What Are the PR-1, PR-2, and PR-3 Patient Responsibility Codes?

Every line on an 835 ERA (electronic remittance advice) or paper EOB carries a Group Code that tells you who owns the adjustment, and a Claim Adjustment Reason Code (CARC) that tells you why. The Group Code PR stands for Patient Responsibility — the amount the payer has shifted to the patient by plan design, not because the provider did anything wrong. The three foundational PR codes are:

• PR-1 — Deductible. The fixed amount the patient must pay out of pocket each benefit year before the plan starts paying its share. Early in the calendar year you will see PR-1 dominate; once a patient meets their deductible, PR-1 stops appearing and PR-2 takes over.
• PR-2 — Coinsurance. The patient's percentage share of the allowed amount after the deductible is met — commonly 20% on Medicare Part B and many commercial PPO plans. PR-2 is calculated on the contracted/allowed amount, not your billed charge.
• PR-3 — Copay. A fixed dollar amount the patient owes per visit or per service (for example, \$30 for a specialist visit), set by the plan and usually collected at the point of service.

The single most important thing to understand about all three is that PR means the amount is yours to collect from the patient. This is the opposite of the CO (Contractual Obligation) group code, where the adjustment is a provider write-off you are contractually forbidden to bill. In our patient-statement audits, the most expensive recurring error we see is a practice billing patients for CO amounts (illegal balance billing) while failing to bill legitimate PR-1/PR-2/PR-3 balances (leaving real, collectible revenue on the table). Both errors trace back to misreading the group code in front of the number.

For a primer on how group codes and CARCs fit together on the remittance, see the CARC glossary entry and how to read an EOB.

The table below decodes each code, the math behind it, where the dollar figure comes from, and the exact billing action. Read the group code first, then the reason code — both have to line up before you put a charge on a patient statement.

Three rules that keep PR billing clean and compliant:

1. The amount must already be under a PR group code on the remittance before you bill it. You bill the patient the PR-1/2/3 figure the payer reported — not a number you back-calculated from the charge. If the deductible, coinsurance, or copay is not on the ERA under PR, it is not yet the patient's responsibility.
2. Coinsurance (PR-2) is on the allowed amount, not the billed charge. A \$300 billed charge with a \$120 allowed amount and 20% coinsurance produces a PR-2 of \$24, not \$60. Billing the patient 20% of your charge is a common — and overcharging — error.
3. PR is billable; CO and OA are not patient-billable adjustments. Only PR amounts go on the patient statement. CO (Contractual Obligation) and OA (Other Adjustment) amounts stay off the patient bill.

The PR group code is permission to bill the patient, but it is not unconditional. A handful of situations override it, and billing a patient anyway is how practices generate complaints, refunds, and in some cases regulatory penalties.

You CAN bill the patient for PR-1, PR-2, and PR-3 when:

• The amount is reported on the ERA/EOB under a PR group code, and
• The patient is not a Medicaid or QMB beneficiary (see exceptions below), and
• The service is in-network or the patient knowingly chose out-of-network (No Surprises Act does not apply), and
• Coverage was active on the date of service (no PR-27 termination, no coordination-of-benefits problem inflating the balance).

You CANNOT (or must not) bill the patient when:

• The patient is on Medicaid (or a Medicaid MCO). Federal rules generally prohibit balance billing Medicaid beneficiaries; the state Medicaid program is the payer of last resort and the provider accepts the Medicaid allowable as payment in full. A PR amount on a Medicaid remittance usually means the cost-sharing is owed by Medicaid or a small statutory copay — not a full deductible/coinsurance billable like a commercial plan.
• The patient is a QMB (Qualified Medicare Beneficiary). Federal law prohibits billing QMB beneficiaries for Medicare deductibles, coinsurance, or copays — even though those amounts appear as PR-1/PR-2/PR-3 on the Medicare remittance. The state Medicaid program covers (or partially covers) the cost-sharing. Billing a QMB patient is a federal violation.
• The No Surprises Act applies. For out-of-network emergency care, and for out-of-network providers at in-network facilities, the patient's cost-sharing is capped at in-network levels and the balance above that is not billable. Even where a PR amount shows, you may only collect the in-network-equivalent cost share. See our Good Faith Estimate guide for the related self-pay disclosure rules.
• The amount is actually a CO adjustment misread as PR. Always confirm the group code. A contractual write-off billed to the patient is illegal balance billing.

The operational safeguard is to gate every patient statement on two checks: (1) the amount carries a PR group code on the remittance, and (2) the patient is not in a protected category (Medicaid/QMB/No Surprises Act). Outsourced patient billing and collections services build both gates into the statement workflow so protected patients are automatically suppressed from balance billing.

Once the ERA posts, the PR amounts are what convert into patient-owed balances. The flow from remittance to statement is where revenue is either captured cleanly or lost to write-offs and disputes.

1. Post the ERA / EOB. Payment posting splits each line into the paid amount, the CO write-offs, the OA adjustments, and the PR (patient) balance. Accurate auto-posting from the 835 is what keeps PR amounts from being miscoded. For the mechanics, see payment posting in medical billing.
2. Reconcile point-of-service collections. Match the PR-3 copay (and any deductible collected at check-in) against what was actually collected. If \$30 was collected at check-in and the ERA shows a \$30 PR-3, the line is settled. If the ERA shows PR-1 deductible the patient had not yet met, that becomes a new statement balance.
3. Move the remaining PR balance to patient responsibility. Whatever PR-1 + PR-2 + PR-3 remains after point-of-service collection becomes the patient's statement balance.
4. Suppress protected patients. Before the statement generates, the system checks for Medicaid/QMB status and No Surprises Act flags and removes those balances from the patient queue.
5. Send the patient statement. A clean statement itemizes the service, the allowed amount, the insurance payment, and the patient's PR balance by type (deductible / coinsurance / copay) so the patient can reconcile it against their own EOB.
6. Follow up on aging patient balances. Patient-responsibility A/R ages just like insurance A/R, but patient balances are collected at far lower rates the older they get — which is why first-statement clarity and early follow-up matter.

Worked example. A specialist visit is billed at \$300. The payer's allowed amount is \$150. The patient has not met their deductible, so the ERA reports PR-1 (deductible) of \$150 and the plan pays \$0. The provider writes off the \$150 difference between billed and allowed as CO-45 (contractual). The patient statement shows: billed \$300, allowed \$150, insurance paid \$0, patient owes \$150 (PR-1 deductible) — and the \$150 CO-45 contractual adjustment never touches the patient bill. Get the group codes backwards and you either overbill the patient \$150 (CO billed in error) or under-collect \$150 (PR written off in error).

PR-1, PR-2, and PR-3 are the everyday patient-responsibility codes, but several other PR-prefixed CARCs land on the same patient-balance worklist. They share the PR group code (patient-billable in principle) but each has a distinct cause and a distinct workflow.

Two adjacent codes worth knowing because they are often confused with PR-1/2/3:

• PR-27 — Coverage terminated. Sometimes a balance you think is a deductible is actually a terminated-coverage problem; the patient may be billable, but re-verify eligibility first because the visit may belong to a different active plan. See PR-27 coverage terminated.
• CO-45 — Charge exceeds fee schedule / contracted amount. The contractual write-off that sits next to PR amounts on nearly every commercial line. CO-45 is never patient-billable — it is the gap between your charge and the allowed amount, and confusing it with a PR balance is the classic overbilling mistake.

When PR-227 appears, do not bill the patient a deductible-style balance — the payer is telling you it needs information (often coordination-of-benefits or accident details) from the member before it can finish adjudicating. Get the info, resubmit, and let the corrected remittance tell you the true PR amount. See PR-227.

The two most commonly conflated PR codes are coinsurance (PR-2) and copay (PR-3). They are different cost-sharing mechanisms and they reconcile differently on the statement.

Why it matters operationally. Copays (PR-3) are predictable and should be collected up front — every dollar of copay not collected at check-in costs more to recover later. Coinsurance (PR-2) generally cannot be collected accurately until the payer adjudicates, because it is a percentage of the allowed amount, which you do not know until the ERA arrives. Trying to collect coinsurance at the point of service usually means estimating, then either refunding an overcollection or chasing an undercollection — both of which add cost. A clean workflow collects the copay at check-in, verifies the deductible status during eligibility, and bills the exact coinsurance amount only after the remittance confirms it.

The PR-1/2/3 logic is standardized by X12, but the practical handling differs sharply by payer type.

Medicare (Part B). Medicare's standard structure is a Part B deductible (PR-1) early in the year, then 20% coinsurance (PR-2) on the Medicare-allowed amount for most services. Copays (PR-3) appear under Medicare Advantage plans. The big compliance trap is QMB status: if the Medicare patient is a Qualified Medicare Beneficiary, the PR-1/PR-2/PR-3 amounts on the remittance are not billable to the patient — Medicaid covers the cost-sharing. Many practices bill QMB patients in error because the amounts look like ordinary patient responsibility. Check QMB status before statementing any Medicare PR balance.

Medicaid (state programs and MCOs). Most Medicaid beneficiaries cannot be balance-billed, even when a PR amount appears on the remittance. Medicaid is the payer of last resort and providers accept the Medicaid allowable as payment in full. Some states impose small statutory copays (a few dollars), which are the only patient-billable amounts — and even those often cannot be denied for inability to pay. Treat a PR amount on a Medicaid remittance as the rare exception, not the rule, and verify the state's specific cost-sharing policy. See our Medicaid billing guidance for the program basics.

Commercial payers. Commercial plans are where PR-1/2/3 behave most like the textbook: a real annual deductible (PR-1), percentage coinsurance on the allowed amount (PR-2), and per-visit copays (PR-3) — all genuinely billable to the patient. The cautions here are the No Surprises Act (out-of-network emergency and facility-based care cap the patient's cost share) and high-deductible health plans (HDHPs), where large PR-1 deductible balances make front-end eligibility verification and clear patient statements essential to actually collecting. Real-time eligibility verification that returns deductible-met and copay data lets you collect accurately at the point of service instead of chasing balances later.

Patient responsibility is now a large and growing share of provider revenue as deductibles rise, and PR-1/2/3 balances are collected at far lower rates than insurance A/R once they age. A disciplined, compliant collection workflow protects both the revenue and the practice.

1. Verify before the visit. Run real-time eligibility (270/271) that returns the deductible amount, deductible-met status, copay, and coinsurance percentage. Knowing the copay (PR-3) lets you collect it at check-in; knowing deductible status tells you whether to expect a large PR-1 balance.

2. Collect copays at the point of service. PR-3 copays are fixed and predictable — there is no reason to statement them later. Point-of-service copay collection is one of the highest-ROI front-desk habits.

3. Gate statements on group code and patient category. Only PR amounts reach the patient statement, and Medicaid/QMB/No Surprises Act patients are automatically suppressed. This single gate prevents the most common compliance failure — balance billing a protected patient.

4. Itemize the statement clearly. Show billed, allowed, insurance paid, and patient responsibility broken out by deductible / coinsurance / copay so the patient can reconcile against their own EOB. Statements patients understand get paid; confusing ones generate calls and disputes.

5. Reconcile coinsurance to the allowed amount. Bill the exact PR-2 figure from the ERA — never a percentage of the billed charge. Overbilling coinsurance triggers refunds and erodes trust.

6. Follow up early and consistently. Patient A/R collected within 30 days is worth far more than the same balance at 90+ days. A defined statement cadence with payment-plan options recovers materially more than a single statement and a write-off.

In our experience, practices that collect copays at check-in, verify deductibles before the visit, and gate statements on group code and patient category capture the large majority of their legitimate PR balances while staying clear of balance-billing complaints. If the front desk and billing team do not have the bandwidth to run this loop, outsourced patient billing and collections services can own statement generation, compliance gating, and patient A/R follow-up end to end.