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Official Description

Magnetic resonance (eg, proton) imaging, lower extremity other than joint; 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 internal structures of the body, particularly the lower extremities, excluding the joints. This noninvasive procedure leverages the magnetic properties of hydrogen atoms present in the body, allowing for detailed imaging without the use of ionizing radiation. During the MRI process, the patient is positioned on a motorized table that moves into a large cylindrical scanner, which houses a powerful magnet. The magnetic field generated by the scanner aligns the hydrogen atoms in the body. Subsequently, radiowaves are emitted within this magnetic field, causing the protons in various tissues to emit specific radiofrequency signals. These signals are captured and processed by a computer, which constructs high-resolution tomographic images in three dimensions. In the case of CPT® Code 73719, the procedure specifically involves the administration of contrast material, typically an iodine-based contrast dye, which is injected intravenously prior to imaging. This contrast agent enhances the visibility of the target area, allowing for improved differentiation of tissues and identification of abnormalities. MRI scans of the lower leg are commonly performed to investigate conditions such as injuries, trauma, or unexplained pain, providing clearer images than other imaging modalities like computed tomography (CT). The resulting images are crucial for diagnosing various conditions, including tendinitis, muscle atrophy, soft tissue and bone lesions, osteomyelitis, contusions, hematomas, and fractures, as well as for evaluating findings that may not be apparent on X-rays or bone scans.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

Magnetic resonance imaging of the lower extremity, specifically CPT® Code 73719, is indicated for a variety of clinical scenarios. The following conditions and symptoms may warrant the use of this imaging technique:

  • Injury or Trauma: MRI is often utilized to assess damage to soft tissues, muscles, and other structures following an injury or trauma to the lower leg.
  • Unexplained Pain: When patients present with persistent or unexplained pain in the lower leg, MRI can help identify underlying causes that may not be visible through other imaging methods.
  • Tendinitis: The procedure is effective in diagnosing tendinitis, which involves inflammation of the tendons in the lower extremity.
  • Muscle Atrophy: MRI can reveal muscle atrophy or other abnormal muscular developments that may contribute to functional impairments.
  • Lesions: The imaging technique is useful for detecting lesions in soft tissue and bone, which may indicate various pathological conditions.
  • Osteomyelitis: MRI is a valuable tool for diagnosing osteomyelitis, an infection of the bone that can lead to significant complications if not addressed.
  • Contusions and Hematomas: The procedure can identify contusions, hematomas, and other masses that may be palpable during a physical examination.
  • Fractures: MRI is also employed to evaluate fractures or other abnormalities that may not be clearly visible on X-rays or bone scans.

2. Procedure

The procedure for CPT® Code 73719 involves several key steps to ensure accurate imaging of the lower extremity. The following outlines the procedural steps:

  • Step 1: Patient Preparation The patient is first prepared for the MRI scan. This includes explaining the procedure, obtaining informed consent, and ensuring that the patient has removed any metallic objects that could interfere with the magnetic field.
  • Step 2: Intravenous Contrast Administration An intravenous line is established, and iodine-based contrast material is administered to enhance the imaging quality. This step is crucial for improving the visibility of the target area.
  • Step 3: Positioning the Patient The patient is then positioned on a motorized table, which is designed to move into the MRI scanner. Proper positioning is essential to ensure that the area of interest is adequately captured during the imaging process.
  • Step 4: Imaging Process Once the patient is positioned, the MRI machine is activated. The powerful magnet creates a strong magnetic field, and radiowaves are transmitted to excite the hydrogen atoms in the tissues of the lower leg. The protons emit radiofrequency signals that are detected by the MRI machine.
  • Step 5: Image Acquisition The signals received are processed by a computer to generate high-resolution, three-dimensional images of the lower extremity. The imaging sequence may vary based on the specific clinical indications and the area being examined.
  • Step 6: Post-Procedure Monitoring After the imaging is complete, the patient is monitored briefly to ensure there are no adverse reactions to the contrast material. The patient may then be discharged with any necessary post-procedure instructions.

3. Post-Procedure

Following the MRI procedure coded as CPT® 73719, patients are typically monitored for a short period to observe for any immediate reactions to the contrast material. It is important to inform patients about potential side effects, although serious reactions are rare. Patients may resume normal activities unless otherwise instructed by their healthcare provider. The images obtained during the MRI will be reviewed by a physician, who will interpret the findings in relation to the patient's clinical symptoms and history. The results will be documented and communicated to the patient, along with any recommended follow-up actions or treatments based on the imaging findings.

Short Descr MRI LOWER EXTREMITY W/DYE
Medium Descr MRI LOWER EXTREM OTH/THN JT W/CONTRAST MATRL
Long Descr Magnetic resonance (eg, proton) imaging, lower extremity other than joint; 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) 3 - The usual 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 2
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.
LT Left side (used to identify procedures performed on the left side of the body)
RT Right side (used to identify procedures performed on the right side of the body)
50 Bilateral procedure: unless otherwise identified in the listings, bilateral procedures that are performed at the same session, should be identified by adding modifier 50 to the appropriate 5 digit code. note: this modifier should not be appended to designated "add-on" codes (see appendix d).
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
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
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
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
Date
Action
Notes
2001-01-01 Added First appearance in code book in 2001.
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