How to Choose an ABA Billing Company: 12 Questions to Ask Before You Sign

To choose an ABA billing company, verify three things: that they work ABA exclusively or near-exclusively, that they will commit to first-pass acceptance rate, denial rate, days in A/R, and net collection rate in writing, and that you own your data and can leave without penalty. Everything else is secondary.

Why can't I just hire a general medical billing company?

Because ABA bills differently enough that a generalist learns on your claims, and the tuition comes out of your collections.

ABA runs on time-based units across CPT 97151 through 97158, where a single misapplied credential modifier repeats across an entire caseload before anyone notices. Nearly every service sits behind a prior authorization that expires and exhausts, so tracking remaining units by code is a core function rather than an afterthought. Supervision requirements differ by state, with several setting explicit ratios of supervision hours to technician-delivered hours. And Medicaid, which carries much of the volume in this field, changes rules by provider bulletin rather than by notice, with several states revising ABA coverage, telehealth eligibility, and rate structures during 2026 alone.

A general medical billing company can learn all of that. The question is whether you want to fund the learning curve.

What metrics should an ABA billing company commit to?

Four, and they should appear in your agreement rather than in a sales deck.

First-pass acceptance rate, meaning claims accepted by the payer on first submission. Related to but distinct from clean claim rate, which measures claims clearing pre-submission edits. Ask which one they are quoting, because the numbers differ and the distinction is covered in our post on clean claim rate.

Denial rate. Industry targets generally sit below 5%, with strong performers under 3%, though MGMA benchmarking has found more than half of healthcare organizations exceeding 10%.

Days in accounts receivable. General healthcare guidance targets 30 to 40 days, with MGMA 2024 data putting the median practice at 47 and better performers around 36.

Net collection rate, the share of what you were owed that you actually kept. Benchmarks generally run 95% to 99%, and this is the metric that catches underpayments and abandoned appeals the others miss. Our post on net collection rate explains why.

Ask for these on your account monthly, not as company averages. A blended figure across a book of business tells you nothing about your clinic.

What should I ask an ABA billing company before signing?

Twelve questions, each with a tell in the answer.

Question six separates most vendors. Ask what happens to a CARC 197 authorization denial specifically, and listen for whether the answer involves checking the authorization record and appealing or simply resubmitting and waiting.

What are the red flags?

Five, and any one of them should slow you down.

No ABA-specific references, or references they will not let you call. A refusal to commit to metrics in writing, usually framed as "we don't control collections," which is true and does not explain why they will not report on them. A term longer than a year with limited termination rights. Fees charged against aged A/R they did not generate. And vague ownership language around your data, which only becomes expensive at exactly the moment you have the least leverage.

One more worth naming: a quote meaningfully below the market range with no explanation of what was removed from scope. Published ABA billing pricing generally runs 4% to 8%, and a materially lower number usually means denial work, A/R follow-up, or authorization tracking is not included. Our comparison of in-house versus outsourced billing covers how those pricing tiers break down.

Who owns my data if I leave?

You should, and it should say so in writing, including the format your records come back in and what transition support looks like.

This question gets skipped because it feels like planning for failure. It is the single hardest term to renegotiate later, since by the time you want to leave, your leverage is gone and your open A/R is sitting inside their system. Ask it during the sales conversation, when the answer is cheap.

Related and equally worth settling: who works claims in flight during a transition, and whether there is any fee attached to that.

How do I decide between two companies that look similar?

Compare what they measure and what they will own, since that is where similar-looking vendors diverge.

Ask both to describe, specifically, what they would do in your first 90 days. A strong answer names a baseline, identifies which of your payers carries the most denial risk, and commits to a reporting cadence. A weak answer describes onboarding steps.

Then ask what sits outside billing. A billing company tells you claims were submitted and collected. A finance function tells you what your cost per billable hour is, which payers are actually profitable, and whether your cash position supports the hire you are considering. Our ABA clinic KPI guide covers the numbers that question depends on.

Where to start

If you are comparing companies, start by knowing what your current billing actually collects against what it should, because that number is the benchmark any candidate should be measured against. Our recovery calculator gives a self-serve estimate, and our team will walk your last 90 days of claims.

Frequently asked questions about choosing an ABA billing company

What should I look for in an ABA billing company?

ABA-specific experience in your states and payers, written commitments on first-pass acceptance rate, denial rate, days in A/R, and net collection rate, clear scope including denial appeals and authorization tracking, and data ownership terms that let you leave cleanly.

What is the best ABA billing company for a small clinic?

The one that works ABA exclusively, prices at a percentage of collections without a minimum that penalizes your volume, reports monthly on your account specifically, and does not lock you into a long term. Ask for references from clinics your size in your state.

Should an ABA billing company guarantee results?

They cannot guarantee collections, since payer behavior is outside their control. They should commit to reporting on the four core metrics monthly and to defined service levels on submission timing and denial follow-up.

How do I know if my billing company is underperforming?

Rising denial rate, days in A/R drifting past 50, net collection rate below 90%, and denials being written off rather than appealed. Request the monthly numbers; a company unwilling to produce them is itself the answer.

Is ABA billing really different from general medical billing?

Yes. Time-based units, credential modifiers, authorization-driven delivery, state-specific supervision requirements, and Medicaid rules that change by bulletin make it a distinct specialty.

Learn more about our full-cycle revenue cycle management.