Denial Code PR-45
Charge exceeds fee schedule/maximum allowable or contracted/legislated fee arrangement.
Source: X12 Claim Adjustment Reason Codes (CARC) & Group Codes. Maintained by the D3rx Clinical Billing Team.
What PR-45 means
The billed charge exceeded the allowed amount, and under the PR group code the excess is the patient's responsibility — which generally happens only with non-participating providers where balance billing is permitted.
Why PR-45 happens
- A non-participating provider where the patient is responsible for the balance above the allowed amount
- An out-of-network service where balance billing applies (subject to legal limits)
- A charge above a legislated/negotiated allowable with patient liability for the difference
- A plan design that shifts the over-allowable difference to the patient
What to do when you get PR-45
- 1Confirm the provider is non-participating for this plan (for a PAR provider this should be CO-45, a write-off)
- 2Verify balance billing is legally permitted — check Medicare limiting-charge rules and the No Surprises Act for protected services
- 3Confirm the PR-45 amount equals the charge minus the allowed amount
- 4Bill the patient only for the legally collectible balance, after appropriate notice
Got this denial right now?
Generate a patient-balance explainer letter — free
PR-45 is the patient's responsibility. Generate a clear, plain-English balance letter — free, no signup.
PR group code: who absorbs the charge
Patient Responsibility — May be billed to the patient.
A PR adjustment is the patient's liability — a deductible, coinsurance, copay, or a non-covered amount the patient owes. It is collectible directly from the patient, ideally after advance notice for any non-covered service.
Appeal, correct, or write off PR-45?
PR-45 is generally not an appeal — it's the over-allowable balance assigned to the patient for a non-par/out-of-network service. The real diligence is legal: confirm balance billing is allowed at all. Medicare limiting charges cap what non-par providers may collect, and the No Surprises Act bars balance billing for many emergency and certain in-network-facility services. If the provider is actually participating, this should be a CO-45 write-off, not a patient bill.
Timing & deadlines
No payer filing deadline applies to a legitimate PR balance. If you believe it should have been CO-45 (par provider), pursue a payment-reconsideration within the payer's window (commonly ~90-180 days from the remittance).
Example
A non-participating provider bills above the plan's allowed amount, and the remittance reports PR-45 for the difference. Where balance billing is permitted (and within any limiting charge), the patient is responsible for that difference; for a participating provider the same situation would be a CO-45 write-off.
Prevent PR-45 going forward
- Know your participation status with each payer and how it affects patient liability
- Apply Medicare limiting charges and No Surprises Act protections before billing a balance
- Give patients advance, written notice of expected out-of-network balances
- Distinguish CO-45 (write-off) from PR-45 (patient balance) in your posting rules
Code families most affected
- Non-participating/out-of-network services
- Services priced to a legislated or negotiated allowable
- Balance-billing-eligible claims (subject to legal limits)
Related codes
Payer notes
CARC 45 carries CO or PR 'depending upon liability': CO-45 is the participating-provider contractual write-off; PR-45 shifts the over-allowable difference to the patient, which is lawful only for non-par/out-of-network situations within limiting-charge and surprise-billing rules.
Explain this PR-45 balance to your patient
PR-45 is a patient-responsibility balance. D3rx drafts a clear, plain-English patient-balance explainer for PR-45 — free, no signup.
Medical billing disclaimer
CARC/RARC definitions are the standardized X12 set; group-code semantics follow the X12 Claim Adjustment Group Code standard. Filing and appeal windows vary by payer — the standard anchors shown (Medicare redetermination 120 days from the remittance; Medicare timely filing 12 months from date of service; most commercial payers ~90-180 days) are general references, not a guarantee for any specific plan. Always confirm the rule in the payer's provider manual before acting. D3rx is not responsible for claim outcomes.