Most ABA agencies grow the same way: a few referral sources send most of the intakes, and when one of them goes quiet the schedule has holes in it. The fix is rarely a bigger marketing budget. It is usually a wider, better-maintained set of referral relationships.
This is a practical walkthrough of where ABA referrals actually come from, and what to do about each one.
Where ABA referrals come from
Four sources produce almost all of the volume.
Pediatricians and primary care. The largest single group. A pediatrician is usually the first professional a parent raises a concern with, and they are the ones who make the diagnostic referral. They are also the least reliably connected to ABA providers, which is the opening.
Diagnosing clinicians. Developmental-behavioral pediatricians, pediatric neurologists, and psychologists who perform the evaluation. Lower volume per practice than primary care, but far higher intent: a family leaving that appointment has a diagnosis in hand and needs somewhere to go.
Schools and early intervention. School psychologists, special education coordinators, and EI service coordinators. Slower to build, but durable, and they see the same families for years.
Adjacent therapy practices. Speech, occupational therapy, and pediatric PT. They serve overlapping caseloads, and referrals here tend to be reciprocal, which makes them the easiest relationships to start.
Why the pediatrician has a problem you can solve
It is tempting to think of referral outreach as asking for a favor. The research says otherwise.
A 2023 study in Pediatrics interviewed pediatricians about the moment after they identify a developmental concern. The theme the authors named was provider disempowerment: clinicians diagnose, then have nowhere reliable to send the family, and hear nothing back afterward. Other work describes the family's experience of the same gap as a labyrinth.
The numbers behind that are stark. Roughly half of US counties have no board certified behavior analyst at all. Waitlists commonly run six to eighteen months. In caregiver surveys, waitlist length is the most-cited reason a child never starts ABA at all.
So a pediatrician who learns there is a local agency with actual openings that takes their families' insurance is not being sold to. They are being handed the answer to the part of their job they like least.
That reframing changes what you send.
Why cold email alone underperforms
Provider outreach is the standard growth channel in every ABA playbook, and email is the standard way to do it. It is also the weakest form of it, for three concrete reasons.
Physician inboxes are saturated. Clinicians receive a high volume of vendor mail and triage it aggressively. A message that opens by introducing your agency reads as one more vendor.
The front desk is the real gatekeeper. Practice managers and intake coordinators decide what reaches the clinician and what gets filed. Writing exclusively to the physician means writing to someone who may never see it.
A large share of referrals still move on paper. Industry estimates put more than half of formal referrals on fax. If the only way to act on your message is to reply to an email, you have excluded the workflow the practice actually uses.
None of that means email does not work. It means email without something useful attached does not work.
What to send instead
The version of this channel that converts is a practice-useful sheet, not an introduction. Four questions decide whether your message gets kept or deleted, and they are the four a front desk asks before sending anyone anywhere.
- Which insurance do you take? Name the plans. This is the first question every intake conversation reaches, and a vague answer is treated as a no.
- What ages do you serve? A specific range. "Pediatric" is not a range.
- Do you have openings right now? A real number and a real date. This is the single most valuable line on the page, because it is the one thing your competitors' glossy brochures never say.
- How exactly does someone refer? The fax number, the intake email, the phone line, and what happens after. If you confirm receipt within one business day, say so.
Put those four answers on one page. Send that page. Let the email body be short and let the sheet do the work.
Cadence beats intensity
One email to two hundred practices produces very little. Four touches to forty practices over a quarter produces relationships.
A workable rhythm:
- Initial contact with the one-pager.
- A short follow-up about two weeks later if there is no reply, restating the ask in one sentence and making it trivially easy to opt out.
- A quarterly capacity update, which is the highest-value message you can send and the easiest to write. It is one line: here is what we have open this quarter.
- A note when something material changes: a new clinician, a new location closer to their patients, a new insurance panel, an expanded age range.
Address the practice manager as well as the clinician. Ask the front desk who handles referral information and send it to that person by name.
The line you cannot cross
There is one hard rule in healthcare referral marketing, and it is not a soft one.
Never pay, reward, or give anything of value to a referral source. Not a fee, not a percentage, not a gift card, not a "thank you" dinner tied to volume. Paying for healthcare referrals is a federal crime under the Anti-Kickback Statute, and most states have all-payer laws that reach private insurance as well. Every ABA enforcement case on record involves someone actually paying someone.
Marketing is lawful. A 2025 Seventh Circuit decision confirmed that marketing which does not exert influence over clinical decision-making is not a kickback. An introduction transfers nothing of value. A payment does. The distinction is the whole ballgame, and it is not a gray area worth exploring.
Two more rules with real teeth:
- CAN-SPAM. Every commercial email needs a truthful subject line, your practice's physical postal address, and a working opt-out that you honor. Penalties run per email, which makes a bulk send an expensive place to be sloppy.
- Fake reply subject lines. Do not open with "Re:" on a first contact. State email statutes specifically penalize subject lines that misrepresent the message, and this is the textbook example.
Building the list
You do not need a data vendor to start. Every clinician in the country is in the NPPES registry, the federal NPI database, which is public and free. It is searchable by taxonomy code, city, and postal code, which is enough to produce a list of every pediatrician, psychologist, and therapy practice within a radius of your clinic.
The work after that is the tedious part: deduplicating practices, finding current contact addresses, tracking who you contacted and when, and keeping the whole thing from going stale. That is a spreadsheet problem for about a month and a real problem after that.
Quemra exists to collapse that step. Run a search on your ZIP code and you will see the referral map around your clinic in about thirty seconds, free, no card.
But the list is the easy half. The half that fills a caseload is sending something a front desk wants to keep.