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Official Description

Computed tomography, thorax, diagnostic; without contrast material, followed by contrast material(s) and further sections

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

Computed tomography (CT) of the thorax is a diagnostic imaging procedure that utilizes advanced X-ray technology to create detailed images of the chest area. This procedure involves the use of multiple, narrow X-ray beams that rotate around a single axis, capturing a series of two-dimensional images from various angles. The primary purpose of this imaging technique is to visualize the thoracic structures, including the lungs, heart, esophagus, soft tissues, and major blood vessels such as the aorta. In the case of CPT® Code 71270, the procedure is performed in two phases: initially, images are obtained without the use of contrast material, followed by the administration of contrast material to enhance the visibility of the structures being examined. The contrast material, typically an iodine-based dye, helps to improve the clarity of the images, allowing for better differentiation of tissues and identification of potential abnormalities. After the images are captured, sophisticated computer software processes the data to reconstruct a three-dimensional representation of the thorax, producing thin, cross-sectional slices that provide a comprehensive view of the targeted area. This imaging technique is crucial for diagnosing various conditions, including infections, lung cancer, pulmonary embolism, aneurysms, and metastatic diseases affecting the chest, as the physician carefully reviews the resulting images for any signs of pathology.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

Computed tomography of the thorax using CPT® Code 71270 is indicated for a variety of clinical scenarios where detailed imaging of the chest is necessary. The following conditions and symptoms may warrant the use of this diagnostic procedure:

  • Infection Suspected infections in the lungs or surrounding tissues, which may require further evaluation to determine the extent and nature of the infection.
  • Lung Cancer Evaluation of potential lung tumors or masses, aiding in the diagnosis and staging of lung cancer.
  • Pulmonary Embolism Assessment for blood clots in the pulmonary arteries, which can be life-threatening and require immediate intervention.
  • Aneurysms Detection and evaluation of aneurysms in the major blood vessels of the chest, such as the aorta, which can pose significant health risks if not monitored or treated.
  • Metastatic Cancer Investigation of metastatic disease that may have spread to the chest from other areas of the body, necessitating a thorough examination of the thoracic structures.

2. Procedure

The procedure for CPT® Code 71270 involves several key steps to ensure accurate imaging of the thorax. The following outlines the procedural steps:

  • Step 1: Patient Preparation The patient is positioned on the CT scanner table, typically lying flat on their back. It is essential to ensure that the patient is comfortable and understands the procedure, including the need to remain still during imaging to avoid motion artifacts.
  • Step 2: Initial Imaging Without Contrast The first phase of the CT scan is conducted without the use of contrast material. This initial imaging captures baseline images of the thorax, allowing the physician to assess the structures and identify any abnormalities that may be present.
  • Step 3: Administration of Contrast Material After the initial images are obtained, contrast material, usually an iodine-based dye, is administered to the patient. This may be done intravenously, and the patient is monitored for any adverse reactions to the contrast agent.
  • Step 4: Further Imaging With Contrast Following the administration of the contrast material, additional images of the thorax are taken. This phase enhances the visibility of the blood vessels and soft tissues, providing a clearer view of any potential issues that may not have been visible in the initial images.
  • Step 5: Image Reconstruction and Review The data collected from both phases of imaging is processed using advanced computer software to reconstruct detailed three-dimensional images of the thorax. The physician then reviews these images to identify any signs of disease or abnormalities.

3. Post-Procedure

After the completion of the CT scan using CPT® Code 71270, the patient may be monitored briefly to ensure there are no immediate adverse reactions to the contrast material. It is common for patients to resume normal activities shortly after the procedure, although they may be advised to drink plenty of fluids to help flush the contrast material from their system. The physician will review the images and provide a report detailing the findings, which will be communicated to the patient and any referring healthcare providers as necessary. Follow-up appointments may be scheduled based on the results of the imaging and any further diagnostic or therapeutic needs that arise from the findings.

Short Descr CT THORAX DX C-/C+
Medium Descr DIAGNOSTIC COMPUTED TOMOGRAPHY THORAX C-/C+
Long Descr Computed tomography, thorax, diagnostic; without contrast material, followed by contrast material(s) and further sections
Status Code Active Code
Global Days XXX - Global Concept Does Not Apply
PC/TC Indicator (26, TC) 1 - Diagnostic Tests for Radiology Services
Multiple Procedures (51) 4 - Special payment adjustment rules on the technical component (TC) of multiple diagnostic imaging 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 88 -
APC Status Indicator Codes That May Be Paid Through a Composite APC
ASC Payment Indicator Radiology service paid separately when provided integral to a surgical procedure on ASC list; payment based on OPPS relative payment weight.
Type of Service (TOS) 4 - Diagnostic Radiology
Berenson-Eggers TOS (BETOS) I2B - Advanced imaging - CAT/CT/CTA: other
MUE 1
CCS Clinical Classification 178 - CT scan chest

This is a primary code that can be used with these additional add-on codes.

0722T Add On Code MPFS Status: Carrier Priced APC S Quantitative computed tomography (CT) tissue characterization, including interpretation and report, obtained with concurrent CT examination of any structure contained in the concurrently acquired diagnostic imaging dataset (List separately in addition to code for primary procedure)
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.
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).
X5 Diagnostic services requested by another clinician: for reporting services by a clinician who furnishes care to the patient only as requested by another clinician or subsequent and related services requested by another clinician; this modifier is reported for patient relationships that may not be adequately captured by the above alternative categories; reporting clinician service examples include but are not limited to, the radiologist's interpretation of an imaging study requested by another clinician
MG The order for this service does not have applicable appropriate use criteria in the qualified clinical decision support mechanism consulted by the ordering professional
TC Technical component; under certain circumstances, a charge may be made for the technical component alone; under those circumstances the technical component charge is identified by adding modifier 'tc' to the usual procedure number; technical component charges are institutional charges and not billed separately by physicians; however, portable x-ray suppliers only bill for technical component and should utilize modifier tc; the charge data from portable x-ray suppliers will then be used to build customary and prevailing profiles
MH Unknown if ordering professional consulted a clinical decision support mechanism for this service, related information was not provided to the furnishing professional or provider
GC This service has been performed in part by a resident under the direction of a teaching physician
Q6 Service furnished under a fee-for-time compensation arrangement by a substitute physician or by a substitute physical therapist furnishing outpatient physical therapy services in a health professional shortage area, a medically underserved area, or a rural area
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.
CT Computed tomography services furnished using equipment that does not meet each of the attributes of the national electrical manufacturers association (nema) xr-29-2013 standard
GA Waiver of liability statement issued as required by payer policy, individual case
ME The order for this service adheres to appropriate use criteria in the clinical decision support mechanism consulted by the ordering professional
77 Repeat procedure by another physician or other qualified health care professional: it may be necessary to indicate that a basic procedure or service was repeated by another physician or other qualified health care professional subsequent to the original procedure or service. this circumstance may be reported by adding modifier 77 to the repeated procedure or service. note: this modifier should not be appended to an e/m service.
Q1 Routine clinical service provided in a clinical research study that is in an approved clinical research study
QQ Ordering professional consulted a qualified clinical decision support mechanism for this service and the related data was provided to the furnishing professional
MF The order for this service does not adhere to the appropriate use criteria in the clinical decision support mechanism consulted by the ordering professional
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
52 Reduced services: under certain circumstances a service or procedure is partially reduced or eliminated at the discretion of the physician or other qualified health care professional. under these circumstances the service provided can be identified by its usual procedure number and the addition of modifier 52, signifying that the service is reduced. this provides a means of reporting reduced services without disturbing the identification of the basic service. note: for hospital outpatient reporting of a previously scheduled procedure/service that is partially reduced or cancelled as a result of extenuating circumstances or those that threaten the well-being of the patient prior to or after administration of anesthesia, see modifiers 73 and 74 (see modifiers approved for asc hospital outpatient use).
76 Repeat procedure or service by same physician or other qualified health care professional: it may be necessary to indicate that a procedure or service was repeated by the same physician or other qualified health care professional subsequent to the original procedure or service. this circumstance may be reported by adding modifier 76 to the repeated procedure or service. note: this modifier should not be appended to an e/m service.
AQ Physician providing a service in an unlisted health professional shortage area (hpsa)
CR Catastrophe/disaster related
ET Emergency services
GQ Via asynchronous telecommunications system
GV Attending physician not employed or paid under arrangement by the patient's hospice provider
GW Service not related to the hospice patient's terminal condition
GZ Item or service expected to be denied as not reasonable and necessary
LT Left side (used to identify procedures performed on the left side of the body)
MA Ordering professional is not required to consult a clinical decision support mechanism due to service being rendered to a patient with a suspected or confirmed emergency medical condition
MB Ordering professional is not required to consult a clinical decision support mechanism due to the significant hardship exception of insufficient internet access
MC Ordering professional is not required to consult a clinical decision support mechanism due to the significant hardship exception of electronic health record or clinical decision support mechanism vendor issues
Q5 Service furnished under a reciprocal billing arrangement by a substitute physician or by a substitute physical therapist furnishing outpatient physical therapy services in a health professional shortage area, a medically underserved area, or a rural area
RT Right side (used to identify procedures performed on the right side of the body)
X4 Episodic/focused services: for reporting services by clinicians who provide focused care on particular types of treatment limited to a defined period and circumstance; the patient has a problem, acute or chronic, that will be treated with surgery, radiation, or some other type of generally time-limited intervention; reporting clinician service examples include but are not limited to, the orthopedic surgeon performing a knee replacement and seeing the patient through the postoperative period
XE Separate encounter, a service that is distinct because it occurred during a separate encounter
XP Separate practitioner, a service that is distinct because it was performed by a different practitioner
XU Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service
Date
Action
Notes
2021-01-01 Changed Code changed.
2013-01-01 Changed Medium Descriptor changed.
2003-01-01 Changed Code description changed.
Pre-1990 Added Code added.
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