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Official Description

Magnetic resonance (eg, proton) imaging, spinal canal and contents, lumbar; with contrast material(s)

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

Magnetic resonance imaging (MRI) is a sophisticated imaging technique utilized to visualize the lumbar spinal canal and its contents. This noninvasive procedure employs the magnetic properties of hydrogen nuclei present in the body, allowing for detailed imaging without the use of ionizing radiation. During the MRI process, a powerful magnetic field is generated, which causes the hydrogen atoms in the body to align with the magnetic field. Subsequently, radiowaves are transmitted into this magnetic field, prompting the protons within 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 patient undergoing this procedure is positioned on a motorized table that moves into a large MRI scanner, often referred to as a tunnel. MRI scans of the lumbar spine are typically indicated when conservative treatments for back pain have failed, prompting the need for further investigation or consideration of more invasive treatment options. In the case of CPT® Code 72149, the procedure involves the administration of contrast material, which enhances the visibility of the spinal structures and allows for a more detailed assessment of potential abnormalities. This contrast medium aids in identifying issues such as abnormal spinal alignment, diseases or injuries affecting the vertebral bodies, intervertebral disc conditions, and any changes that may have occurred post-surgery. The physician analyzes the resulting images to correlate findings with the patient's symptoms, ensuring a comprehensive evaluation of the lumbar spine's health.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

Magnetic resonance imaging (MRI) of the lumbar spinal canal and contents is performed for various clinical indications, particularly when conservative treatment options for back pain have proven ineffective. The following conditions may warrant the use of this imaging technique:

  • Back Pain Persistent back pain that does not respond to conservative management may necessitate further investigation to identify underlying causes.
  • Abnormal Spinal Alignment Assessment of any deviations in spinal alignment that could contribute to pain or neurological symptoms.
  • Vertebral Body Disease or Injury Evaluation of potential diseases or injuries affecting the vertebral bodies, which may include fractures or infections.
  • Intervertebral Disc Conditions Investigation of intervertebral disc herniation, degeneration, or dehydration that may be causing nerve compression or pain.
  • Spinal Canal Size Measurement of the spinal canal's dimensions to determine if it can adequately accommodate the spinal cord and nerve roots.
  • Nerve Compression Identification of pinched or inflamed nerves that may be contributing to pain or neurological deficits.
  • Post-Surgical Changes Monitoring for any changes in the spinal anatomy following surgical interventions.

2. Procedure

The procedure for conducting a magnetic resonance imaging (MRI) scan of the lumbar spinal canal and contents with contrast material involves several key steps, ensuring that the imaging is both effective and safe for the patient.

  • Patient Preparation Prior to the MRI, the patient is informed about the procedure and any necessary preparations, such as removing metal objects and changing into a gown. The healthcare provider may also assess the patient's medical history to ensure that there are no contraindications to the use of contrast material.
  • Administration of Contrast Material Once the patient is positioned on the motorized table, a contrast dye is administered, typically through an intravenous (IV) line. This contrast agent enhances the visibility of the spinal structures during imaging, allowing for a clearer assessment of potential abnormalities.
  • Positioning in the MRI Scanner The patient is then carefully positioned within the MRI scanner, which is a large, cylindrical machine that contains a powerful magnet. The motorized table moves the patient into the scanner, ensuring that the lumbar region is centered within the magnetic field.
  • Imaging Process The MRI machine is activated, and the powerful magnetic field, along with the radiowaves, begins to generate images of the lumbar spinal canal and its contents. The patient may be instructed to remain still during the imaging process to ensure high-quality images are obtained.
  • Image Acquisition The MRI scan captures multiple images in various planes, providing detailed cross-sectional views of the lumbar spine. The computer processes the emitted radiofrequency signals to create high-resolution images that can be analyzed by the physician.
  • Completion of the Procedure After the imaging is complete, the patient is carefully removed from the scanner. The healthcare team will monitor the patient for any immediate reactions to the contrast material before allowing them to resume normal activities.

3. Post-Procedure

Following the MRI procedure, patients are typically monitored for a short period to ensure there are no adverse reactions to the contrast material. It is common for patients to experience no side effects, but they may be advised to drink plenty of fluids to help flush the contrast dye from their system. The physician will review the images obtained during the MRI and discuss the findings with the patient in a follow-up appointment. Depending on the results, further diagnostic tests or treatment options may be recommended to address any identified issues related to the lumbar spine.

Short Descr MRI LUMBAR SPINE W/DYE
Medium Descr MRI SPINAL CANAL LUMBAR W/CONTRAST MATERIAL
Long Descr Magnetic resonance (eg, proton) imaging, spinal canal and contents, lumbar; 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.
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
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).
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
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
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).
53 Discontinued procedure: under certain circumstances, the physician or other qualified health care professional may elect to terminate a surgical or diagnostic procedure. due to extenuating circumstances or those that threaten the well being of the patient, it may be necessary to indicate that a surgical or diagnostic procedure was started but discontinued. this circumstance may be reported by adding modifier 53 to the code reported by the individual for the discontinued procedure. note: this modifier is not used to report the elective cancellation of a procedure prior to the patient's anesthesia induction and/or surgical preparation in the operating suite. for outpatient hospital/ambulatory surgery center (asc) 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.
AQ Physician providing a service in an unlisted health professional shortage area (hpsa)
CC Procedure code change (use 'cc' when the procedure code submitted was changed either for administrative reasons or because an incorrect code was filed)
CR Catastrophe/disaster related
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
GW Service not related to the hospice patient's terminal condition
GX Notice of liability issued, voluntary under payer policy
GZ Item or service expected to be denied as not reasonable and necessary
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
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
ME The order for this service adheres to appropriate use criteria in the clinical decision support mechanism consulted by the ordering 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
Q1 Routine clinical service provided in a clinical research study that is in an approved clinical research study
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
QQ Ordering professional consulted a qualified clinical decision support mechanism for this service and the related data was provided to the furnishing professional
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 Note Guidelines changed.
1990-01-01 Added First appearance in code book in 1990.
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