PR-204 is one of those denial codes that looks straightforward but hides a real decision tree underneath it. When it shows up on your ERA, most billers look at it, assume there is nothing to do, and move on. Sometimes that is correct. But in a meaningful number of cases, PR-204 is either appealable, results in a legitimate patient bill, or signals a process error upstream that is entirely preventable.
This guide covers exactly what PR-204 means, when you can bill the patient for it, when you cannot, how to appeal it when the payer has made an error, and what upstream steps prevent it from appearing in the first place. For the full library of denial codes, see our medical billing denial codes reference.
What Does PR-204 Mean?
PR-204 means the service is not covered by the patient’s insurance plan, and the financial responsibility for the charge belongs to the patient. The PR prefix stands for Patient Responsibility. Code 204 specifically indicates the service, equipment, or drug is not covered under the patient’s benefit plan.
Unlike CO (Contractual Obligation) codes, which represent amounts the provider has agreed to write off under their payer contract, PR codes indicate amounts that can be shifted to the patient, provided specific conditions are met. PR-204 is one of those codes where the patient billing question is not automatic. It depends on what the patient was told before the service was rendered.
The code is maintained by the Washington Publishing Company on behalf of CMS as part of the Claim Adjustment Reason Code (CARC) set used across all U.S. payers under HIPAA ASC X12 835 transaction standards.
| Quick Reference: PR-204 at a Glance Code: PR-204 Prefix: PR = Patient Responsibility (the patient owes this amount, not a write-off) Meaning: Service, item, or drug is not covered under the patient’s benefit plan Can you bill? Only if the patient was informed and agreed in writing before service Appealable? Yes, in specific circumstances (see below) Prevention: Eligibility verification + benefit limitation check before every visit |
When Can You Bill the Patient for PR-204?
This is the question that matters most, and the answer depends on one thing: whether the patient was informed that the service might not be covered and whether they agreed to pay for it before the service was provided.
If a valid Advanced Beneficiary Notice of Non-Coverage (ABN) was signed before the service for Medicare patients, or an equivalent financial responsibility agreement for commercial payer patients, you can bill the patient for the full amount. If no such notice was signed, you cannot.
The ABN requirement is not administrative paperwork. Under Medicare rules, a provider who fails to give proper ABN notification before a non-covered service, and then bills the patient for it, is in violation of Medicare billing rules. The patient can dispute the charge and the provider may be required to refund it.
| Situation | Can You Bill the Patient? | What to Do |
| ABN or financial agreement signed before service | Yes | Bill the patient for the non-covered amount at your standard rate |
| No ABN or agreement — Medicare patient | No | Write off the amount. Billing the patient is a Medicare compliance violation. |
| No ABN or agreement — commercial payer | Depends on plan and state | Review plan contract terms and state balance billing laws before billing patient |
| Service was incorrectly coded as non-covered | No | Correct the coding and resubmit to payer before billing patient |
| Payer applied PR-204 in error (service is covered) | No appeal instead | Submit a formal appeal with plan benefit documentation |
The ABN Requirement: What It Means in Practice
For Medicare patients specifically, the CMS Advanced Beneficiary Notice of Non-Coverage is a standardized form (CMS-R-131) that must be given to the patient before a service the provider believes Medicare may not cover. The ABN must:
- Identify the specific item or service in plain language
- Give a reason why Medicare may not cover it
- Provide an estimated cost
- Offer the patient a choice: receive the service and agree to pay, or decline the service
- Be signed and dated by the patient before the service is performed
An ABN given after the service, or one that is vague about what service or amount is at issue, does not protect the provider’s right to bill the patient. It has to be specific, timely, and voluntary on the patient’s part.
For commercial payer patients, the equivalent is a financial responsibility or non-covered service agreement that discloses the same information. Requirements vary by state. California, New York, New Jersey, and several other states have specific surprise billing and balance billing protections that limit when and how patients can be billed for non-covered services at in-network facilities. Know your state’s rules before billing any patient for a PR-204 denial.
When Is PR-204 Appealable?
PR-204 is not always correct. There are several scenarios where the payer has applied it in error and a formal appeal is the right response.
The Service Is Actually Covered
Some payers apply PR-204 when the service is in fact covered under the patient’s plan but the claim was coded in a way that triggered a non-covered service flag. If the procedure or diagnosis code combination does not map to a covered benefit in the payer’s system, you may receive PR-204 even though the service is a covered benefit.
Action: Pull the patient’s Evidence of Coverage or Summary of Benefits and confirm whether the service is listed as a covered benefit. If it is covered, submit a formal appeal with the plan’s benefit documentation attached. Clearly state in the appeal: ‘The payer has applied PR-204 in error. The service billed under CPT [code] is a covered benefit under this patient’s plan, as documented in the attached Summary of Benefits.’
Wrong Plan Type Applied
This happens more often in practices with high Medicaid or dual-eligible patient volume. A service that is not covered under a patient’s commercial plan may be covered under their Medicaid plan, or vice versa. If the claim was submitted to the wrong payer as primary, PR-204 may appear where a covered service denial should not.
Action: Verify coordination of benefits. Confirm which plan is primary and which is secondary. Resubmit to the correct primary payer with updated COB information if the claim was routed incorrectly.
Benefit Limitation Applied Incorrectly
Some PR-204 denials are triggered when a patient has exceeded a plan-imposed visit or service limit. A physical therapy plan with a 30-visit annual cap, for example, will return PR-204 on visit 31. But sometimes the payer’s internal counter is wrong because prior claims were processed under a different NPI or provider ID.
Action: Request a benefit utilization report from the payer to confirm how many visits or services have been counted against the limit. If the count is wrong, submit a formal appeal with documentation of actual services rendered.
PR-204 Resolution: Step by Step
When a PR-204 denial arrives on your ERA, work through these steps in order before making any patient billing or write-off decision.
- Step 1: Confirm the service is genuinely non-covered. Pull the patient’s plan documents or call the payer’s provider line to confirm the specific service under the CPT code billed is excluded from coverage. Do not assume the payer is correct.
- Step 2: Check whether an ABN or financial agreement was signed. Review the patient account. If a valid, signed notice exists and the service is genuinely non-covered, you can bill the patient.
- Step 3: Check your state’s balance billing rules. Even with a signed agreement, some state laws restrict patient billing for non-covered services at in-network facilities. California AB-72, New York’s balance billing protections, and New Jersey’s Out-of-Network Protection Act all impose specific limitations.
- Step 4: Verify the coding is correct. If the service is covered under the plan but the code combination triggered a non-covered flag, correct the coding and resubmit. This is a resubmission, not an appeal.
- Step 5: Appeal if the payer applied PR-204 in error. Submit within the payer’s appeal window (typically 60 to 180 days from the denial date) with plan benefit documentation. For a full appeal guide see How to Appeal a Denied Insurance Claim.
- Step 6: Bill the patient or write off. If the service is genuinely non-covered, the ABN was properly obtained, and your state’s rules allow it, bill the patient at your standard rate. If any of those conditions are not met, write off the amount.
How to Prevent PR-204 Denials
Most PR-204 denials can be prevented at the eligibility verification stage, before the patient is seen. The critical step that most practices skip is checking not just whether the patient is covered, but what their plan specifically covers and excludes.
General eligibility verification confirms the insurance is active and the provider is in-network. It does not tell you whether a specific service is a covered benefit under that patient’s plan. For that, you need a benefits verification call or a detailed plan document review, especially for services that are commonly excluded: cosmetic procedures, certain diagnostic tests, experimental treatments, or services that exceed plan visit limits.
| Prevention Protocol — PR-204 Before every visit: run real-time eligibility and confirm active coverage For non-routine services: call the payer’s benefits line to confirm the specific CPT code is a covered benefit Identify plan exclusions at intake: ask the patient directly about known plan limitations For any service you suspect may not be covered: obtain a signed ABN (Medicare) or financial agreement (commercial) before the service is rendered Check visit or service limits: for therapy, mental health, and other benefit-capped services, track utilization against the plan cap Train front desk to recognize high-risk service categories: cosmetic, investigational, and elective procedures that are commonly excluded |
PR-204 vs. CO-96: What Is the Difference?
Billers sometimes see both PR-204 and CO-96 on claims involving non-covered services, and the distinction matters for how you handle each. CO-96 (non-covered charge) is a Contractual Obligation code, meaning the amount is a write-off under the provider’s payer contract and cannot be billed to the patient. PR-204 is a Patient Responsibility code, meaning the amount can potentially be billed to the patient if the correct notice was obtained.
In practice: if you receive CO-96, write it off. If you receive PR-204, work through the decision table above before deciding whether to bill the patient or write off. Never treat a CO code as a patient billing opportunity. For the full breakdown of CO vs. PR code behavior, see our complete denial codes reference.
Working PR-204 Correctly
PR-204 is not a simple write-off and it is not an automatic patient bill. It requires a specific decision process every time it appears, and skipping any step in that process either leaves money on the table or creates a compliance exposure.
If PR-204 is showing up regularly on your ERA, that is a signal that your eligibility and benefits verification process is not catching plan exclusions before services are rendered. Fixing that upstream process eliminates most PR-204 denials before they happen. If your practice is seeing a pattern of these denials across multiple patients or payers, our denial management team can run a root-cause analysis and identify exactly which service types or plan combinations are generating them.
Frequently Asked Questions About PR-204
PR-204 on an EOB means the service is not covered under the patient’s insurance plan and the patient is responsible for the charge. The PR prefix identifies it as a Patient Responsibility code. Whether you can actually bill the patient depends on whether they were informed and agreed in writing before the service was provided.
You can bill the patient only if a valid Advanced Beneficiary Notice (for Medicare) or a signed financial responsibility agreement (for commercial payers) was obtained before the service. Without that signed notice, billing the patient is a compliance violation under Medicare rules and may violate your commercial payer contract.
No. PR-204 is a Patient Responsibility code, meaning the patient may owe the amount under specific conditions. CO-96 is a Contractual Obligation code, meaning the amount must be written off under the provider’s payer contract. Billing a patient for a CO-96 adjustment violates the payer contract.
PR-204 can be appealed when the payer has applied it in error for example, when the service is actually a covered benefit, or when the wrong plan type was applied. Submit a formal appeal within the payer’s appeal window (typically 60 to 180 days from the denial date) with the patient’s plan benefit documentation confirming the service is covered. For the full process, see our guide on how to appeal a denied insurance claim.
The most reliable prevention is a benefits verification call before the service for any non-routine procedure. General eligibility verification confirms coverage is active but does not confirm whether a specific service is a covered benefit. For services with a real risk of non-coverage, obtain a signed ABN or financial agreement before the appointment.
An ABN (Advanced Beneficiary Notice of Non-Coverage) is a CMS form (CMS-R-131) that Medicare providers must give to patients before rendering a service that Medicare may not cover. A properly signed ABN is what allows the provider to bill the patient for a PR-204 denial on a Medicare claim. Without it, the provider must write off the amount.
