To manage open claims and denials after selling an ABA practice, create a service-level inventory that ties every balance to the billing entity, rendering provider, location, payer, authorization, service date, submission history, payment destination, deadline, record source, and person authorized to act. Use the purchase agreement and payer-specific written instructions to separate retained from assumed work, while preserving clinical records, portal access, refunds, appeals, and cash reconciliation. Keep the queue open until each item is paid, adjusted, appealed, refunded, transferred through an allowed process, or deliberately closed with evidence.

The sale may close while the revenue cycle stays busy

A closing date is wonderfully tidy on a transaction calendar. Claims are not. Services delivered before closing may still be unbilled, rejected, pending, under review, partially paid, offset, appealed, or waiting on clinical documentation long after the keys change hands. Families may also have balances, refunds, or coordination-of-benefits questions that cross the same date.

That is why learning how to manage open claims and denials after selling an ABA practice begins with a sober observation: the accounts receivable did not become simpler merely because the business changed hands. A good plan gives every old service a lawful owner, a workable route, and enough context to finish the work without confusing the buyer's new activity with the seller's remaining obligations.

Start with the person, entity, place, service, and date

Build the inventory at the level that payers and records actually recognize. Include client or account reference, date of service, code, units, rendering professional, supervising professional when relevant, billing entity, tax ID, organizational and individual NPI, location, payer and product, authorization, original submission, current status, billed amount, allowed amount, paid amount, patient responsibility, adjustment reason, appeal limit, and supporting record location.

CMS explains on its NPI page that an NPI is an identifier, not a license, credential, or promise of reimbursement. A familiar number is not enough to decide who may bill or appeal. Preserve the whole identity chain, including the legal entity and service date, so a buyer's current enrollment is not mistaken for the seller's historical claim authority.

Translate the deal documents into a work map

The purchase agreement should tell the parties which receivables, cash, liabilities, refunds, and cooperation duties were retained or assumed. It may define post-close access, expense sharing, collections, offsets, reporting, control of appeals, and what happens when one party receives money that belongs to the other. Transaction counsel should interpret those terms; the revenue-cycle team should turn them into actual work.

For every queue, record the economic party, the party allowed to communicate with the payer, the operator doing the work, the bank destination, the evidence each party receives, and the dispute route. Those roles can differ. A buyer may provide transition services without owning the receivable, while a seller may own the balance but need buyer-held records. Avoid a single ambiguous column called “owner.”

Payer instructions can override an elegant internal plan

Private plans, managed-care organizations, state Medicaid programs, and federal programs use different portals, forms, filing limits, representation rules, and ownership-change processes. CMS's current provider and supplier guidance and enrollment-application page offer useful federal orientation. Its Medicaid provider-requirements page points to state program-integrity and provider-management resources.

None of those pages creates one post-sale ABA claim route. Ask each payer, in writing where possible, which entity may submit a corrected claim, receive remittance, request reconsideration, respond to a record request, or return a payment for the relevant service date. Store the answer beside the claim population instead of relying on what a portal still happens to permit.

Separate claim states before anyone starts calling

An unsubmitted claim is not a denial. A front-end rejection is not necessarily an adjudicated denial. A request for information is not an appeal decision. A recoupment, refund request, offset, underpayment, and patient balance each call for different evidence and authority. Give the transition team a shared state vocabulary and preserve the payer's own code and text.

This is not clerical fussiness. If a rejected batch is sent down an appeal lane, a filing window may expire while the team waits for a decision that will never arrive. If an adverse decision is treated as a correctable rejection, the practice may resubmit identical information and lose time. Review the specific payer agreement, manual, remittance, notice, and current route before choosing the next action.

Protect filing limits and the story behind each deadline

Build a deadline view from the actual plan documents and notices: initial filing, corrected-claim, reconsideration, appeal, record-response, refund, and dispute dates. Record how each date was calculated, which event starts it, and the source. A generic 90-day field is dangerous when one product counts from service, another from remittance, and a third allows a contractual exception.

CMS's Medicare redetermination form illustrates that a federal appeal route can require the determination, reason, evidence, and timing to travel together. It does not govern every ABA payer. Have a qualified revenue-cycle or legal reviewer confirm uncertain deadlines, and escalate close dates early enough for the party with authority to act.

Clinical support should be requested, not reverse-engineered

Some denials need a note, assessment, plan, authorization, credential record, supervision evidence, or explanation from a qualified clinician. Keep the request narrow: identify the service, payer question, missing or disputed element, deadline, and authorized reviewer. Do not ask clinicians to rewrite history, change a treatment judgment for payment, or sign a record they did not create or supervise.

The BACB Ethics Code applies to certificants within its scope, and the CASP organizational-guidelines overview provides a public cross-functional frame. Neither source proves medical necessity, fixes a claim, or transfers clinical authority. Corrections, addenda, and late entries should remain truthful, attributable, dated, and consistent with professional, payer, and record rules.

Keep PHI available without leaving every door open

A seller may need records held in a buyer-controlled system, while the buyer may be doing limited work for the seller. Document the permitted purpose, people, data, duration, safeguards, logging, request route, and termination event. HHS's business-associate contract provisions describe written safeguards and termination duties for relationships within their scope.

HHS also explains in its PHI availability FAQ that a business associate must maintain availability and cannot simply block the covered entity from information maintained on its behalf. That principle is not permission for perpetual seller access. Use role-based access, supervised retrieval, bounded exports, or a request service that matches the parties' actual legal roles.

Treat payments, offsets, and refunds as a daily reconciliation

List every bank account, lockbox, electronic remittance route, virtual card, paper check address, patient-payment channel, and payer offset path that can receive or reduce money. Reconcile cash to the claim inventory daily or on an agreed cadence. When the wrong party receives funds, follow the agreement and payer instructions rather than silently moving cash with a spreadsheet note.

Overpayments need their own route. CMS's self-identified Medicare overpayment fact sheet describes reporting and return duties for Medicare Parts A and B within its scope. It does not impose the same rule on every commercial or Medicaid balance. Keep refunds, offsets, contested amounts, and ordinary payment reversals distinct and involve compliance counsel when the governing obligation is uncertain.

Family balances deserve the same care. Preserve the original statement, payer adjudication, payments, credits, financial arrangements, and communication history. Decide which entity may issue a corrected statement or refund, and give families a contact who can explain the answer without discussing the transaction's confidential terms. A small balance can carry a large trust cost when two companies send conflicting notices.

A fictional claim queue shows why averages conceal risk

Copper Reed ABA is fictional. At closing, its dashboard shows 240 open claims and a reassuring average age. A service-level review finds three very different groups: rejected claims with a payer-ID mismatch, pending claims awaiting no action, and denials with appeal dates inside two weeks. The buyer can see current charts, but only the seller is recognized for several historical payer communications.

The parties create a narrow seller work role, attach supporting records through a logged request, separate rejected from denied claims, and reconcile payments by service date and entity. The example does not promise collection or decide the contract. It shows why a single aging total can hide both harmless waiting and irreversible deadlines.

Close the queue with evidence, not fatigue

Set a regular review cadence and define what counts as a final state. Paid should mean the remittance and bank receipt agree. Adjusted should retain the reason and approval. Appealed should show the submission, evidence, deadline, and next date. Written off should identify authority and accounting treatment. Refunded should connect the notice, amount, method, and confirmation. Transferred should cite the payer-approved route rather than a private handoff alone.

The durable result of how to manage open claims and denials after selling an ABA practice is a reconciled claim register, deadline calendar, access route, clinical-support process, cash and refund ledger, escalation map, and evidence archive. Keep named contacts alive until the last unresolved population has a defensible disposition.

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