RARC N428: Service Not Covered at This Place of Service
The service is not covered at the place of service listed on the claim — verify the place of service code is correct, and if it is, check whether the payer covers the service in an alternative setting.
What Does RARC N428 Mean?
RARC N428 indicates that the payer restricts coverage of the billed service to specific settings, and the place of service (POS) code on the claim does not match any of the approved locations. Payers frequently limit where certain procedures can be performed based on safety requirements, cost considerations, and clinical appropriateness. A service that is covered in an ambulatory surgical center might not be covered in an office setting, or vice versa.
The most common trigger for N428 is an incorrect POS code on the claim rather than an actual site-of-service problem. The service may have been performed in an approved setting, but the wrong POS code was selected during billing. POS codes (such as 11 for office, 22 for outpatient hospital, 24 for ambulatory surgical center) must accurately reflect where the service took place, and errors in this field are common.
However, N428 can also reflect a genuine coverage restriction. Some payers are moving procedures from higher-cost settings (like hospital outpatient) to lower-cost settings (like ambulatory surgical centers or offices) and will deny claims for services performed in settings they no longer approve. These site-of-service policies are becoming more common as payers seek to reduce costs.
What to Do
First, verify that the POS code on the claim accurately reflects where the service was actually performed. If the code is wrong — for example, POS 11 (office) was entered when the service was performed at POS 22 (outpatient hospital) — correct it and resubmit. This is the most common fix for N428.
If the POS code is correct and the service was genuinely performed in the listed setting, review the payer's policy for approved sites of service. Contact the payer's provider services to ask which POS codes are acceptable for this procedure. If the payer has moved the service to a site-of-service restriction list, future patients may need to be scheduled at an approved facility. For the current claim, check if a medical necessity exception can be obtained by documenting why the service needed to be performed in the specific setting.
Common Scenarios
- A minor surgical procedure is billed from a physician's office (POS 11) but the payer only covers it in an ambulatory surgical center (POS 24) or hospital outpatient (POS 22)
- The billing software defaults to POS 11 for all claims, but the provider performed the service at an outpatient facility and the POS code was not updated
- An infusion service is denied at the office setting because the payer's policy requires it to be administered in a hospital outpatient department for the specific drug
- A diagnostic test is performed at an independent lab (POS 81) but the payer only covers it when ordered and performed in a physician's office or hospital setting
Commonly Paired With
No common pairings documented yet.