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A central motor evoked potential (MEP) study is a diagnostic procedure that assesses the functionality of the motor pathways in the body. Specifically, CPT® Code 95929 pertains to the evaluation of the lower limbs through transcranial motor stimulation. This study involves the application of electrical stimulation to the motor area of the cerebral cortex, which is the region of the brain responsible for voluntary movement. The stimulation is followed by the recording of electrical activity from peripheral muscles located in the lower extremities, such as those in the legs. The primary goal of this procedure is to evaluate the integrity and functionality of the motor pathways that connect the brain to the muscles, thereby providing valuable insights into any potential neurological disorders affecting motor control. Prior to conducting the MEP study, baseline nerve conduction studies are typically performed to establish a reference point for comparison. The procedure is meticulously designed to ensure accurate measurements of motor response, including the amplitude and latency of the evoked potentials, which are critical for diagnosing conditions that may impair motor function.
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The central motor evoked potential study (CPT® Code 95929) is indicated for the evaluation of motor pathway function in the lower extremities. This procedure is typically performed in patients presenting with symptoms or conditions that may affect motor control, including but not limited to:
The procedure for conducting a central motor evoked potential study for the lower limbs involves several detailed steps to ensure accurate assessment of motor pathway function:
After the completion of the central motor evoked potential study, patients may be monitored briefly to ensure there are no immediate adverse effects from the electrical stimulation. Typically, there are no significant post-procedure complications, and patients can resume normal activities shortly after the study. The physician will provide a detailed report of the findings, which may include recommendations for further evaluation or treatment based on the results of the MEP study. Follow-up appointments may be scheduled to discuss the findings and any necessary interventions.
| Short Descr | C MOTOR EVOKED LWR LIMBS | Medium Descr | CTR MOTOR EP STD TRANSCRNL MOTOR STIMJ LWR LIMBS | Long Descr | Central motor evoked potential study (transcranial motor stimulation); lower limbs | 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) | 0 - No payment adjustment rules for multiple 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 | 99 - Concept Does Not Apply | APC Status Indicator | Procedure or Service, Not Discounted when Multiple | Type of Service (TOS) | 1 - Medical Care | Berenson-Eggers TOS (BETOS) | T2D - Other tests - other | MUE | 1 | CCS Clinical Classification | 7 - Other diagnostic nervous system procedures |
This is a primary code that can be used with these additional add-on codes.
| 95940 | Addon Code Resequenced Code MPFS Status: Active Code APC N Continuous intraoperative neurophysiology monitoring in the operating room, one on one monitoring requiring personal attendance, each 15 minutes (List separately in addition to code for primary procedure) | 95941 | Addon Code Resequenced Code MPFS Status: Not valid for Medicare purposes APC N Continuous intraoperative neurophysiology monitoring, from outside the operating room (remote or nearby) or for monitoring of more than one case while in the operating room, per hour (List separately in addition to code for primary procedure) | G0453 | Add-on Code Medicare Coverage: Carrier Priced MPFS Status: Active Code APC N Continuous intraoperative neurophysiology monitoring, from outside the operating room (remote or nearby), per patient, (attention directed exclusively to one patient) each 15 minutes (list in addition to 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. | 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. | GC | This service has been performed in part by a resident under the direction of a teaching physician | GZ | Item or service expected to be denied as not reasonable and necessary | 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 | 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 |
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| 2011-01-01 | Changed | Short description changed. |
| 2005-01-01 | Added | First appearance in code book in 2005. |
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