N634Remark Code (RARC)Active
Effective 07/15/2013

N634 Remark Code - Anesthesia Time Units Explained

The N634 remark code indicates that the payment allowance for the claim has been determined using anesthesia time units. This means that the total reimbursement is influenced by the amount of time anesthesia was administered during the procedure.

How It Relates to the Denial

The N634 remark code typically accompanies adjustment reason codes that relate to anesthesia services. Together, they clarify how the payment was calculated based on the specific details of the anesthesia time used.

Common Scenarios

1A claim for an anesthesia service was submitted for a surgical procedure, and the remittance shows a reduced payment amount with an adjustment reason code indicating a payment reduction.
→ The N634 remark code explains that the reduced payment is based on the calculation of anesthesia time units, which directly affects the payment allowance.
2A provider billed for anesthesia services during a lengthy surgery, but the payment was less than expected, along with a reason code for adjustment.
→ The presence of the N634 remark code indicates that the allowance was specifically calculated using the total anesthesia time units, which may differ from initial expectations.
3After submitting a claim for anesthesia, the provider received a remittance that included an adjustment for the billed amount, accompanied by the N634 remark code.
→ This remark informs the provider that the payment reduction is due to the calculation of the anesthesia time units, highlighting the method of allowance determination.

What to Do

  1. Review the anesthesia time units documented in the claim to ensure accuracy
  2. Confirm that the billed anesthesia time aligns with the procedure performed
  3. Evaluate the payment adjustment against your expected reimbursement based on anesthesia time units

What to Check

  • The claim documentation showing the total anesthesia time units billed
  • The payer's policy on anesthesia reimbursement and time unit calculations
  • The adjustment reason code accompanying the N634 remark for additional context