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Official Description

Intra-operative epicardial and endocardial pacing and mapping to localize the site of tachycardia or zone of slow conduction for surgical correction

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The procedure described by CPT® Code 93631 involves intra-operative epicardial and endocardial pacing and mapping, which is a critical step in the surgical management of tachycardia. This procedure is performed during an open heart surgery, where the physician aims to identify the specific site of tachycardia or the zone of slow conduction that requires surgical correction. The process begins with the placement of electrodes on the surface of the heart and within the heart chambers, allowing for direct interaction with the cardiac tissue. The physician then induces or attempts to induce the arrhythmia by applying pacing at various rates or through programmed stimulation, which involves delivering timed electrical impulses to the heart. During this phase, catheters that are inserted into the heart may be repositioned to optimize the mapping and pacing process. The physician conducts pacing or programmed stimulation at multiple sites within the heart to gather comprehensive data on the arrhythmia. The mapping techniques employed can be either standard or three-dimensional (3D). Standard mapping involves sequential recordings from different points within the heart, creating a detailed map of the tachycardia sites based on these recordings. In contrast, 3D mapping utilizes simultaneous recordings from multiple electrodes on a single catheter, which are then processed through computer reconstruction to visualize the tachycardia sequence in three dimensions. This advanced mapping technique enhances the accuracy of identifying the arrhythmia's origin and understanding its electrical pathways. At the conclusion of the mapping procedure, the physician interprets all recordings, pacing, and mapping data, culminating in a comprehensive written report that details the findings and guides the subsequent surgical intervention.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The procedure described by CPT® Code 93631 is indicated for the following conditions:

  • Tachycardia - The procedure is performed to localize the site of tachycardia, which is an abnormally fast heart rate that can lead to various complications if not addressed.
  • Zone of Slow Conduction - It is also indicated for identifying areas of slow conduction within the heart that may contribute to arrhythmias, necessitating surgical correction.

2. Procedure

The procedure involves several critical steps to ensure accurate localization of the tachycardia site or zone of slow conduction:

  • Electrode Placement - Initially, electrodes are strategically placed on the epicardial surface of the heart and within the endocardial chambers. This placement is essential for effective pacing and mapping of the heart's electrical activity.
  • Induction of Arrhythmia - The physician then induces or attempts to induce the arrhythmia by applying pacing at various rates or through programmed stimulation. This step is crucial for observing the heart's response and identifying the arrhythmia's characteristics.
  • Repositioning of Catheters - During the induction of arrhythmia, catheters may be repositioned within the heart to optimize the mapping process. This flexibility allows for targeted pacing and recording from multiple sites.
  • Standard Mapping - Standard mapping is performed using a sequential technique where electrode-mounted catheters are moved from one point to another within the heart. Sequential recordings are taken from each site to construct a comprehensive map of the tachycardia sites.
  • 3D Mapping - In addition to standard mapping, 3D mapping may be utilized. This involves obtaining simultaneous recordings from multiple electrodes on the same catheter, which are then processed through computer reconstruction to create a three-dimensional representation of the tachycardia sequence.
  • Additional Recordings - As needed, further recordings are obtained to confirm the origin of the arrhythmia, study additional arrhythmias, and gather data at the conclusion of the mapping procedure.
  • Interpretation and Reporting - Finally, the physician interprets all recordings, pacing, and mapping procedures, culminating in a detailed written report that outlines the findings and informs the surgical correction.

3. Post-Procedure

Post-procedure care following the intra-operative epicardial and endocardial pacing and mapping involves monitoring the patient for any immediate complications related to the procedure. The physician will review the findings from the mapping and pacing to guide the surgical intervention. Recovery may vary based on the complexity of the surgery performed following the mapping, and the patient will be observed for any signs of arrhythmia or other cardiac issues. Documentation of the procedure and its outcomes is essential for ensuring continuity of care and for any necessary follow-up evaluations.

Short Descr NTRAOP EPICAR&ENDCAR PAC&MAP
Medium Descr INTRAOP EPICAR& ENDOCAR PACG& MAPG
Long Descr Intra-operative epicardial and endocardial pacing and mapping to localize the site of tachycardia or zone of slow conduction for surgical correction
Status Code Carriers Price the Code
Global Days 000 - Endoscopic or Minor Procedure
PC/TC Indicator (26, TC) 1 - Diagnostic Tests for Radiology Services
Multiple Procedures (51) 0 - No payment adjustment rules for multiple procedures apply.
Bilateral Surgery (50) 0 - 150% payment adjustment for bilateral procedures does NOT apply.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 0 - Payment restriction for assistants at surgery applies to this procedure...
Co-Surgeons (62) 0 - Co-surgeons not permitted for this procedure.
Team Surgery (66) 0 - Team surgeons not permitted for this procedure.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Items and Services Packaged into APC Rates
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P2F - Major procedure, cardiovascular-Other
MUE 1
CCS Clinical Classification 62 - Other diagnostic cardiovascular procedures
26 Professional component: certain procedures are a combination of a physician or other qualified health care professional component and a technical component. when the physician or other qualified health care professional component is reported separately, the service may be identified by adding modifier 26 to the usual procedure number.
58 Staged or related procedure or service by the same physician or other qualified health care professional during the postoperative period: it may be necessary to indicate that the performance of a procedure or service during the postoperative period was: (a) planned or anticipated (staged); (b) more extensive than the original procedure; or (c) for therapy following a surgical procedure. this circumstance may be reported by adding modifier 58 to the staged or related procedure. note: for treatment of a problem that requires a return to the operating/procedure room (eg, unanticipated clinical condition), see modifier 78.
59 Distinct procedural service: under certain circumstances, it may be necessary to indicate that a procedure or service was distinct or independent from other non-e/m services performed on the same day. modifier 59 is used to identify procedures/services, other than e/m services, that are not normally reported together, but are appropriate under the circumstances. documentation must support a different session, different procedure or surgery, different site or organ system, separate incision/excision, separate lesion, or separate injury (or area of injury in extensive injuries) not ordinarily encountered or performed on the same day by the same individual. however, when another already established modifier is appropriate it should be used rather than modifier 59. only if no more descriptive modifier is available, and the use of modifier 59 best explains the circumstances, should modifier 59 be used. note: modifier 59 should not be appended to an e/m service. to report a separate and distinct e/m service with a non-e/m service performed on the same date, see modifier 25.
GC This service has been performed in part by a resident under the direction of a teaching physician
XU Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service
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Notes
2025-01-01 Changed Short Description changed.
2013-01-01 Changed Medium Descriptor changed. Guideline information changed.
2011-01-01 Changed Short description changed.
1990-01-01 Added First appearance in code book in 1990.
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