PR-1 Denial Code in Medical Billing: The Complete 2026 Guide

Quick Answers

The PR-1 denial code is a patient responsibility adjustment with the description “Deductible Amount,” meaning the payer processed the claim, applied the allowed amount to the patient’s remaining annual deductible, and assigned the balance to the patient rather than paying the provider. It is not a coverage denial or a claim rejection. The service was covered and the claim was adjudicated correctly, but the patient had not yet satisfied their deductible at the time of service.

• PR means patient responsibility: The PR group code assigns financial liability to the patient, not the provider. When you see PR-1, the correct next step is to bill the patient or submit to a secondary payer, not to appeal the adjustment.
• HDHP patients drive the highest volume: High-deductible health plans carry minimum deductibles of $1,700 for self-only coverage and $3,400 for family coverage in 2026, per IRS Revenue Procedure 2025-19. PR-1 fires on nearly every claim for these patients until the deductible is met, which creates a seasonal surge in Q1 each year.
• NJ Medicaid PR-1 is a different document entirely: The “NJ Medicaid PR-1 form” is the Statement of Available Income for Medicaid Payment used in long-term care and hospice billing in New Jersey. It has nothing to do with the CARC 1 denial code. Confusing the two is a common search engine mix-up that sends billers to the wrong resource.

What PR-1 Actually Means

PR-1 combines two pieces of information from the X12 835 electronic remittance advice. The first piece is the group code: PR, which stands for patient responsibility. The second is the Claim Adjustment Reason Code, CARC 1, which carries the official description “Deductible Amount.” The code has been active since January 1, 1995, and its description has not changed since activation. It is maintained by the Washington Publishing Company under CMS coordination, and the full CARC list was last reviewed on May 1, 2026, with no modifications to CARC 1.

On the 835 transaction, PR-1 appears in the CAS (Claim Adjustment) segment. CAS01 is the group code (PR). CAS02 is the reason code (1). CAS03 is the dollar amount the payer applied to the patient’s deductible. Your practice management system reads those three fields and displays “PR-1” on your denial report or remittance summary. Some systems display it as “PR 01” or “PR-01,” but the underlying data is identical regardless of how the software formats it.

The critical distinction is that PR-1 is not a denial in the traditional sense. A true denial means the payer refused to pay the claim because something was wrong with the submission, the coding, or the coverage. PR-1 means the payer reviewed the claim, confirmed the service was covered, calculated the allowed amount, and then applied that allowed amount to the patient’s unmet deductible. The claim was adjudicated correctly. The money is simply owed by the patient, not the payer.

One question we hear constantly from practice managers is why PR-1 shows up on their denial reports at all if the claim was processed correctly. The answer is that most billing systems classify any remittance where the provider receives zero or partial payment as a “denial,” even when the payer did exactly what it was supposed to do. That classification quirk is why PR-1 consistently ranks among the top denial codes by volume, even though it is really a patient billing trigger, not a claim problem.

How PR-1 Appears on the ERA

Understanding where PR-1 lives on the electronic remittance advice is what separates a biller who posts correctly from one who creates downstream problems. The 835 ERA is the HIPAA-standard electronic file that payers send after adjudicating a claim, and it carries line-level detail on every payment, adjustment, and patient-responsibility assignment. For a full overview of how ERAs work and why they matter to posting accuracy, see our guide on ERA in medical billing.

When a payer adjudicates a claim and applies a portion to the patient’s deductible, the ERA’s CAS segment will show the PR group code in the first position, CARC 1 in the second, and the dollar amount in the third. If the patient also owes coinsurance or a copayment on the same claim, you will see PR-2 (coinsurance amount) and PR-3 (copayment amount) in additional CAS segments on the same service line. This is the PR 1 2 3 sequence in medical billing, and it represents the full patient cost-sharing breakdown for a single service.

The allowed amount, the contractual adjustment, and the patient responsibility amount should add up to the billed charge on every line. If they do not, something is wrong with the remittance, and the biller needs to investigate before posting. That math check is the first quality gate in payment posting, and it catches a surprising number of payer errors before they become AR problems. For practices that want to understand how the posting step fits into the broader billing cycle, our guide on what payment posting is in medical billing covers the full process.

In our experience matching providers with billing partners, the practices that handle PR-1 volume well are the ones whose posting teams read the CAS segment on every remittance rather than just looking at the payment amount. Auto-posting from the ERA handles this automatically for most claims, but the human review on exceptions is where the real money protection happens.

PR-1 vs CO Adjustments: Why the Group Code Matters

The group code on a remittance adjustment tells you who owes the money. PR means the patient is responsible. CO means the provider must write off the amount as a contractual obligation. Confusing the two is one of the most expensive posting errors in medical billing, and it happens far more often than most practice managers realize.

The most common pairing on a standard remittance is CO-45 alongside PR-1. CO-45 is the contractual write-off, the difference between your billed charge and the payer’s allowed amount that you agreed to absorb under your contract. PR-1 is the portion of the allowed amount that goes to the patient’s deductible. The provider cannot bill the patient for the CO-45 amount, and the provider must bill the patient for the PR-1 amount. Getting either one backward creates a compliance problem.

Per CMS Medicare ERA group code guidance, Medicare beneficiaries may be billed only when the PR group code is used with an adjustment. When CO appears instead of PR, billing the patient is a program rule violation. That rule applies across the Medicare program, and most commercial payers follow the same logic even if they do not cite the same regulatory authority.

For a deeper look at how CO-45 adjustments work and when to appeal them, see our guide on CO-45 denial code fixes. For bundled service adjustments that sometimes appear alongside PR-1 on the same remittance, see our guide on the CO-97 denial code. Understanding the difference between these group codes is the foundation of accurate payment posting and compliant patient billing.

What Triggers a PR-1 Adjustment?

PR-1 appears on a remittance whenever the payer applies some or all of the allowed amount to the patient’s remaining deductible. The triggers fall into a few predictable categories, and understanding them is what helps a billing team anticipate volume and prepare patient communication before the statements go out.

• Annual deductible not met. This is the standard scenario. The patient has not yet satisfied their annual deductible, so the payer applies the allowed amount to the remaining balance. Verify the applied amount against the patient’s current deductible status in the payer portal before sending a statement.
• High-deductible health plan patients. HDHP patients carry minimum deductibles of $1,700 for individual coverage and $3,400 for family coverage in 2026, per IRS Revenue Procedure 2025-19. PR-1 fires on virtually every claim for these patients until the deductible threshold is reached, which typically creates a PR-1 surge in January through March each year when deductibles reset.
• New benefit year. Deductibles reset at the start of each benefit year, which is January 1 for most plans. Practices that are not prepared for the Q1 deductible reset see a sharp spike in PR-1 volume that overwhelms patient billing workflows and delays collections.
• In-network vs out-of-network deductible confusion. Many plans maintain separate deductibles for in-network and out-of-network providers. A patient who has met their in-network deductible may still trigger PR-1 on an out-of-network claim because the out-of-network deductible is tracked independently. Some plans do cross-accumulate, but the default is separate tracking.
• Secondary insurance not checked. When the primary payer assigns PR-1, a secondary payer may cover some or all of the patient’s deductible obligation. Failing to submit to the secondary before billing the patient is one of the most common reasons practices leave money on the table with PR-1 adjustments. For practices juggling multiple payers, our guide on coordination of benefits in medical billing explains how primary and secondary coverage interact.

Across the billing companies we vet, a recurring pattern separates the ones that collect well on PR-1 from the ones that do not: the strong operators verify deductible status at the front desk before the patient is seen, which means the patient conversation about cost happens before the service rather than weeks later when a surprise statement arrives.

How to Handle PR-1 on a Remittance

PR-1 is a patient billing trigger, not a denial to appeal. The workflow is straightforward when the adjustment is legitimate, but it requires verification before you send a statement. These six steps are the standard process for handling PR-1 correctly.

1. Verify the deductible status. Check the payer portal or call the payer to confirm the patient’s current deductible balance. The amount applied on the remittance should match the patient’s remaining deductible at the time of service.
2. Confirm the group code is PR, not CO. If the group code is CO instead of PR, the amount is a contractual write-off and cannot be billed to the patient. This verification takes seconds and prevents a compliance violation.
3. Check for secondary insurance. If the patient has a secondary payer, submit the claim with the primary ERA attached before billing the patient directly. The secondary may cover part or all of the deductible balance.
4. Post the adjustment to the patient balance. Record the PR-1 amount against the correct claim and service line so the patient’s account reflects the balance accurately.
5. Send the patient statement promptly. PR-1 balances are the patient’s responsibility by definition. Delaying the statement reduces the likelihood of collection. The faster the statement goes out after posting, the higher the collection rate.
6. Flag any discrepancy for follow-up. If the deductible amount on the remittance does not match the patient’s actual deductible status, do not bill the patient. Instead, contact the payer to resolve the discrepancy. Incorrect deductible application by the payer is appealable.

Is the NJ Medicaid PR-1 Form the Same Thing?

No. The NJ Medicaid PR-1 form and the PR-1 denial code are completely unrelated, but the identical name causes constant confusion in search results. The NJ Medicaid PR-1 is the “Statement of Available Income for Medicaid Payment,” a form used in New Jersey’s long-term care and hospice billing system to document a beneficiary’s available income that offsets the cost of institutional care.

The form is administered through the NJMMIS system (New Jersey Medicaid Management Information System, now operated by Gainwell Technologies) and is generated by the County Welfare Agency. It was converted from a paper process to a web-enabled workflow in 2013 under Medicaid Communication No. 13-10. The PR-1 form is used exclusively for Medicaid beneficiaries in nursing facilities or receiving hospice care, and it calculates the portion of the beneficiary’s income that must be contributed toward the cost of care.

If you landed on this page searching for the NJ Medicaid PR-1 form, the resource you need is the NJMMIS provider portal at njmmis.com or the DMAHS Provider Enrollment Unit at 609-588-6036. If you are a biller looking at a PR-1 adjustment on a commercial or Medicare remittance, you are in the right place, and the rest of this guide applies to your situation.

Providers often come to us after spending time chasing the wrong PR-1 resource because their search results mixed the two together. The naming overlap is an industry quirk, and knowing the difference saves real time for billing staff working remittance queues.

Common PR-1 Mistakes and How to Fix Them

Every practice that bills at volume runs into the same set of PR-1 handling errors. The practices that collect well on patient responsibility balances are the ones that treat these as process problems rather than one-off mistakes.

• Writing off PR-1 as a contractual adjustment. When a biller posts PR-1 as a write-off instead of transferring it to the patient balance, the practice absorbs money the patient legitimately owes. This is the single most expensive PR-1 error and it compounds silently because no one flags a write-off for review. Fix: verify the group code is PR before applying any adjustment, and never write off a PR amount without manager approval.
• Skipping the secondary payer. Billing the patient without first submitting to a secondary insurance leaves money uncollected that another payer would have covered. Fix: build a secondary insurance check into the posting workflow for every PR-1 remittance before generating a patient statement.
• Not verifying the deductible amount with the payer. Payers sometimes miscalculate the remaining deductible, especially when multiple claims process simultaneously. Sending a statement without verifying the amount can result in overbilling the patient or underbilling and losing the difference. Fix: spot-check deductible balances against the payer portal, especially when multiple claims for the same patient come back with PR-1 on the same remittance.
• Delaying patient statements. PR-1 balances that sit unposted or unbilled for weeks become harder to collect. Patients are more likely to pay when the statement arrives close to the date of service, while the visit is still fresh. Fix: post PR-1 adjustments and generate patient statements on a daily or near-daily cadence.
• Appealing PR-1 when the deductible is legitimately unmet. Unlike CO-45 or CO-97, PR-1 is rarely an appeal candidate when the deductible information is correct. Appealing a legitimate PR-1 wastes staff time and payer goodwill. Fix: appeal only when the deductible amount on the remittance conflicts with the patient’s actual deductible status in the payer portal.

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