> ## Documentation Index
> Fetch the complete documentation index at: https://dso.getlemma.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Your first patient refund

> A secondary plan pays more than estimated on a pediatric patient. Detect the credit balance, verify whose money it is, refund it by the right method, and record it.

A **credit balance** is money sitting on a patient's account that you are not entitled to keep. It is a liability, not revenue, and in many states refunding it is a legal obligation with a deadline. This tutorial walks one patient refund end to end.

## What happened

Noah, age seven, came in for a recall visit; exam, child prophy, bitewings, fluoride. He's covered under **both parents' plans**, and under the **birthday rule** the primary plan is the one belonging to the parent whose birthday falls earlier in the calendar year (month and day only; the year doesn't matter). Noah's mother's birthday is in March, his father's in August, so her plan is primary.<sup>1</sup>

At check-in, Bluebird estimated Noah's share at **\$\$38** based on the primary plan alone and collected it by card. Then both claims adjudicated: the primary paid its share, and the secondary picked up the entire remaining balance; the secondary pays up to the lesser of its normal benefit or what's left after the primary, and here that covered everything.

Noah's account now shows a \*\*$38 credit**. Bluebird owes his parents $38.

## Step 1: detect it

Credit balances are invisible unless you look. Run the **credit balance report** from your PMS weekly, not monthly.

The common causes:

| Cause                                                                                     | Frequency   |
| ----------------------------------------------------------------------------------------- | ----------- |
| Point-of-care estimate exceeded actual patient responsibility                             | Very common |
| Secondary COB paid more than estimated (children with dual coverage are a common example) | Common      |
| Patient and payer both paid the same balance                                              | Common      |
| Duplicate patient payment                                                                 | Occasional  |
| Payer overpayment or retroactive adjustment                                               | Occasional  |
| Posting error                                                                             | Occasional  |

<Warning>
  **Review aged credit balances promptly.** Unrefunded patient money can become unclaimed property. Payer money may be subject to contractual repayment duties, and identified Medicaid overpayments can trigger the federal 60-day report-and-return rule. Review each balance by source rather than treating the report as an accounting cleanup list.
</Warning>

## Step 2: verify whose money it is

Verify the source before choosing the refund method or adjusting the ledger.

```mermaid theme={null}
graph TB
    A[Credit balance detected] --> B{Whose money?}
    B -->|Patient overpaid| C[Refund the patient]
    B -->|Payer overpaid| D[Refund the payer<br/>60-day rule for Medicaid]
    B -->|Both| E[Split, refund each their share]
    B -->|Posting error| F[Correct the posting<br/>no refund owed]
```

The obligations differ sharply:

* **Patient money** → refund to the patient (for a minor, the paying parent), subject to state refund-timing rules and, if unclaimed, escheatment.
* **Payer money** → refund according to the contract and program rules. For Medicaid payments, whether made directly by the state or through a dental benefit administrator, the **60-day report-and-return rule** applies to identified overpayments.<sup>2</sup> See [Report and return overpayments](/guides/compliance/report-and-return-overpayments).
* **Posting error** → fix the posting. No refund is owed and issuing one creates a second error.

Bluebird's case is patient money: the family paid \$\$38 toward a balance the two plans fully covered. Before refunding it, confirm the COB order. If the *payers* used the wrong order, the credit may later be reversed through a payer recoupment.

## Step 3: refund by the right method

Refund to the **original payment method** wherever possible. It reconciles cleanly, arrives fast, and cannot be lost in the mail.

| Original payment                    | Refund method                                              | Watch out for                                            |
| ----------------------------------- | ---------------------------------------------------------- | -------------------------------------------------------- |
| Card, within the settlement window  | Void or reversal                                           | Fastest and cleanest                                     |
| Card, after settlement              | Refund to the same card                                    | Interchange on the original sale is usually not returned |
| Card, expired or closed             | Mailed check                                               | The card network may still route a refund, try it first  |
| Cash or check                       | Mailed check                                               | Confirm the current mailing address                      |
| Patient has moved or is unreachable | Mailed check to last known address, then escheatment track | Start the uncashed-check clock                           |

Noah's mother paid by card three weeks prior, so Bluebird refunded \$\$38 to the same card. It posted in two business days.

## Step 4: when it has to be a check

Some refunds cannot return through the original payment method because the patient paid cash, the card expired, the account closed, or the family moved. Those refunds may require **paper checks** and a process for address verification, delivery, stale checks, and unclaimed property.

A check-refund process needs check stock, an authorized signature, printing, envelopes, postage, and a way to track stale checks, void-and-reissue requests, and eventual escheatment for checks that are never cashed.

The workload grows with the number of refunds and PCs because each check must be drawn on the proper entity's account and follow its signing controls. Build the process before volume makes the ledger difficult to manage.

<Tip>
  Some healthcare-focused banking platforms will print and mail refund checks from each entity's own account, which removes the check stock, signature workflow, and post office run per PC. Worth evaluating once you're past a handful of entities. The full treatment, including options, is in [Issue a patient refund](/guides/payments/issue-a-patient-refund).
</Tip>

## Step 5: record it

Every refund needs a paper trail:

* Date detected, date issued
* Amount and method
* **Who the money belonged to** and how you determined that, including the COB order you verified
* The claim and date of service it relates to
* Check number or card transaction reference

Post it against the credit balance so the account nets to zero. A refund issued but not posted creates a second credit balance and, eventually, a second refund.

## Deadlines exist

Many states set explicit deadlines for refunding patient overpayments, commonly measured in days from identification, and where no statute exists, dental board guidance or the payer contract often fills the gap. The ranges vary widely by state.

See [Patient refund timing requirements by state](/reference/banking/refund-check-requirements) for the table, and treat it as a starting point to confirm rather than a substitute for checking your own state's current rule.

## When the check is never cashed

Uncashed refund checks do not become your money. They become **unclaimed property**, and after a state-specified dormancy period you owe the state, not the patient.

The pipeline:

1. Check goes stale (commonly 90–180 days per your check stock's terms)
2. Attempt re-contact, the **due diligence letter** most states require
3. If still unclaimed, report and remit to the state at the end of the dormancy period

Keep an **uncashed-check ledger from day one**. Reconstructing it years later across multiple PCs is slow and error-prone. See [Handle uncashed checks and escheatment](/guides/compliance/handle-escheatment) and [Unclaimed property by state](/reference/banking/escheatment-by-state).

## Prevent the next one

Use each refund to check whether the estimate process missed information that was available before treatment:

1. **Capture both plans at verification.** Dual coverage is common on pediatric schedules. If verification records the secondary plan and the COB order, the estimate models both payers instead of stopping at the primary.
2. **Estimate from the verified plan design, not the card.** Remaining maximums, deductible status, and cost-shares come from the 271 and the plan record; the insurance card is frequently stale.
3. **Do not collect an unsupported amount merely to protect against uncertainty.** Use the best verified estimate, explain that final responsibility may change, and bill or refund the difference after adjudication.

## Checklist

* [ ] Credit balance report run weekly
* [ ] Ownership of each credit determined before refunding; COB order verified
* [ ] Payer overpayments routed to the 60-day process, not the patient refund process
* [ ] Refund issued to the original method where possible
* [ ] Refund posted against the credit balance
* [ ] Uncashed-check ledger started
* [ ] State refund deadline confirmed for your state

## Next

<Card title="Your first month-end close" icon="arrow-right" href="/start/first-90-days/first-month-close">
  Two entities, one reconciliation.
</Card>

## Sources

1. ADA, [Dental plans; coordination of benefits](https://www.ada.org/resources/practice/dental-insurance/dental-plans-coordination-of-benefits): the birthday rule governs dependent children with dual coverage (earlier month/day in the calendar year is primary; a court order supersedes; ties go to the longer-held plan).
2. 42 U.S.C. § 1320a-7k(d), enacted by § 6402(a) of the Affordable Care Act, applies to Medicare and Medicaid overpayments. CMS's implementing rule was revised by CMS-4205-F, effective January 1, 2025, aligning the identification standard with the False Claims Act knowledge standard. See Morgan Lewis, [Tick-Tock: CMS Overpayment Refund Final Rule and Practical Implications](https://www.morganlewis.com/pubs/2024/12/tick-tock-cms-overpayment-refund-final-rule-and-practical-implications).