Single Case Agreement Billing: How to Submit Claims and Avoid Payment Delays

Single case agreement billing trips up even experienced billing teams because it doesn't follow the same automatic processing path as regular in-network claims. One wrong field, one missing reference number and your payment sits in limbo for months. This guide walks you through exactly how to submit SCA claims, what causes delays, and how to get paid faster.

If you're still in the approval stage, start with our guide on what is a single case agreement 

How Single Case Agreement Billing Differs from In-Network Claims

When you bill as an in-network provider, claims run through automated adjudication systems. The payer's software checks your NPI, verifies the fee schedule, and processes payment within 14 to 21 days.

SCA claims don't get that treatment. They require manual review because the payer needs to pull up the specific agreement, confirm the service dates fall within the SCA window, and verify that the billed rates match what was negotiated. This manual step is why SCA reimbursement takes 45 to 90 days on average.

The billing process itself uses the same CMS-1500 claim form and standard CPT, HCPCS and ICD-10 codes. The difference is in the details you attach to the claim, not the format.

Required Information on Every SCA Claim

Missing even one piece of information can bounce your claim back to the bottom of the processing queue. Here's what every single case agreement claim needs:

The SCA authorization number must appear on the claim. Some payers want it in Box 23 of the CMS-1500. Others require it as an attachment. Check your agreement terms to confirm.

The rendering provider's NPI must match the name on the SCA exactly. If the agreement is under a group NPI but the rendering provider bills under an individual NPI (or vice versa), the claim will reject. This is one of the most common errors in single case agreement in medical billing, and it's entirely preventable.

Service dates must fall within the SCA's effective period. Bill for a session one day outside the agreement window, and the payer treats it as a standard out-of-network claim.

CPT codes and rates should match the negotiated terms. If your SCA covers 97153 at $55 per unit, don't bill at your standard out-of-network rate. The payer will either deny the claim or reprocess it at a lower amount, adding weeks to your payment timeline.

For providers working with Medicaid managed care plans, a single case agreement Medicaid claim typically follows the state's standard fee schedule unless you negotiated different terms during the SCA process.

Common SCA Billing Errors That Delay Payment

Three mistakes cause the majority of SCA billing delays.

Wrong NPI or Provider Name on SCA Claims

The name and NPI on the claim must match the SCA exactly. If your credentialing paperwork lists your legal entity name but the SCA was issued under your DBA, the payer's system won't connect the two. Confirm the exact provider name and NPI listed on your signed agreement before submitting the first claim. If you're still working through provider credentialing, make sure the SCA reflects whichever NPI is fully active.

Missing SCA Reference on Submitted Claims

Without the authorization number, the claims department processes your submission as a regular out-of-network claim. That means lower reimbursement (or outright denial) and a lengthy appeals process to correct it.

Submit a copy of your signed SCA with the very first claim. Include a cover letter referencing the agreement number and approval date.

Billing Outside the Agreement Window

SCAs have firm start and end dates. If you need to continue services beyond the original term, start the renewal process at least 30 days before expiration. Gaps in coverage mean gaps in payment.

How to Track SCA Payments and Reduce AR Days

Once claims go out, don't wait and hope. Active follow-up separates practices that get paid in 45 days from those stuck at 90 or longer.

Call the payer's provider services line after 21 days if you haven't received an ERA or EOB. Ask specifically about the SCA claim, reference the authorization number, and document who you spoke with. If your accounts receivable in medical billing are climbing past 45 days on SCA claims, that's a sign your follow-up process needs tightening.

Track each SCA in a simple spreadsheet: patient name, payer, authorization number, effective dates, submitted claim dates, and payment status. This sounds basic, but most practices that struggle with SCA reimbursement don't have this information in one place.

Appealing Underpaid or Denied SCA Claims

If a payer reimburses below the negotiated rate or denies the claim entirely, file an appeal with a copy of the signed SCA attached. Reference the specific rate and CPT codes outlined in the agreement.

For denials related to authorization issues, your denial management services workflow should flag these within 48 hours of receiving the EOB. The faster you appeal, the faster the payer reprocesses.

Payers occasionally "lose" SCA documentation in their systems. If a rep says they can't locate the agreement, resend the signed copy and request a written confirmation that it's been added to the patient's file.

SCA Billing Best Practices for ABA Therapy Providers

ABA clinics deal with SCA billing more than most specialties because network gaps in behavioral health are widespread. A few habits make a real difference:

Keep a master file for each SCA with every piece of correspondence, the signed agreement, and all submitted claims. Build SCA billing checks into your standard workflow so nothing slips through.

If SCA billing is eating into your clinical hours, consider working with a team that specializes in ABA therapy billing services. Offloading the follow-up and appeals process frees your staff to focus on patient care.

And if you haven't already, read through the full process for getting your single case agreement approved so your next SCA starts on solid footing from day one.

FAQs

How long does it take to get a single case agreement claim paid?

Most SCA claims take 45 to 90 days for payment because they require manual review by the payer. Standard in-network claims process in 14 to 21 days through automated systems. You can speed up SCA payment by including the authorization number on every claim and following up after 21 days.

What is a single case agreement in medical billing?

A single case agreement in medical billing is a temporary contract between an out-of-network provider and an insurance company that allows the provider to bill at negotiated rates for a specific patient. The provider submits claims on a standard CMS-1500 form with the SCA authorization number attached.

Do I need a single case agreement form or template to bill correctly?

Most payers don't provide a standard single case agreement template. The signed SCA document itself serves as your billing authorization. What matters is that the agreement clearly states the CPT codes, reimbursement rates, effective dates, and the provider NPI, because those details must match every claim you submit.