Built by operators who ran ABA billing.

Stop paying a percentage to collect what you earned.

Wilma® is billing software with full in-house RCM — not an outsourced billing service. Run insurance capture, scrubbing, EDI, ERA posting, denial routing, and live AR yourself, and keep your collections.

not an outsourced service

In-house RCM

of collections taken

scrubbing every claim

Pre-submit

AR & ERA posting

Live

Billing service vs. in-house RCM

Wilma® is billing software with in-house RCM — not an outsourced billing service.

Many practices searching for ABA billing services want someone to take the billing off their plate. There are two ways to do that. One is to hand it to an outsourced billing company that runs your claims and charges a percentage of everything they collect — often 4 to 8 percent, forever, growing as you grow. The other is in-house RCM: your own team runs the full revenue cycle inside software built for it, and you keep your collections.

Wilma is the second. She encodes the work a good billing service would do — insurance capture at intake, authorization tracking, pre-submission scrubbing, EDI submission, ERA posting, denial routing with root-cause categorization, and live AR dashboards — so a small front office can run clean billing in-house. You get the discipline of a billing team without paying a percentage of every claim to one.

Coverage and authorization handled at intake — by your team, in your system.

Insurance is captured at intake and authorization units are tracked from the first session. Because this lives in your own system, there is no handoff to an outside billing company and no waiting on someone else’s queue. Your front office owns the front door.

Intake-time insurance capture

Plan and member details captured on the record at intake.

Authorization tracking

Unit balance live, with alerts weeks ahead of renewal cycles.

Payer-specific rules

Medicaid, commercial, TPA — each rule set encoded natively.

No external handoff

Your team owns intake instead of a third-party billing vendor.

Every claim scrubbed before it ships — the way a good billing service would.

With the AI add-on (+$20/user/mo, layered on Core), every claim runs through payer-specific scrubbing before it leaves: modifier sets, authorization units, documentation completeness, medical-necessity language. You get the catch-before-it-ships discipline of an experienced billing team, without paying a percentage of every claim to one.

Per-payer rule engine

Modifier logic and documentation requirements by payer.

Documentation gap detection

Missing signatures, incomplete notes, absent language flagged pre-claim.

Authorization match

Units, dates, and service codes checked against the active auth.

Billing queue, not a spreadsheet

Gaps routed to the right biller with context to fix in minutes.

Submission and reconciliation, automatic and in-house.

EDI clearinghouse integration handles submission. Electronic Remittance Advice posts to the right claim automatically. The reconciliation work a billing service would charge you for happens on its own, on your own record.

EDI clearinghouse integration

Standard 837/835 flows, status tracked end to end.

ERA auto-posting

Payments applied to claims live; reconciliation is a dashboard, not a job.

One record

Submission, remittance, and posting on the same claim.

Patient billing

Statements, payment plans, and online payment, all native.

Denials routed and root-caused — so the next claim ships clean.

When a denial comes back, it is routed to the right person with context and categorized by root cause: coding, authorization, or documentation. You see the pattern and fix it upstream, instead of paying a service per touch to rework claims one at a time.

Routed with context

Each denial sent to the right team member with the claim history.

Root-cause categories

Coding, authorization, and documentation issues classified automatically.

Fix upstream

Patterns surfaced so the next claim ships clean.

Owned in-house

Your team works denials in your system, not an outside vendor’s.

Live AR and financial dashboards — the visibility a service rarely gives you.

Clean claim rate, days in AR, denial reasons, and payer mix, all live and in one place. With in-house RCM you see your own numbers in real time instead of waiting on a monthly report from an outside biller.

Clean claim rate

First-pass acceptance across payers, tracked continuously.

Days in AR

Aging buckets, payer-specific trends, collection velocity.

Denial root cause

Coding, authorization, and documentation issues categorized.

Your numbers, live

Real-time financial visibility, not a monthly service report.

Buyer's Checklist

Comparing billing services to in-house RCM? Demand every line.

FAQ

Questions operators ask about ABA billing services.

Does Wilma offer ABA billing services?

What is the difference between a billing service and in-house RCM?

How does Wilma help me bill in-house without a service?

Does Wilma submit appeals on denied claims?

How much does Wilma cost compared to a billing service?

Can I migrate my open claims from a billing service?

Customer Story · Billing & RCM

How a practice recovered written-off revenue — and stopped paying a cut of every dollar

Why they brought billing in-house instead of surrendering a percentage of every collection.

See in-house RCM that keeps your collections.

Thirty minutes. Bring your current billing-service percentage and a recent denial — we’ll show what running it in-house would look like.

Keep reading

Related guides on running an ABA practice — the same operation, from a different angle.

• Bring ABA billing in-houseUnit maths, modifier rules, scrubbing before submission, and denials you can count.
• ABA billing softwareCPT 97151–97158, pre-submission claim scrubbing, and a denial workflow that closes the loop.
• ABA revenue cycle managementAuthorization through ERA posting, tracked as one cycle instead of four disconnected steps.
• Best ABA practice management softwareThe main platforms compared on scope, pricing model and who each one fits.
• ABA scheduling softwareAuthorization-aware scheduling that respects credentials, drive time and cancellations.
• ABA practice management softwareOne platform for the whole ABA practice, from first call to paid claim.