Key Takeaways: A single case agreement covers one admission or treatment episode at a negotiated rate. Signing it is roughly the halfway point, because a signed agreement does not guarantee the claim is adjudicated at the agreed rate.
- An SCA covers the episode it was written for, not the patient indefinitely, so a readmission requires a new agreement.
- The rate is one term among several, and an incomplete code list or date range weakens the agreement regardless of the rate.
- Claims routinely process as standard out-of-network because the agreement was never loaded into the adjudication system.
- An underpaid SCA appeal argues breach of an agreed term, which is a stronger position than a medical necessity appeal.
- SCA claims tracked separately from network claims get caught in time, and the ones that are not usually surface after appeal windows narrow.
Contents
Most of what is written about single case agreements stops at the signature. The agreement gets negotiated, both parties sign, and the story ends.
For a behavioral health facility, the signature is roughly the halfway point. What happens to the claims afterward decides whether the agreement was worth negotiating.
A single case agreement (SCA) is a one-time contract between an insurance payer and an out-of-network provider covering one patient’s specific admission or treatment episode at a negotiated rate. It does not cover that patient indefinitely. The agreement typically specifies the rate, the permitted CPT or HCPCS codes, and the date range it covers, and a later admission requires a new agreement.
That last detail, the scope of what the agreement actually specifies, is where most of the downstream problems originate.
Why SCAs are common in behavioral health
SCAs exist because networks have gaps. In behavioral health, those gaps are structural rather than occasional.
Treatment access remains limited across the board. Published analysis in JAMA Health Forum noted that in 2022, 50.6% of adults with any mental health condition and 14.9% of people aged 12 or older with a substance use disorder received treatment. When a plan cannot produce an appropriate in-network option for a patient who needs a specific level of care, an SCA becomes the mechanism that closes the gap.
This is also now explicitly a regulatory question. Under the Mental Health Parity and Addiction Equity Act, as amended by the Consolidated Appropriations Act of 2021, health plans must conduct comparative analyses of nonquantitative treatment limitations. CMS describes these as including standards related to network composition, out-of-network reimbursement rates, and medical management. Final rules were published in September 2024, with provisions phasing in across plan years beginning in 2025 and 2026.
The practical translation for an operator is that network adequacy and out-of-network rate methodology are recognized as parity issues under federal rule, which places them on different footing from ordinary contracting preferences. That context matters when a facility is making the case for why an SCA is warranted.
When SCAs come up
Three situations account for most SCA activity in behavioral health.
- No adequate in-network option for the level of care needed: A patient’s plan has no in-network residential or PHP provider that can meet their clinical needs within a reasonable distance. This is the most common scenario for facilities admitting out-of-state patients, and it is why SCAs come up so often for programs in California and Florida, which draw patients from across the country.
- Specialty treatment the network cannot supply: Eating disorder programs are the clearest example, because specialist scarcity is well documented and the clinical case for a specific program is easier to make. The complexity of eating disorder billing compounds this, since these admissions frequently involve both medical and behavioral components.
- Continuity of care: A patient is mid-treatment when their coverage changes, or their in-network provider becomes unavailable. Some payers handle this through a transition of care agreement, which is a form of SCA covering a defined number of sessions or a defined period while the patient transitions.
The negotiation phase
An SCA negotiation is a clinical argument with a financial outcome. The facility is establishing that this patient needs this level of care and that the plan cannot supply it in network.
The rate is one term among several. A complete agreement specifies:
| Element | Why it matters |
|---|---|
| Reimbursement rate | The obvious one, and the one facilities focus on |
| Permitted codes | Which CPT or HCPCS codes the agreement covers. A per diem code omitted here will not pay |
| Date range | The period the agreement covers. Care delivered outside it is unprotected |
| Level of care | Whether the agreement covers a step-down, or terminates if the patient transitions |
| Authorization terms | Whether continued stay review still applies and on what schedule |
| Claims submission instructions | Where and how to submit so the agreement is applied |
A facility that negotiates hard on rate and accepts vague language on everything else has a weaker agreement than the rate suggests.
Two procedural points carry disproportionate weight. The agreement should be in place before care is delivered, which makes SCAs a front-end problem tied directly to verification of benefits. If eligibility checks flag out-of-network status early, there is time to negotiate. If nobody catches it, the patient is admitted and treated with no contract behind the claim.
And the agreement must be in writing. A verbal confirmation from a plan representative is not an enforceable term when the claim is adjudicated months later by a different department.
Enforcement: where signed agreements still fail
This is the part of the lifecycle that receives the least attention and causes the most loss.
A signed SCA does not automatically govern how a claim is processed. The agreement is negotiated by one part of the payer organization and the claim is adjudicated by another, often through automated systems that read network status rather than contract files. Several failure modes recur:
- The claim processes as standard out-of-network: The adjudication system does not have the agreement on file, or it was loaded against the wrong patient, provider identifier, or date range. The claim pays at the plan’s out-of-network benefit rather than the negotiated rate.
- The claim pays at a “usual and customary” rate: The payer applies its own allowable rather than the agreed rate, sometimes with no indication on the remittance that an agreement exists.
- The agreement is applied to some codes but not others: Where a facility bills multiple codes across an episode, partial application is common, particularly when the agreement’s code list was incomplete at signature.
- The agreement lapses mid-episode: Care continues past the agreement’s date range without an extension being requested, and the tail of the admission reverts to out-of-network processing.
None of this is necessarily deliberate. The result is the same either way: the facility delivered care under a negotiated contract and did not get paid the negotiated amount.
Catching it requires reading the remittance against the agreement rather than against expectation, which is a claims management function rather than a contracting one. The specific check is whether the allowed amount matches the SCA rate for each code and each date of service, which is a different question from whether the claim paid.
Recovery: the underpaid SCA claim
When an SCA claim is underpaid, the facility has a contract. That is a materially stronger position than a standard out-of-network appeal, and it changes what the appeal should argue.
An out-of-network appeal argues medical necessity. An SCA underpayment appeal argues breach of an agreed term. The documentation that supports it is different:
- The executed agreement, with the rate, code list, and date range visible.
- The claim as submitted, showing codes and dates falling inside the agreement.
- The remittance advice showing the amount actually allowed.
- Any authorization or continued stay approvals issued under the agreement.
- Correspondence establishing who agreed to what and when.
Facilities that track SCA claims separately from network claims can assemble this quickly. Facilities that do not often discover the underpayment during a general accounts receivable review, by which point appeal windows may have narrowed.
Timely filing and appeal deadlines apply to SCA claims the same as any other, and they vary by payer and by contract. The agreement itself sometimes specifies a dispute process, which is another reason the written terms matter more than the negotiated rate alone.
Where facilities lose money on SCAs
Most SCA revenue loss traces back to a small number of avoidable decisions.
- Admitting before the agreement is executed: The clinical decision and the financial decision get made on different timelines, and the clinical one usually wins. That is understandable, and it is also how uncontracted admissions happen.
- Accepting verbal terms: A representative’s confirmation over the phone is not a contract term.
- Signing without a complete code list: Per diem codes, ancillary services, and step-down levels of care all need to be named.
- Assuming a returning patient is still covered: An SCA ends with the episode it was written for. A readmission needs its own agreement, negotiated before the patient comes back through the door.
- Not tracking SCA claims separately: An SCA claim paid at the out-of-network rate looks like a normal payment in an aggregate AR report. Without financial reporting that separates them, the underpayment is invisible.
- Writing off the difference: An underpaid SCA claim with a signed agreement behind it is one of the more recoverable items in a behavioral health AR ledger, and it is frequently the one that gets adjusted off because chasing it looks like work.
- Letting the agreement lapse: Extensions have to be requested before expiry, not after.
Each of these is a process gap rather than a negotiation failure, which is why SCA performance tends to correlate with how a facility’s revenue cycle management is structured rather than with how well anyone negotiates.
Final Thoughts
An SCA is a contract your facility negotiated and a payer agreed to. Getting paid the agreed amount should not require chasing.
CodeMax handles SCAs across the full lifecycle: negotiating the agreement, tracking the agreed terms through claim adjudication, and pursuing the difference when a claim is processed at the wrong rate.
If SCA claims are being written off, or nobody is currently checking whether they paid at the agreed rate, that is a recoverable position rather than a lost one.
Talk to CodeMax about SCA management. We negotiate the agreement, track the agreed terms through adjudication, and pursue the difference when a claim is processed at the wrong rate. Call 866-263-3629 or email info@codemaxmb.com.
You can also speak to a specialist about your current SCA volume and how it is being tracked.
Frequently Asked Questions
The terms are often used interchangeably and the mechanics are similar. Both create a one-time exception allowing an out-of-network provider to be treated as in-network for a specific patient. Some payers use distinct terminology and distinct request processes for each, so it is worth confirming which term a given plan uses.
No. An SCA covers the admission or treatment episode it was written for, not the patient on an ongoing basis. A readmission requires a new agreement, negotiated before care resumes. Facilities that treat a prior SCA as standing coverage end up delivering the second episode with no contract behind the claims.
Yes. Patients or their families can contact the plan to request one, and in many cases that is how the process starts. The negotiation of rate and terms happens between the payer and the provider, so a patient-initiated request still requires the facility to engage on the contract.
Traditional Medicare generally does not, since any provider accepting Medicare can treat the patient and network status does not apply the same way. Medicare Advantage plans operate defined networks and do sometimes negotiate them.
No. An SCA covers one patient, one provider, and one treatment episode. It creates no obligation regarding any other member of the plan, and it does not establish a network relationship.
Compare the allowed amount against the agreed rate for each code and each date of service, rather than checking only whether the claim paid. Confirm every code billed appears in the agreement's code list and every date falls inside the agreement's range. Claims processed as standard out-of-network frequently pay something, which is why underpayments pass unnoticed.
Appeal windows vary by payer and by contract, and the agreement itself may specify a dispute process. Because the deadline is contract-dependent rather than standardized, the practical answer is to identify the underpayment quickly, which depends on tracking SCA claims separately from the general AR population.
