What Is AR in ABA Billing? A Simple Guide for BCBAs
In this guide · 7 sections
Accounts receivable, or AR, is the practice’s recorded outstanding balance. A billed charge is not necessarily the amount a payer owes or the amount the clinic will collect. Contract adjustments, adjudication, cost share, denials, and record support can change the balance.
The first useful question is which balances need action, by whom, and before which deadline. A large total alone cannot answer it.
Start with a consistent report
- 1Confirm whether aging starts from the service date, claim date, or another system date.
- 2Separate billed charges, expected allowed amounts, payer balances, and patient balances.
- 3Reconcile posted payments and adjustments before treating the total as current.
- 4Group open balances by payer, age, status, last action, and remaining deadline.
The stable billing service stage describes the weekly operating view. Your accounting and billing records should use agreed definitions so totals can be compared across weeks.
Use aging buckets as work queues
A report may use 0–30, 31–60, 61–90, and 90+ day buckets. Those are report categories, not proof of collectibility. An older claim can still have a supported next step; a newer claim can already face a short filing or appeal deadline.
No universal ABA target for days in AR or percentage over 90 days is supplied here. Set internal targets using your payer mix, contractual terms, volume, and starting records.
Read the payer response
The X12 adjustment reason-code list helps interpret an adjudicated adjustment. Read it with the group and remark codes, claim history, and payer instructions. A rejection, denial, underpayment, and unanswered claim need different actions.
For repeated denials, use the denial work-list guide. For an approval mismatch, use the prior-authorization checklist.
Prioritize by evidence and deadline
Sort urgent filing or appeal deadlines first, then review supported balances by amount, age, payer response, and last action. A large balance with missing records may need a clinic decision before a payer follow-up can help.
For each priority item, record the current evidence, owner, next action, and review date. Keep unresolved questions visible. Do not mark a balance recoverable solely because a service happened.
Keep growth and paid-claim reviews separate
New providers can introduce enrollment or group-link issues. Check the BCBA and RBT readiness guide. A paid Medicaid claim also needs adequate supporting records; use the Medicaid chart self-check for that separate control.
What the owner should see each week
- Opening and closing balances using the same report definition
- Payments, adjustments, new charges, and balances moved between categories
- Priority payer responses and deadlines
- Claims with no recent documented action
- Decisions that require clinic records or approval
- Named owners and the next review date
If your report cannot show that view, book a free billing review. Bring the report structure or a workflow question without patient information.
Sources and scope
Primary source checked October 14, 2026: X12 claim adjustment reason-code list, used for remittance interpretation. The work-list method is an operating recommendation, not an industry benchmark. Check payer contracts and current state and product rules before acting.
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