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Official Description

Magnetic resonance (eg, proton) imaging, temporomandibular joint(s)

© Copyright 2026 American Medical Association. All rights reserved.

Common Language Description

Magnetic resonance imaging (MRI) of the temporomandibular joint (TMJ) is a specialized imaging procedure that utilizes the principles of magnetic resonance to visualize the internal structures of the TMJ. This noninvasive technique does not involve ionizing radiation, making it a safer alternative for patients requiring detailed imaging of this area. 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 MRI machine causes hydrogen atoms, which are abundant in the body, to align in a specific direction. Following this alignment, radiowaves are emitted, prompting the hydrogen atoms to emit signals that are captured and processed by a computer. This results in high-resolution, three-dimensional images that provide critical insights into the condition of the TMJ. MRI is particularly effective in diagnosing various TMJ disorders, including internal derangements, degeneration or displacement of the meniscus, and other related conditions such as effusions, failed implants, vascular necrosis, tendinitis, muscle atrophy, and soft tissue lesions. The detailed images produced by MRI are invaluable for healthcare professionals in assessing and planning appropriate treatment for TMJ-related issues.

© Copyright 2026 Coding Ahead. All rights reserved.

1. Indications

Magnetic resonance imaging of the temporomandibular joint (TMJ) is indicated for a variety of clinical conditions and symptoms that may affect the joint and surrounding structures. The following are the explicitly provided indications for performing this imaging procedure:

  • Internal Derangement - MRI is utilized to assess the internal structures of the TMJ for any abnormalities, including dislocations or malpositions of the articular disc.
  • Meniscus Degeneration or Displacement - The procedure helps in evaluating the condition of the meniscus, including any degeneration or displacement that may be contributing to TMJ dysfunction.
  • TMJ Effusions - MRI can identify the presence of excess fluid within the joint space, which may indicate inflammation or other pathological processes.
  • Failed Implants - In cases where TMJ implants have been placed, MRI can be used to assess the integrity and function of these implants.
  • Vascular Necrosis - The imaging technique is effective in detecting areas of bone that may be suffering from vascular necrosis, which can lead to joint pain and dysfunction.
  • Tendinitis - MRI can help visualize inflammation of the tendons associated with the TMJ, providing insight into potential causes of pain.
  • Muscle Atrophy - The procedure can reveal any atrophy of the muscles surrounding the TMJ, which may affect joint function.
  • Soft Tissue Lesions - MRI is capable of identifying various soft tissue lesions, contusions, and hematomas that may be present in the TMJ area.

2. Procedure

The procedure for magnetic resonance imaging of the temporomandibular joint (TMJ) involves several key steps to ensure accurate imaging and patient safety. The following outlines the procedural steps:

  • Step 1: Patient Preparation - The patient is first prepared for the MRI by removing any metal objects, including jewelry, watches, and hairpins, as these can interfere with the magnetic field. The patient may be asked to change into a gown for the procedure.
  • Step 2: Positioning - The patient is then positioned on a motorized table that is designed to slide into the MRI scanner. Proper positioning is crucial to ensure that the TMJ is adequately imaged. The patient's head is typically stabilized to minimize movement during the scan.
  • Step 3: Scanning - Once the patient is in position, the MRI technician will initiate the scanning process. The MRI machine generates a strong magnetic field and sends radiowaves through the area of interest. The patient may hear loud tapping or thumping noises during the scan, which is normal.
  • Step 4: Image Acquisition - The MRI machine captures multiple images of the TMJ from various angles. These images are processed by the computer to create detailed, high-resolution tomographic images that can be analyzed by a radiologist.
  • Step 5: Completion - After the imaging is complete, the patient is carefully removed from the scanner. The technician will ensure that the patient is stable and comfortable before they leave the imaging area.

3. Post-Procedure

After the magnetic resonance imaging of the temporomandibular joint (TMJ) is completed, there are generally no specific post-procedure care requirements, as the MRI is a noninvasive procedure. Patients can typically resume their normal activities immediately following the scan. However, it is advisable for patients to wait for the radiologist's report, which will provide detailed findings and interpretations of the images obtained. If any sedation was used during the procedure, patients may need to arrange for transportation home, as they may experience drowsiness. Additionally, patients should follow any specific instructions provided by their healthcare provider regarding follow-up appointments or further evaluations based on the MRI results.

Short Descr MAGNETIC IMAGE JAW JOINT
Medium Descr MRI TEMPOROMANDIBULAR JOINT
Long Descr Magnetic resonance (eg, proton) imaging, temporomandibular joint(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) 2 - 150% payment adjustment 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) I2D - Advanced imaging - MRI/MRA: other
MUE 1
CCS Clinical Classification 198 - Magnetic resonance imaging
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
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
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
GC This service has been performed in part by a resident under the direction of a teaching physician
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.
AQ Physician providing a service in an unlisted health professional shortage area (hpsa)
CR Catastrophe/disaster related
GA Waiver of liability statement issued as required by payer policy, individual case
GW Service not related to the hospice patient's terminal condition
GY Item or service statutorily excluded, does not meet the definition of any medicare benefit or, for non-medicare insurers, is not a contract benefit
LT Left side (used to identify procedures performed on the left side of the body)
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
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
RT Right side (used to identify procedures performed on the right side of the body)
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
Date
Action
Notes
2011-01-01 Changed Short description changed.
2001-01-01 Changed Code description changed.
Pre-1990 Added Code added.
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