© Copyright 2025 American Medical Association. All rights reserved.
Electro-oculography (EOG) is a specialized diagnostic test utilized to assess the functionality of the retinal pigment epithelium (RPE) within the eye. The RPE is a crucial layer of pigmented cells situated just outside the retina, positioned between the vascular choroid layer and the light-sensitive outer segments of the photoreceptors. This layer, along with the photoreceptors, plays an essential role in maintaining visual function by supporting the health and performance of the retina. The EOG procedure involves measuring the electrical potential changes across the RPE as the eye transitions between dark and light environments. During the test, the patient's pupils are dilated to enhance the accuracy of the readings. Electrodes are strategically placed on the skin, typically on the medial and lateral sides of the eye, to capture the electrical activity. The patient is then positioned in a head and chin rest within a full-field dome that features two red fixation lights, which are used to guide the patient's eye movements. The test consists of two phases: the dark phase and the light phase, each lasting 15 minutes. In the dark phase, the dome is set to complete darkness, and the fixation lights are alternately activated, prompting the patient to shift their gaze from one light to the other while recordings are taken. The light phase follows, where background lights are turned on, and the same alternating fixation light procedure is repeated. The EOG recordings are analyzed to evaluate the eye's adaptation to dark and light conditions, with specific parameters calculated to provide a comprehensive report of the findings, including the Arden ratio, dark trough amplitude, and light peak timing.
© Copyright 2025 Coding Ahead. All rights reserved.
The electro-oculography (EOG) procedure is indicated for the evaluation of the function of the retinal pigment epithelium (RPE) in various clinical scenarios. The following conditions may warrant the use of EOG:
The electro-oculography procedure consists of several detailed steps to ensure accurate measurement of the electrical potentials across the retinal pigment epithelium. The following steps outline the procedure:
After the electro-oculography procedure, the patient may be monitored briefly to ensure there are no immediate adverse effects from the test. A written report detailing the findings, including the calculated parameters and any observed adaptations, is generated for review by the healthcare provider. Patients may resume normal activities following the procedure, but they should be informed about any specific follow-up appointments or additional tests that may be necessary based on the results of the EOG.
| Short Descr | ELECTRO-OCULOGRAPHY W/I&R | Medium Descr | ELECTRO-OCULOGRAPY W/INTERPRETATION & REPORT | Long Descr | Electro-oculography with interpretation and report | 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) | 7 - Special payment adjustment rules on the technical component (TC) of multiple diagnostic ophthalmology services 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 | STV-Packaged Codes | Type of Service (TOS) | Q - Vision Items or Services | Berenson-Eggers TOS (BETOS) | M5C - Specialist - ophthalmology | MUE | 1 | CCS Clinical Classification | 220 - Ophthalmologic and otologic diagnosis and treatment |
| 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. | 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. | 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. | GC | This service has been performed in part by a resident under the direction of a teaching 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 |
|
Date
|
Action
|
Notes
|
|---|---|---|
| 2024-01-01 | Changed | Short Description changed. |
| Pre-1990 | Added | Code added. |
Get instant expert-level medical coding assistance.