✳ PRACTICAL GUIDE

How to review a possible underpayment

Establish the expected amount, verify payment history and record follow-up separately from additional money received.

By DueMD3 min read

Start by establishing the expected amount and matching it to payment records. Then decide whether there is a supported difference to pursue. Keep the finding, follow-up action and any additional payment as separate stages of the review.

Four review stages: compare inputs, validate terms, take an appropriate action and reconcile actual payment evidence.
A reproducible review needs evidence at every step. Closing a task does not prove that money arrived.

Build an independent expectation

Establish the agreement, product, provider or entity, service date, rate source and relevant exceptions. Compare the expected allowance with the reported allowance before looking at the payment. A matching allowance and a smaller payment may be explained by responsibility allocation rather than a rate error.

When an expectation cannot be established, retain the case in an evidence-needed group. Do not use an average price from another payer as if it were the contract rate. CMS reference rates are useful reference information, not automatic commercial payment obligations.

Validate the observed payment

Read the payment explanation and identify which money belongs to the scope under review. CMS describes remittance adjustment information; the payment and remittance transaction guidance helps separate a calculation from a funds movement.

Partial payments, supplemental payments and reversals must not be counted twice. A corrected allowance may leave a cash question unresolved. Keep the ledger and bank reconciliation in the authorized environment.

Choose the next action deliberately

A verified difference may need clarification, a corrected submission, a formal dispute or another contract-specific process. Check the correct route and deadlines rather than assuming one universal appeal method. Original Medicare has its own appeals process; that source does not set the rule for every commercial agreement.

Group issues only when they share verified scope and evidence. A repeated-looking payment pattern is not proof that all affected services share the same root cause.

Close on evidence, not activity

Marking a task complete is not recovering cash. Record the submitted amount, acknowledged correction, additional payment and any reversal as separate events. Record the observation period as well.

When reporting outcomes, do not add the original suspected amount to the recovered amount. They are stages of the same opportunity, not separate gains.

Follow one difference through the review

Illustrative example.

StageExample valueRequired evidence
Possible difference$740Arithmetic and an assumed allowance
Validated difference$740Reviewed applicable terms and allocations
Action submitted$740Record of the chosen recovery request
Additional payment received$600Matched payment evidence
Open difference$140$740 − $600, subject to any later change

The $600 receipt reduces the open difference from $740 to $140. It is not a separate gain to add to the initial $740.

Avoid double-counting the outcome

  • Calling a calculator total recoverable cash.
  • Mixing old and new payment snapshots.
  • Treating a similar-rate pattern as a proven configuration error.
  • Reporting submitted appeals as recovered revenue.

Before submitting a recovery request

  1. Validate scope and the expectation source.
  2. Reconcile allocations and payment evidence.
  3. Choose the appropriate action with its actual deadline.
  4. Track net additional receipts separately from work completed.
NEXT STEP

Start with one comparison

Use the reviewed allowance and allocation to check one payer’s recorded payments.

Check payer payments →

Keep reading

Reimbursement, step by step

Sources

Apply the agreement and records relevant to your review. Examples explain the method; they do not determine a payment obligation.

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