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The optokinetic nystagmus (OKN) test, identified by CPT® Code 92544, is a specialized diagnostic procedure used to assess eye movement responses to visual stimuli. This test involves bidirectional stimulation, which means that the visual targets move in both rightward and leftward directions. The procedure utilizes foveal or peripheral stimulation, allowing for a comprehensive evaluation of the patient's eye movement capabilities. During the test, recording is conducted using electronystagmography (ENG), a technique that measures and records the electrical activity of the eye muscles. To perform the test, horizontal electrodes are strategically placed on the skin at the inner and outer aspects of each eye. As the patient observes a series of moving targets, which can include stripes on a rotating drum, a stream of lighted dots across a light bar, or a full-field array of moving stars or trees, their eye movements are recorded. The targets are moved at varying speeds, specifically at rates of 300, 400, or 600 feet per second, to elicit a response. The movement of the targets is then reversed, and the procedure is repeated, allowing for a thorough assessment of the eye's response to both directions of movement. The resulting eye movements generated during the test resemble nystagmus, a condition characterized by involuntary eye movement. After the test, the physician reviews the recorded data to evaluate the symmetry of the eye movement responses. An asymmetrical response may indicate potential central nervous system pathology, making this test a valuable tool in diagnosing various neurological conditions. Overall, the optokinetic nystagmus test is an essential procedure for understanding eye movement dynamics and identifying underlying health issues related to the central nervous system.
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The optokinetic nystagmus test is indicated for the evaluation of various conditions related to eye movement and central nervous system function. The following are specific indications for performing this test:
The optokinetic nystagmus test involves several key procedural steps to ensure accurate assessment of eye movements. The following outlines the detailed steps of the procedure:
After the optokinetic nystagmus test, the patient may resume normal activities unless otherwise instructed by the physician. The physician will review the recorded data and discuss the findings with the patient, which may include recommendations for further evaluation or treatment based on the results. It is important for the physician to consider the symmetry of the eye movement responses, as any irregularities may warrant additional diagnostic testing or referrals to specialists for further investigation of potential neurological conditions.
| Short Descr | OPTOKINETIC NYSTAGMUS TEST | Medium Descr | OPTKINETIC NYSTAG BIDIR/FOVEAL/PERIPH STIM W/REC | Long Descr | Optokinetic nystagmus test, bidirectional, foveal or peripheral stimulation, with recording | 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) | 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 | 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 | 220 - Ophthalmologic and otologic diagnosis and treatment |
This is a primary code that can be used with these additional add-on codes.
| 92547 | Addon Code MPFS Status: Active Code APC N CPT Assistant Article Use of vertical electrodes (List separately in addition to code for 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. | GA | Waiver of liability statement issued as required by payer policy, individual case | KX | Requirements specified in the medical policy have been met | 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). | 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 | XE | Separate encounter, a service that is distinct because it occurred during a separate encounter | XS | Separate structure, a service that is distinct because it was performed on a separate organ/structure | 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 | Guideline information changed. |
| Pre-1990 | Added | Code added. |
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