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Official Description

Bioimpedance-derived physiologic cardiovascular analysis

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

Bioimpedance-derived physiologic cardiovascular analysis, identified by CPT® Code 93701, is a noninvasive diagnostic procedure that evaluates cardiac physiology. This technique, often referred to as thoracic electrical bioimpedance (TEB), utilizes a method known as plethysmography to assess various cardiovascular parameters. The primary purpose of bioimpedance analysis is to measure critical metrics such as cardiac output, which indicates the volume of blood the heart pumps per minute, and respiration rates. The advanced bioimpedance technology enables the measurement of several key indices, including cardiac index (CI), stroke index (SI), heart and respiratory rates, ventricular ejection time, pre-ejection period, ejection phase contractility index, inotropic state index, estimation of ejection fraction, and end-diastolic index. During the procedure, eight electrodes—four positioned on each side—are strategically placed over the lateral aspects of the neck and chest or upper abdomen. These electrodes are connected to a bioimpedance machine via cables. A low magnitude electrical current is then passed through the thorax, running parallel to the spine between the electrodes located in the neck and upper abdomen. As this current traverses the thorax, it primarily flows through the thoracic aorta and the inferior and superior vena cava, allowing for the collection of electrical signals. The bioimpedance machine records these signals and generates a printed output detailing the various cardiovascular parameters assessed. Subsequently, a physician reviews and interprets the data, culminating in a comprehensive written report of the findings, which aids in the evaluation of the patient's cardiovascular health.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The bioimpedance-derived physiologic cardiovascular analysis is indicated for the evaluation of various cardiovascular conditions and physiological states. The following are the explicitly provided indications for this procedure:

  • Cardiac Output Assessment This procedure is utilized to measure cardiac output, which is essential for understanding heart function and overall cardiovascular health.
  • Respiratory Evaluation It aids in assessing respiratory rates, providing insights into the patient's respiratory function in conjunction with cardiac performance.
  • Cardiac Index Measurement The analysis allows for the determination of cardiac index (CI), which is crucial for evaluating the efficiency of blood flow relative to body surface area.
  • Stroke Index Measurement Stroke index (SI) is measured to assess the volume of blood ejected by the heart with each beat, which is vital for understanding cardiac performance.
  • Ventricular Function Analysis The procedure evaluates ventricular ejection time and pre-ejection period, which are important for assessing the timing and efficiency of heart contractions.
  • Contractility Assessment It provides insights into the ejection phase contractility index and inotropic state index, which are indicators of the heart's contractile strength.
  • Ejection Fraction Estimation The analysis estimates ejection fraction, a key measure of heart function that indicates the percentage of blood pumped out of the ventricles with each heartbeat.
  • End-Diastolic Index Measurement The end-diastolic index is assessed to evaluate the volume of blood in the ventricles at the end of filling, which is important for understanding preload conditions.

2. Procedure

The bioimpedance-derived physiologic cardiovascular analysis involves several procedural steps that ensure accurate measurement and assessment of cardiovascular parameters. The following steps outline the procedure:

  • Electrode Placement Eight electrodes are placed on the patient’s body, with four electrodes positioned on each side of the neck and chest or upper abdomen. This strategic placement is crucial for obtaining accurate readings of the electrical signals as they pass through the thorax.
  • Connection to Bioimpedance Machine The electrodes are connected to a bioimpedance machine via cables. This connection is essential for transmitting the electrical signals generated during the procedure.
  • Current Application A low magnitude electrical current is passed through the thorax, running parallel to the spine between the electrodes located in the neck and upper abdomen. This current is designed to flow through the thoracic aorta and the inferior and superior vena cava, allowing for effective measurement of cardiovascular parameters.
  • Signal Recording As the current travels through the thorax, the bioimpedance machine records the electrical signals that are generated. These signals reflect various cardiovascular metrics and are critical for the subsequent analysis.
  • Data Output Generation The bioimpedance machine produces a printed readout of the recorded parameters, which includes detailed information on cardiac output, heart rate, and other relevant indices.
  • Physician Review and Interpretation A physician reviews the printed output and interprets the findings. This step is vital for understanding the patient's cardiovascular status and for making informed clinical decisions.
  • Report Generation Finally, the physician provides a written report summarizing the findings from the bioimpedance analysis, which can be used for further evaluation and management of the patient’s cardiovascular health.

3. Post-Procedure

After the bioimpedance-derived physiologic cardiovascular analysis is completed, there are typically no specific post-procedure care requirements due to the noninvasive nature of the test. Patients can generally resume their normal activities immediately following the procedure. However, it is essential for the physician to review the findings and discuss any necessary follow-up actions or additional testing that may be warranted based on the results. The written report generated from the analysis serves as a critical tool for ongoing patient management and care.

Short Descr BIOIMPEDANCE CV ANALYSIS
Medium Descr BIOIMPEDANCE-DERIVED PHYSIOLOGIC CV ANALYSIS
Long Descr Bioimpedance-derived physiologic cardiovascular analysis
Status Code Active Code
Global Days XXX - Global Concept Does Not Apply
PC/TC Indicator (26, TC) 3 - Technical Component Only Code
Multiple Procedures (51) 6 - Special payment adjustment rules on the technical component (TC) of multiple diagnostic cardiovascular services 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 STV-Packaged Codes
Type of Service (TOS) 5 - Diagnostic Laboratory
Berenson-Eggers TOS (BETOS) T2D - Other tests - other
MUE 1
CCS Clinical Classification 62 - Other diagnostic cardiovascular procedures
GA Waiver of liability statement issued as required by payer policy, individual case
51 Multiple procedures: when multiple procedures, other than e/m services, physical medicine and rehabilitation services or provision of supplies (eg, vaccines), are performed at the same session by the same individual, the primary procedure or service may be reported as listed. the additional procedure(s) or service(s) may be identified by appending modifier 51 to the additional procedure or service code(s). note: this modifier should not be appended to designated "add-on" codes (see appendix d).
25 Significant, separately identifiable evaluation and management service by the same physician or other qualified health care professional on the same day of the procedure or other service: it may be necessary to indicate that on the day a procedure or service identified by a cpt code was performed, the patient's condition required a significant, separately identifiable e/m service above and beyond the other service provided or beyond the usual preoperative and postoperative care associated with the procedure that was performed. a significant, separately identifiable e/m service is defined or substantiated by documentation that satisfies the relevant criteria for the respective e/m service to be reported (see evaluation and management services guidelines for instructions on determining level of e/m service). the e/m service may be prompted by the symptom or condition for which the procedure and/or service was provided. as such, different diagnoses are not required for reporting of the e/m services on the same date. this circumstance may be reported by adding modifier 25 to the appropriate level of e/m service. note: this modifier is not used to report an e/m service that resulted in a decision to perform surgery. see modifier 57 for significant, separately identifiable non-e/m services, see modifier 59.
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.
93 Synchronous telemedicine service rendered via telephone or other real-time interactive audio-only telecommunications system : synchronous telemedicine service is defined as a real-time interaction between a physician or other qualified health care professional and a patient who is located away at a distant site from the physician or other qualified health care professional. the totality of the communication of information exchanged between the physician or other qualified health care professional and the patient during the course of the synchronous telemedicine service must be of an amount and nature that is sufficient to meet the key components and/or requirements of the same service when rendered via a face-to-face interaction.
95 Synchronous telemedicine service rendered via a real-time interactive audio and video telecommunications system: synchronous telemedicine service is defined as a real-time interaction between a physician or other qualified health care professional and a patient who is located at a distant site from the physician or other qualified health care professional. the totality of the communication of information exchanged between the physician or other qualified health care professional and the patient during the course of the synchronous telemedicine service must be of an amount and nature that would be sufficient to meet the key components and/or requirements of the same service when rendered via a face-to-face interaction. modifier 95 may only be appended to the services listed in appendix p. appendix p is the list of cpt codes for services that are typically performed face-to-face, but may be rendered via a real-time (synchronous) interactive audio and video telecommunications system.
GV Attending physician not employed or paid under arrangement by the patient's hospice provider
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
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 Medium Description spelling changed.
2011-01-01 Changed Medium description changed. Short description changed.
2010-01-01 Changed Code description changed.
2002-01-01 Added First appearance in code book in 2002.
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