CO-194: Anesthesia by Operating/Assistant/Attending Physician

What Does CO-194 Mean?

CO-194 indicates the payer considers the anesthesia performed by the operating physician, assistant surgeon, or attending physician to be included in the surgical payment under the provider's contract. The anesthesia component is bundled — the provider cannot bill the patient separately for it. This is the standard and most frequent pairing for CARC 194.

CARC 194 appears when a payer determines that anesthesia services were provided by the same physician who performed the surgery, assisted in the surgery, or served as the attending physician — and the payer does not reimburse anesthesia separately in that scenario. The payer considers the anesthesia component to be included in the surgical or procedural payment, not a standalone billable service.

This code is most commonly seen in ambulatory surgery settings or smaller practices where the operating surgeon personally administers local or regional anesthesia rather than involving a separate anesthesiologist or CRNA. While some payers allow separate billing for surgeon-administered anesthesia using modifier 47, others have blanket policies that deny it regardless of modifiers. The key is understanding the specific payer's stance on physician-administered anesthesia before the claim is submitted.

The financial impact of CARC 194 falls primarily on the provider under CO. The payer treats this as a bundling issue — the anesthesia is considered part of the surgical global package. Providers who routinely administer their own anesthesia should verify each payer's policy and ensure their charge capture process correctly handles these scenarios to avoid systematic denials.

Common Causes

How to Resolve

Verify the payer's anesthesia billing policy, apply correct modifiers, and resubmit if separate billing is allowed — otherwise, accept the bundling adjustment.

1. Review the operative report Confirm the anesthesia type and who administered it. Verify this matches what was billed on the claim.
2. Check modifier 47 applicability Look up whether this payer accepts modifier 47 for surgeon-administered anesthesia. If they do and the modifier was missing, correct and resubmit.
3. Contact the payer for policy clarification If the policy is unclear, call the provider relations line and ask specifically whether anesthesia by the surgeon can be billed separately with modifier 47 for the procedure in question.
4. Post as contractual write-off if bundled If the payer confirms that anesthesia by the surgeon is always bundled, write off the denied amount and update your CDM or billing rules to prevent future submissions.

Common RARC Pairings

The RARC code tells you exactly what triggered the CO-194:

How to Prevent CO-194

• Maintain a payer-specific reference sheet documenting which payers accept modifier 47 for surgeon-administered anesthesia
• Configure your charge capture system to flag anesthesia charges billed by the operating surgeon for manual review before submission
• Train billing staff on the distinction between independently billable anesthesia and bundled anesthesia by the surgeon
• Verify the payer's anesthesia billing policy during the credentialing or contract review process

General Prevention

• Verify payer-specific policies on anesthesia billing by the operating or attending physician before submitting claims
• Apply correct modifiers (e.g., modifier 47) when the surgeon personally administers anesthesia
• Document the medical necessity for physician-administered anesthesia clearly in the operative report
• Train billing staff on the distinction between separately billable anesthesia and anesthesia included in the surgical package
• Implement pre-submission claim edits that flag anesthesia charges billed by the operating surgeon for manual review
• Coordinate with anesthesia billing teams to prevent duplicate submissions when the surgeon also provides anesthesia

Also Filed As

The same CARC 194 may appear with different Group Codes:

Related Denial Codes