If your clinic texts patients or leads from a business phone number in the United States, the carriers expect that number to be registered under a program called A2P 10DLC. Unregistered traffic gets filtered, delayed or blocked outright, and the fines for non-compliant messaging are real. This guide covers what A2P 10DLC is, what a clinic needs to register, and the opt-in and content rules that keep your messages delivered.
Key takeaway: Before a clinic texts patients, its number must be registered through A2P 10DLC. Registering your brand and use case correctly, collecting clear consent and keeping messages compliant prevents blocked texts and delays.
What A2P 10DLC actually is
A2P stands for application-to-person: messages sent from software (a CRM, a booking system, an automation platform) rather than typed by a person on a handset. 10DLC means 10-digit long code, a standard local phone number. Since 2023, the major U.S. carriers require any business sending A2P messages from a local number to register the business (the “brand”) and the purpose of the messaging (the “campaign”) through The Campaign Registry.
For a chiropractic, wellness or med spa practice, that covers almost everything you send: appointment reminders, lead follow-up, review requests, promotions and two-way conversations from a shared inbox. If you use GoHighLevel, Twilio, or any platform built on them, registration happens inside that platform.
What you need to register
Registration has two parts. Have these ready before you start, because mismatches are the most common reason for rejections.
- Brand registration. Legal business name exactly as it appears on your IRS paperwork, EIN, business address, website and a contact person. The legal name and EIN must match IRS records; a DBA in the wrong field will get rejected.
- Campaign registration. A description of what you send and to whom, sample messages, how people opt in, and confirmation that opt-out and help keywords are handled. For clinics the use case is usually “mixed” or “customer care” plus “marketing.”
Approval typically takes a few business days for a standard brand, longer if the vetting service flags a mismatch. Sole proprietors without an EIN have a separate, lower-volume path.
Opt-in: the part most clinics get wrong
Carriers care most about consent. Every number you text needs a documented opt-in that matches what you told them in the campaign registration. In practice that means:
- Web forms need clear consent language at the point of submission, for example: “By submitting this form you agree to receive text messages from [Clinic] about your appointment and related offers. Message and data rates may apply. Reply STOP to opt out.” An unchecked checkbox is the safest version for marketing messages.
- Paper intake forms need the same language and a signature or initials if you plan to text existing patients.
- Verbal consent at the front desk should be logged in the CRM with a date.
- Your privacy policy and terms should describe the texting program, and your landing pages should link to them. Vetting services check for this.
Consent for appointment reminders does not automatically cover promotional texts. If your reminders and your promotions come from the same number, your opt-in language needs to cover both.
Content rules that affect delivery
- Every marketing message should identify the sender and include opt-out instructions, at least in the first message of a conversation.
- Handle STOP, UNSUBSCRIBE and HELP automatically. Most platforms do this by default; confirm it is turned on.
- Avoid public link shorteners (bit.ly and similar). Carriers treat them as a spam signal. Use your own domain or the platform’s branded shortener.
- Send during reasonable hours in the recipient’s time zone. Quiet-hours rules vary by state, and several states restrict marketing texts outside roughly 8am to 9pm.
- Keep messages consistent with what you registered. A campaign registered for appointment reminders that suddenly sends flash-sale blasts is a filtering risk.
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Healthcare-specific considerations
Text messages are not a secure channel. Keep clinical details, diagnoses and anything that would count as protected health information out of texts unless you have a compliant, consented channel for it. “Your appointment is Tuesday at 3pm” is fine. “Your MRI shows a herniated disc” is not. Marketing messages should describe offers and services in general terms and avoid outcome promises.
If your practice is a HIPAA covered entity, confirm that your messaging platform will sign a business associate agreement, and configure the platform so staff cannot paste clinical notes into the inbox by accident.
A simple compliance checklist for clinics
- Brand and campaign registered and approved through your messaging platform.
- Consent language on every web form, intake form and landing page, matching the registered use case.
- Privacy policy and terms updated to describe the texting program, linked from every form.
- STOP and HELP handling confirmed in the platform.
- Business hours sending windows set in your automations.
- No public link shorteners in templates.
- No clinical information in message templates.
- A monthly check of delivery rates and opt-out rates in the platform.
Frequently asked questions
Do I need A2P 10DLC registration if I only send appointment reminders?
Yes. Any message sent from software through a U.S. local number is application-to-person traffic and needs to be registered. Reminders are one of the easiest campaigns to get approved.
How long does A2P registration take?
Brand approval is often same day to a few business days. Campaign approval can take a few more days, longer if the vetting service flags a mismatch between your legal name, EIN and website.
Can I text patients from my personal cell phone instead?
You can, but you lose automation, shared visibility, records of consent and the ability to scale. Most clinics move to a registered business number so the front desk can manage conversations in one inbox.
What happens if I send without registering?
Carriers filter or block unregistered A2P traffic, and repeat violations can lead to the number being suspended and per-message penalties. In practice the first symptom is that your texts quietly stop arriving.
We handle A2P registration, consent language and follow-up automation as part of our email and text marketing setup for every clinic we work with. If you are not sure whether your current setup is registered correctly, request a free analysis and we will check.
