The honest answer: Outsourcing your ABA billing makes financial sense when your collected revenue per BCBA hour is being suppressed by 4% or more in fixable categories you don’t have time to work. Below that threshold, in-house billing usually wins. Above it, you’re paying yourself to do work an outsourced team can do faster and cleaner.
Here’s how to figure out which side of the line you’re on.
The four signals that say “outsource”
1. Aged AR > 25% of total receivables in the 90+ day bucket
If you pull your AR aging report and more than a quarter of what’s owed is sitting in the 90+ day bucket, your in-house team has run out of capacity to work denials before appeal windows close.
For an ABA practice with $3M annual collections, every 1% leaving the 90+ bucket unworked equals roughly $30K of permanently lost revenue per quarter.
2. 97153 unit-count denials being written off
If your billing team treats 97153 denials for “units exceed authorization” as automatic write-offs instead of working them through cure-and-appeal, you’re losing 3-6% of session revenue that’s usually recoverable. This is the single most common ABA write-off pattern we see — and it doesn’t need to be one.
3. Multi-state operations with credentialing chaos
If you operate across two or more states, multi-payer credentialing complexity expands geometrically with each new location. In-house teams can’t usually keep up with re-credentialing cycles, attestations, and roster updates while also working day-to-day billing.
4. Your BCBAs are doing administrative work
If clinical staff are spending time on prior auth, claim follow-up, or denial troubleshooting, you’re paying clinical wages for administrative output. If a BCBA is spending 4 hours/week on billing-adjacent work, that’s 200 hours/year of clinical capacity you’re trading away.
When in-house wins
Small practices (1-3 providers, < $1M collections): The fixed cost of an outsourced RCM partner usually outweighs the marginal gains at this scale. A part-time biller covers it.
Practices with a billing manager who actually works denials: If your billing manager is pulling EOBs, writing appeals, tracking appeal windows — outsourcing would replace something that’s already working.
Practices in stable single-state Medicaid environments: If your payer mix is 80% one state’s Medicaid program with predictable rules, in-house teams can master the patterns.
What outsourced ABA billing actually costs
Industry pricing typically runs 4-8% of net collections for full-service RCM. For specialty ABA practices, expect 6-8% because the work is more complex than primary care.
A $3M ABA practice paying 6%: Annual RCM cost $180K. Compare to in-house billing manager + biller + benefits + software = $130-180K depending on geography. The financial case for outsourcing isn’t cheaper — it’s better recovery rate. If your in-house operation is collecting 90% NCR and an outsourced partner can hit 95%, the 5% lift on $3M is $150K — usually well above the outsource premium.
The questions to ask any RCM partner you’re evaluating
About their book of business
- “What percentage of your clients are ABA practices?” (You want 25%+ for true specialization)
- “Can you share 2 ABA references at practices similar to ours?” (Decline if they can’t)
- “What states do your existing ABA clients operate in?” (Should overlap with your geography)
About their process
- “Walk me through how a 97153 unit-count denial moves through your workflow.”
- “What’s your average appeal turnaround in days?” (Sub-30 is good, sub-14 is great)
- “Do you work parity-violation appeals on behavioral health claims?” (Yes = sophisticated)
About pricing
- “Is your fee on collected revenue or billed?” (Collected — billed creates wrong incentives)
- “What’s your minimum monthly fee?” (If they have one, ask why)
- “Is there a setup/onboarding fee separate from monthly?”
Red flags in any RCM partner pitch
- They promise specific collection rate improvements before reviewing your data.
- They want a 24-month contract. Specialty RCM should justify itself month-over-month.
- Vague answer on offshore vs onshore staff. The good ones are explicit.
- No clear escalation path for problems. Vague answer means no one owns it.
How Revenant Care approaches ABA billing
We work exclusively with behavioral health, ABA, SUD, and mental health practices — about 70% ABA by volume.
- 97153 unit-count denials: Worked within 5 business days. Cure documentation pulled from session notes, appeal filed if cure path closed.
- 97155 supervision-ratio denials: Cross-checked against BCBA co-sign records and session logs. Most are cured documentation issues.
- Prior auth tracking: Weekly auth-vs-claim reconciliation prevents 80%+ of “outside auth window” denials before submission.
- Multi-state credentialing: Dedicated credentialing analyst per state monitors re-credentialing 90 days ahead.
We offer a free 30-day denial audit — you send 50-100 claims, we work them in 5-7 business days, you get a report on what’s recoverable. No contract. If the numbers don’t justify outsourcing, we’ll tell you.
3-question decision worksheet
- What is your current NCR? Below 92% = outsourcing likely improves. Above 95% = team is already strong.
- What percentage of AR is in the 90+ day bucket? Above 25% = capacity problem. Below 15% = in-house is keeping up.
- What’s your annual collections / total billing FTE? $1M+ per FTE = efficient. Below $800K = outsourcing usually fixes inefficiency.
Ready to find out where you stand?
We run a free 30-day denial audit specifically for ABA practices. You send a sample of claims, we work them in 5-7 business days, you get a breakdown of recoverable revenue by denial category, specific recommendations on workflow leaks, and a no-pitch report — even if you stay in-house, you keep the analysis.
15-minute scope call: Book a time
FAQs
Q: How much does outsourcing ABA billing cost?
A: 4-8% of net collections is the industry range. Specialty ABA typically pays 6-8%.
Q: How long does it take to onboard?
A: Typical onboarding is 30-60 days.
Q: Do outsourced billing companies handle ABA prior authorizations?
A: Yes, full-service RCM partners handle prior auth submissions, tracking, and re-auth cycles.
Q: What’s the difference between billing services and full RCM?
A: Billing services handle claim submission and basic follow-up. Full RCM includes coding review, prior auth, eligibility, denials management, appeals, AR aging, and reporting. ABA practices usually need full RCM because of denial complexity.
Q: How do I know if my current billing is underperforming?
A: Three quick checks: NCR below 92%, AR 90+ bucket above 25%, or write-offs above 8% of total claims. Any one signal warrants a closer look.