC means
"A2P" stands for application-to-person: a message sent by software to a human, such as a reminder from your scheduling system. "10DLC" stands for 10-digit long code, which just means a normal-looking local phone number.
Carriers noticed that regular local numbers were being used to send large volumes of marketing and spam. In response, they introduced a registration system. A business that wants to send automated texts from a 10-digit number must register itself (a "brand") and describe what it plans to send (a "campaign"). Unregistered traffic can be filtered, delayed, or blocked, and carriers can charge fees for it. The details, costs, and review times differ by messaging provider and change over time, so confirm them with yours.
Why practices get blocked
The most common reasons texts fail:
- No registration. The practice never completed brand and campaign registration, or the number was ported without moving the registration.
- Mismatched information. The business name, address, or website in the registration does not match public records or the site.
- Vague campaign description. Reviewers want specifics: who you text, what you send, and how people opt in. "Marketing messages" is too thin.
- No clear opt-in. The sign-up form lacks language telling the person they agree to receive texts, how often, and how to stop.
- Prohibited content. Messages that look like deceptive or restricted content can be flagged. Healthcare is allowed, but wording that sounds like unverified medical claims or a high-pressure offer can attract filtering.
What a compliant program looks like
Think of it in four parts: permission, content, timing, and records.
Permission
Get clear, written consent before sending marketing texts. For appointment reminders and similar service messages, the rules can differ from marketing, but many practices treat all texting with the same care. Your intake form should say, in plain language, that the patient agrees to receive texts from your practice, that message and data rates may apply, that message frequency varies, and how to stop by replying STOP. Link to a privacy policy that covers texting.
Content
Keep texts short and useful. Identify the practice by name. Do not put sensitive health details in a text. "Reminder: your appointment with [Practice] is tomorrow at 3:00. Reply C to confirm" is fine. A message that names a specific condition is risky if the phone is shared or seen by others.
Timing
Send during reasonable hours in the recipient's time zone, and avoid late nights and early mornings. Do not text people who have opted out. Honor STOP immediately and set your system to stop all marketing messages from that number.
Records
Keep records of when and how each person opted in, including the form version and timestamp. If a complaint or carrier inquiry comes, those records are your defense.
A step-by-step setup checklist
- Decide which messages you will send: reminders, confirmations, review requests, follow-ups, or promotions. Each category may need its own opt-in wording.
- Gather business details: legal name, address, tax ID, website, and a contact person, exactly as they appear on your official documents.
- Update your website and intake forms with opt-in language and a texting policy link.
- Register your brand and campaign with your messaging provider, using specific descriptions and sample messages.
- Wait for approval before sending live traffic. Test with a handful of internal numbers first.
- Create automatic replies for STOP and HELP.
- Document your process and train your team so staff do not text patients from personal phones.
- Review message delivery reports monthly, and re-register if you change numbers, names, or providers.
Mistakes we see most often
Practices often buy a new number for a campaign and assume registration carries over. It does not. Others copy a competitor's opt-in language, which may not match their own practices. Some staff text from a personal cell phone and the content never touches the practice's records, which is a privacy and record-keeping problem.
What to do when a message is blocked
If a patient says a text never arrived, check the delivery report in your messaging platform before assuming the patient is wrong. Look for an error code, a carrier filter note, or a status such as undelivered. A single failure may be a phone issue, but a pattern across many recipients points to registration or content. Fix the underlying cause, then resend only to people who have not opted out. Keep a short log of incidents and fixes, because it shows regulators and carriers that your practice takes messaging rules seriously.
Who should handle it
This is rarely the best use of a chiropractor's evening. If you use a platform such as PatientCopilot® that includes registration support, the vendor handles the technical steps and you provide accurate business information. If you do it yourself, expect a few rounds of correction.
Next steps
Check your current delivery rate, find out whether your numbers are registered, and review your opt-in language. If you want a second opinion on your setup, or help getting texting running reliably, book a strategy call and we will review your messaging flow with you.
