UB04 Field 54: Prior Payments

Overview

Field 54 (Prior Payments) on the UB-04 claim form captures amounts already received by the provider from a specific payer toward the current bill. According to the Maryland Medicaid UB-04 billing instructions, this field is situational and should be used only when the indicated payer has made a payment to the provider for the services on the claim. ^[1] The provider must enter the exact dollar amount received to date from that health plan. Importantly, the instructions explicitly state: “DO NOT REPORT MEDICARE PRIOR PAYMENTS IN THIS FIELD.” ^[1] This field is part of a payer‑specific block (a, b, c) that aligns with the payer identified in the corresponding loop of the claim. The purpose is to inform the current payer of any payments already applied, preventing duplicate reimbursement and ensuring accurate calculation of remaining responsibility. ^[1]

When to Use

Field 54 is situational and should be completed only when a payer listed on the claim has already made a payment to the provider for the same services. ^[1] Common scenarios include:

• A primary insurance has paid a portion of the charges, and the provider is now billing a secondary or tertiary payer.
• A commercial health plan issued a partial payment before the final claim was submitted (e.g., after a pre‑authorization or interim billing).
• The provider received a payment from a worker’s compensation or auto insurance carrier that must be reported to another payer.

The field is not required for all claims; it is only used when a prior payment exists. ^[1] Providers must never report Medicare prior payments in this field, as Medicare payments are handled through separate coordination of benefits processes. ^[1] The amount entered should reflect the cumulative payment received to date from that specific payer, not the total expected or estimated amount.

Step-by-Step Claim Example

Consider a patient admitted for an inpatient stay. The primary insurance (Blue Cross) has already paid $1,200.00 toward the bill. The provider now submits a UB‑04 to the secondary insurance (Medicaid). In Field 54, the provider must enter the amount received from Blue Cross.

1. Identify the payer for which the prior payment applies. In this example, the secondary payer is Medicaid, so the prior payment from Blue Cross is reported in the payer‑specific block (a, b, or c) that corresponds to Blue Cross. ^[1]
2. Enter the exact amount received – $1,200.00 – in the appropriate sub‑field (e.g., FL 54a). Do not include any deductions, adjustments, or estimated amounts. ^[1]
3. Verify that the payer is not Medicare. If the prior payment came from Medicare, do not enter it in FL 54. ^[1]
4. Complete the remaining fields for the secondary payer, including FL 55 (Estimated Amount Due) if applicable, which is calculated as the estimated responsibility less prior payments. ^[1]

The claim is then submitted with the prior payment amount clearly documented, allowing the secondary payer to calculate its remaining liability accurately.

Common Mistakes & Audit Red Flags

Several errors in Field 54 can trigger claim denials or audit scrutiny:

• Reporting Medicare prior payments – The instructions explicitly prohibit entering Medicare payments in this field. Doing so may cause coordination‑of‑benefit errors and duplicate payment. ^[1]
• Entering estimated or expected payments – Only actual amounts received to date should be reported. Using projected payments can lead to incorrect reimbursement. ^[1]
• Using the field when no prior payment exists – Field 54 is situational; leaving it blank when no payment has been received is correct. Filling it with “0” or a non‑zero amount when no payment occurred may be considered a data error. ^[1]
• Mismatching payer order – The prior payment amount must correspond to the correct payer in the claim’s payer loop. Placing the amount in the wrong sub‑field (a, b, or c) can confuse the adjudication system. ^[1]
• Omitting the field when a prior payment exists – If a payer has already paid, failing to report it may result in overpayment by the subsequent payer, leading to recoupment. ^[1]

Auditors often cross‑check FL 54 against payment records and coordination‑of‑benefit logs. Inconsistencies can trigger a review of the provider’s billing practices.

Related Codes/Fields

The following table lists fields that are directly related to Field 54, as referenced in the same Maryland Medicaid UB‑04 instructions. ^[1]

Field	Name	Relationship to FL 54
FL 53 a,b,c	Assignment of Benefits Certification Indicator	Indicates whether the provider has a signed form authorizing the payer to remit payment directly. Prior payments (FL 54) are typically only applicable when assignment of benefits is in place. [1]
FL 55 a,b,c	Estimated Amount Due	Represents the provider’s estimate of the amount due from the payer, calculated as estimated responsibility less prior payments (FL 54). [1]
FL 56	National Provider Identifier (NPI) – Billing Provider	Identifies the billing provider; prior payments are linked to the provider’s NPI. [1]
FL 57 a,b,c	Other (Billing) Provider Identifier – Legacy	Used when a legacy identifier is required; prior payments may be tracked under this ID. [1]

These fields work together to ensure accurate payment reconciliation and coordination of benefits.

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References

[1] Maryland Medicaid — FL 54 — https://health.maryland.gov/mmcp/provider/Documents/ffs-billing/UB04-Hospital-Billing-Instructions%20%281%29.pdf