CPT 00400: Anesthesia for Chest Wall Procedures
Anesthesia for procedures on the integumentary system on the extremities, anterior trunk and perineum, not otherwise specified.
Why CPT 00400 Claims Get Denied
Claims billed under CPT 00400 are frequently denied or downcoded for the following reasons. Understanding these patterns helps your practice reduce denial rates and recover revenue faster.
Time documentation insufficient
Anesthesia type not justified for the procedure
Missing physical status modifier
Medical direction documentation incomplete
Billing Tips for CPT 00400
For CRNA services with physician supervision, use appropriate medical direction modifiers (QK, QX, QY). Document the anesthesiologist's involvement when supervising CRNAs. Bill time from induction to the point the patient is transferred to post-anesthesia care.
Documentation Requirements
To support a clean claim for CPT 00400, your clinical documentation should include:
Pre-anesthesia assessment and plan
Anesthesia start and stop times
Continuous monitoring documentation
Physical status and qualifying circumstances
Post-anesthesia note
Medical direction documentation if applicable
Common Modifiers for CPT 00400
Reduce CPT 00400 Denials by 60%
RediClaim's pre-submission scrubber catches documentation gaps and coding errors before you submit, while the appeal generator handles denials that slip through.