Patient Responsibility (PR) codes show up on every remittance advice, and they decide whether a balance moves to the patient, to a secondary payer, or gets written off. A biller who reads them correctly collects faster and sends fewer wrong statements. A biller who misreads them creates patient complaints, write-off errors, and avoidable rework.
This guide explains what PR codes are, how they work inside a claim adjustment, which ones appear most often, and how to handle them in a daily billing workflow. Each code has its own detailed page, linked below.
What Are Patient Responsibility Codes?
A Patient Responsibility code is a Claim Adjustment Group Code used by payers on the Electronic Remittance Advice (ERA, also called the 835) and the paper Explanation of Benefits (EOB). The group code PR tells the provider that the adjusted amount belongs to the patient, or to a secondary insurance if one exists.
The payer does not say “this was denied” with a PR code. It says “this part of the allowed charge is not ours to pay.” That difference matters, because many PR amounts are fully valid and simply reflect the patient’s plan design.
How a PR Code Is Built: Group Code Plus Reason Code
Every adjustment on an ERA carries two pieces of information in the CAS segment:
- Group code: shows who is financially responsible. PR means patient.
- Claim Adjustment Reason Code (CARC): explains why the amount was adjusted.
So “PR 2” is group code PR combined with reason code 2, which is coinsurance. Some payers add a Remittance Advice Remark Code (RARC) for extra detail, such as a missing document or a benefit limit. The group code, CARC, and RARC should always be read together, never in isolation.
Code descriptions follow the X12 CARC and RARC lists maintained through Washington Publishing Company. These lists are updated periodically, so billing teams should check the current official code descriptions and update notices.
The Five Claim Adjustment Group Codes
PR is one of the most commonly discussed claim adjustment group codes. Billing teams can avoid posting errors by distinguishing PR from the other adjustment group codes.
| Group Code | Meaning | Who Absorbs the Amount |
| PR | Patient Responsibility | Patient or potentially a secondary payer, subject to coverage and liability rules |
| CO | Contractual Obligation | Generally adjusted according to the provider’s contractual obligations |
| OA | Other Adjustment | Depends on the adjustment and payer explanation |
| PI | Payer Initiated Reduction | Depends on the reason and applicable payer rules |
| CR | Correction and Reversal | Used for correction or reversal adjustments where applicable |
Important: CR is not to be used with transaction version 005010 and later. Because this article focuses on current 835 billing workflows, verify the applicable transaction version and official implementation guidance rather than treating all five group codes as universally applicable.
Most Common Patient Responsibility Codes
You will see a small group of PR codes on most remittances. Here is what each one signals at a glance.
| Code | What It Usually Means | Typical Next Step |
| PR 1 | Deductible applied | Check the deductible and submit to secondary insurance when applicable |
| PR 2 | Coinsurance applied | Verify the allowed amount and applicable coinsurance |
| PR 3 | Copayment applied | Confirm whether the copay was already collected at check-in |
| PR 26 | Expenses incurred before coverage began | Verify coverage dates and other possible coverage |
| PR 27 | Expenses incurred after coverage terminated | Check eligibility and other active coverage |
| PR 31 | Patient cannot be identified as the insurer’s insured | Correct demographic or policy information |
| PR 49 | Noncovered service involving a routine or preventive exam or related diagnostic or screening procedure | Review benefits, coding, and payer guidance |
| PR 50 | Service not considered medically necessary by the payer | Review documentation, applicable liability rules, and appeal options |
| PR 96 | Non covered charge | Confirm the applicable exclusion and any required patient notice |
| PR 119 | Benefit maximum reached | Verify the current code description and benefit limit before billing |
| PR 204 | Service, equipment, or drug not covered under the patient’s current benefit plan | Verify plan coverage and applicable patient liability rules |
Important: These summaries are for quick reference. Confirm the current official CARC description, any accompanying RARC, and applicable payer rules before billing a patient. A PR group code alone does not establish that the patient is legally responsible for the amount.
Deductible, Coinsurance, and Copay: The Three Core PR Codes
Many patient balances come from three common codes.
PR 1 represents the deductible, which is the amount a patient must pay under the plan’s deductible provisions. For PR 2, the adjustment reflects coinsurance, meaning the patient’s share of the allowed amount after applicable deductible requirements are met. PR 3 indicates a copayment, a fixed amount the patient may owe for a covered service or visit, depending on the plan’s benefits.
These amounts can appear together on a claim, depending on the patient’s benefits and how the payer processes the service. A simple example shows how the math flows:
– Billed charge: $300
-Allowed amount: $200
-Contractual adjustment (CO): $100
-Deductible (PR 1): $100
-Coinsurance at 20% of the remaining $100 (PR 2): $20
-Plan payment: $80
-Patient responsibility before considering secondary coverage or prior payments: $120
Notice that the $100 contractual adjustment is not normally billable to the patient when it represents a contractual write-off. The PR amounts represent the adjustment category, but the provider should still confirm secondary coverage, previous payments, and applicable liability requirements before issuing a statement. That distinction helps prevent balance billing errors.
Non Covered and Eligibility Related PR Codes
Some PR codes are not about routine cost sharing. They may point to coverage, benefit, or medical necessity issues.
- Coverage timing: PR 26 and PR 27 indicate that expenses fall outside the applicable coverage period.
- Identification problems: PR 31 indicates that the patient cannot be identified as the insurer’s insured.
- Benefit exclusions: PR 49, PR 96, and PR 204 relate to specific noncovered services or benefits.
- Limits and medical necessity: PR 119 relates to a benefit maximum, while PR 50 relates to a medical necessity determination.
These codes may indicate a registration, eligibility, coding, or coverage issue rather than a payer processing error. Checking eligibility before the visit can help prevent some avoidable problems. Registration and benefit verification are important parts of medical billing for clinics and physician practices.
However, a noncovered-service adjustment does not automatically mean the patient can be billed. Review the patient’s plan, applicable payer requirements, relevant regulations, and any required advance notice or waiver before transferring the amount to patient accounts receivable.
How to Read PR Codes on a Remittance
On an ERA, adjustments appear in Claim Adjustment (CAS) segments with the group code, reason code, and adjustment amount. On a paper EOB, similar information appears in columns alongside the relevant service line.
A reliable reading order looks like this:
- Find the service line and its date of service.
- Read the group code to identify the adjustment category.
- Read the reason code to understand why the amount was adjusted.
- Check for a RARC that adds further information.
- Compare the adjustment totals with the allowed amount, payer payment, and billed charge.
- Verify secondary coverage, prior patient payments, and applicable patient liability requirements before issuing a statement.
This process helps billing staff distinguish legitimate patient cost sharing from adjustments that need correction, additional documentation, or further payer review.
What To Do When You Receive a PR Adjustment
PR does not always mean “send a statement.” The appropriate action depends on the reason code, the patient’s coverage, and the circumstances of the claim.
- Check for a secondary payer. If the patient has secondary coverage, review the primary payer’s remittance and submit the claim to the secondary payer when coordination-of-benefits rules apply. The secondary plan may cover some or all of the remaining balance, or it may leave the amount unchanged. Confirm the final patient responsibility before issuing a statement.
- Confirm the amount against the plan. Compare deductible and coinsurance amounts with the eligibility response and the payer’s adjudication.
- Check what was collected at the front desk. A copay already paid should be matched to the PR 3 amount, not billed again.
- Review noncovered items before billing the patient. Some payers, services, and programs require advance notice or a signed waiver before a patient can be held responsible.
- Post the adjustment correctly. Payment posting errors can turn small PR balances into large accounts receivable problems.
- Investigate unexpected adjustments. When an amount looks wrong, review coding, coordination of benefits, payer processing, and the accompanying remark codes.
Following these steps helps reduce incorrect statements and avoidable rework while keeping patient accounts accurate.
Common Mistakes With PR Codes
Practices can lose revenue and patient trust through recurring billing mistakes:
- Billing the patient for a CO adjustment that should be handled under contractual terms
- Treating every PR adjustment as a denial that requires an appeal
- Skipping the secondary claim when applicable coverage exists
- Posting the full PR amount as a patient balance without checking for a prepaid copay
- Ignoring the RARC that explains the adjustment
- Using outdated code descriptions
- Assuming that every PR amount is automatically billable to the patient
- Failing to check advance notice, waiver, or payer requirements for noncovered services
Many of these show up during medical billing audit services that review denial and adjustment accuracy, where posting patterns and group code usage are checked line by line.
How PR Codes Affect Your Revenue Cycle
Patient responsibility now makes up a larger share of provider revenue than it did a decade ago, mostly because of higher deductibles and coinsurance. That means PR handling affects days in accounts receivable, patient collection rates, and statement volume.
Practices that treat PR as a routine step, rather than a leftover, tend to collect faster. Front end eligibility, accurate posting, timely statements, and clear patient communication all work together, which is why end to end revenue cycle management services for healthcare providers treat patient balances as a managed process and not an afterthought.
Best Practices for Managing Patient Responsibility
- Verify benefits before every visit, including deductible status and coinsurance rates.
- Collect copays and known balances at check in.
- Train posting staff to separate PR from CO on every line.
- Keep a current reference of group codes, CARCs, and RARCs.
- Send clear patient statements that explain what the balance is for.
- Review PR trends monthly to spot payer or front desk patterns.
Frequently Asked Questions
Q1- Is a PR code the same as a denial?
No. Many PR codes simply show the patient’s share of an allowed charge. Some, such as non covered service codes, reflect a coverage issue and need review before billing.
Q2- Can I always bill the patient for a PR amount?
Usually yes, but check for a secondary payer first and confirm any required notice or waiver for non covered services.
Q3- What is the difference between PR 1, PR 2, and PR 3?
PR 1 is deductible, PR 2 is coinsurance, and PR 3 is copayment.
Q4- How often do the code lists change?
The X12 lists are updated several times a year, so definitions and usage should be rechecked regularly.
Conclusion
Patient Responsibility codes help billing teams understand how a payer categorized an adjustment and why it occurred. By distinguishing PR from CO, reading the group code and reason code together, and matching the adjustment to the patient’s actual benefits, practices can resolve many balance problems more accurately.
Use current official code references, verify secondary coverage, and confirm patient liability before sending statements. These steps help protect revenue, reduce billing errors, and improve the patient billing experience.
How PHCS Can Help With Patient Responsibility Codes
At Proactive Healthcare Services, we help healthcare providers maintain accurate patient balances by reviewing PR and CO adjustments during payment posting, following up on secondary claims, and investigating payer errors before they result in incorrect patient statements.
If your remittances show the patterns described in this guide, contact PHCS to discuss a review of your patient responsibility workflow and identify opportunities to improve payment posting accuracy, follow-up, and revenue cycle performance.
