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Official Description

Magnetic resonance (eg, proton) imaging, chest (eg, for evaluation of hilar and mediastinal lymphadenopathy); with contrast material(s)

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

Magnetic resonance imaging (MRI) of the chest is a sophisticated imaging technique that utilizes the magnetic properties of hydrogen nuclei within the body to create detailed images of the chest area. This noninvasive procedure does not involve ionizing radiation, making it a safer alternative for evaluating various thoracic conditions. During the MRI, a powerful magnetic field is generated, which aligns the hydrogen atoms in the body. Subsequently, radiowaves are transmitted into this magnetic field, causing the protons in the hydrogen nuclei to emit specific radiofrequency signals. These signals are captured by a computer, which processes the data to produce high-resolution tomographic images in three-dimensional slices. The resulting images provide critical insights into the structure and function of the chest, allowing healthcare providers to assess abnormalities such as tumors, lymphadenopathy, and vascular conditions. In the context of CPT® Code 71551, the procedure is enhanced by the use of contrast material, specifically iodine-based dye, which improves the visualization of the chest structures, particularly lymph nodes and blood vessels. This contrast medium aids in the diagnosis of various conditions, including the evaluation of hilar and mediastinal lymphadenopathy, by highlighting areas of concern that may not be as clearly defined without the use of contrast.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The MRI of the chest using contrast material is indicated for several specific clinical scenarios, particularly when detailed visualization of the thoracic structures is required. The following conditions may warrant the use of this imaging technique:

  • Evaluation of Hilar and Mediastinal Lymphadenopathy This procedure is often performed to assess the presence and extent of enlarged lymph nodes in the hilar and mediastinal regions, which can indicate various pathologies, including infections, malignancies, or other diseases.
  • Assessment of Abnormal Growths MRI is utilized to identify and characterize abnormal masses or tumors within the chest, providing essential information for diagnosis and treatment planning.
  • Investigation of Blood Flow The imaging technique can be employed to evaluate blood flow within the thoracic vessels, helping to identify any vascular abnormalities or blockages.
  • Detection of Cancer Spread MRI with contrast is particularly useful in determining whether cancer has metastasized to the chest area, allowing for timely and appropriate management of the disease.

2. Procedure

The procedure for performing an MRI of the chest with contrast involves several key steps to ensure accurate imaging and patient safety. The following outlines the procedural steps:

  • Step 1: Patient Preparation Prior to the MRI, the patient is assessed for any contraindications to the procedure, such as the presence of certain implants or allergies to contrast material. The patient is informed about the procedure, and any necessary pre-procedure instructions are provided, including fasting if required.
  • Step 2: Positioning The patient is positioned on a motorized table that slides into the MRI scanner. It is crucial for the patient to remain still during the imaging process to obtain clear and accurate images. Comfort measures, such as padding and blankets, may be provided to help the patient relax.
  • Step 3: Administration of Contrast Material Once the patient is comfortably positioned, the contrast material, typically an iodine-based dye, is administered intravenously. This step is essential for enhancing the visibility of blood vessels and lymph nodes in the chest.
  • Step 4: Imaging Process The MRI machine is activated, and the powerful magnetic field is generated. Radiowaves are then transmitted, and the protons in the body emit signals that are captured by the MRI system. The imaging sequences are carefully selected based on the clinical indications, and multiple images are taken from various angles to provide comprehensive views of the chest.
  • Step 5: Image Review After the imaging is complete, the physician reviews the acquired images to assess for any abnormalities. The images are processed and analyzed to provide detailed information regarding the structures within the chest.

3. Post-Procedure

After the MRI procedure is completed, the patient is monitored for any immediate reactions to the contrast material, particularly if they have a history of allergies. Generally, patients can resume normal activities shortly after the procedure, as there are no significant recovery requirements associated with MRI. However, patients may be advised to drink plenty of fluids to help flush the contrast material from their system. The physician will discuss the results of the MRI with the patient at a follow-up appointment, where further management or treatment options may be determined based on the findings.

Short Descr MRI CHEST W/DYE
Medium Descr MRI CHEST W/CONTRAST MATERIAL
Long Descr Magnetic resonance (eg, proton) imaging, chest (eg, for evaluation of hilar and mediastinal lymphadenopathy); with contrast material(s)
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 MPFS nonfacility PE RVUs.
Type of Service (TOS) 4 - Diagnostic Radiology
Berenson-Eggers TOS (BETOS) I2D - Advanced imaging - MRI/MRA: other
MUE 1
CCS Clinical Classification 198 - Magnetic resonance imaging

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

0649T Add-on Code MPFS Status: Carrier Priced APC S Quantitative magnetic resonance for analysis of tissue composition (eg, fat, iron, water content), including multiparametric data acquisition, data preparation and transmission, interpretation and report, obtained with diagnostic MRI examination of the same anatomy (eg, organ, gland, tissue, target structure); single organ (List separately in addition to code for primary procedure)
0698T Add-on Code Resequenced Code MPFS Status: Carrier Priced APC S ASC Z2 Quantitative magnetic resonance for analysis of tissue composition (eg, fat, iron, water content), including multiparametric data acquisition, data preparation and transmission, interpretation and report, obtained with diagnostic MRI examination of the same anatomy (eg, organ, gland, tissue, target structure); multiple organs (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).
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).
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.
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.
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.
GA Waiver of liability statement issued as required by payer policy, individual case
GC This service has been performed in part by a resident under the direction of a teaching physician
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
ME The order for this service adheres to appropriate use criteria in the clinical decision support mechanism consulted by the ordering professional
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
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
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
RT Right side (used to identify procedures performed on the right side of the body)
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
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
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
Date
Action
Notes
2001-01-01 Added First appearance in code book in 2001.
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