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Short-latency somatosensory evoked potential (SEP) studies are diagnostic procedures that assess the functionality of the somatosensory pathways in the central nervous system by measuring the electrical signals generated in response to sensory stimuli. These signals are produced by afferent peripheral nerve fibers when they are stimulated. The short-latency SEPs specifically refer to the initial part of the SEP waveform that occurs within a brief time frame following stimulation, typically within 25 milliseconds for upper extremity nerves. This rapid response time is crucial for evaluating the integrity of the sensory pathways. The procedure involves applying electrical stimulation to selected peripheral nerves or skin sites, with electrodes strategically placed to capture the resulting electrical activity. The data collected during the study is essential for identifying any dysfunction within the somatosensory pathways, which can indicate various neurological conditions. The physician interprets the recorded SEPs and compiles a comprehensive report detailing the findings, which aids in the diagnosis and management of the patient's condition.
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Short-latency somatosensory evoked potential studies are performed for various clinical indications, particularly when there is a need to evaluate the integrity of the somatosensory pathways. The following conditions may warrant this procedure:
The short-latency somatosensory evoked potential study involves several key procedural steps to ensure accurate measurement and recording of the electrical signals generated by peripheral nerve stimulation. The following steps outline the procedure:
After the short-latency somatosensory evoked potential study, patients may resume their normal activities immediately, as the procedure is non-invasive and typically does not require any recovery time. The physician will discuss the results with the patient during a follow-up appointment, providing insights into the findings and any necessary next steps for diagnosis or treatment. It is important for patients to report any unusual symptoms or discomfort following the procedure, although such occurrences are rare. The written report generated from the study will be used to guide further clinical decision-making and management of the patient's condition.
| Short Descr | SOMATOSENSORY TESTING | Medium Descr | SHORT-LATENCY SOMATOSENS EP STD UPR LIMBS | Long Descr | Short-latency somatosensory evoked potential study, stimulation of any/all peripheral nerves or skin sites, recording from the central nervous system; in upper 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) |
| 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. | XE | Separate encounter, a service that is distinct because it occurred during a separate encounter | 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. | GZ | Item or service expected to be denied as not reasonable and necessary | XU | Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service | 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). | GV | Attending physician not employed or paid under arrangement by the patient's hospice provider | 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). | 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. | 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 | 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 | Q0 | Investigational clinical service provided in a clinical research study that is in an approved clinical research study | Q1 | Routine clinical service provided in a clinical research study that is in an approved clinical research study | SA | Nurse practitioner rendering service in collaboration with a physician | 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 | X4 | Episodic/focused services: for reporting services by clinicians who provide focused care on particular types of treatment limited to a defined period and circumstance; the patient has a problem, acute or chronic, that will be treated with surgery, radiation, or some other type of generally time-limited intervention; reporting clinician service examples include but are not limited to, the orthopedic surgeon performing a knee replacement and seeing the patient through the postoperative period | XS | Separate structure, a service that is distinct because it was performed on a separate organ/structure |
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