Digital EEG Spike Analysis
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Defines medical necessity and coding for digital EEG spike analysis (CPT 95957) for members/enrollees of the health plan, specifying the clinical indication and required accompanying services and diagnoses.
In the coding description for 95957, a note was added stating it is performed in conjunction with any of the CPT codes listed below it.
Criteria statements I and II explicitly note that the code in question is 95957 and clarify that 95957 is medically necessary when billed in conjunction with a video EEG code and a diagnosis code in Table 2.
New 2024 ICD-10 codes G40.C11 and G40.C19 were added to the ICD-10 coding table.
Coverage Criteria
Medical Necessity Criteria (Initial / Presurgical Evaluation)
Covered when ALL of the following are met:
See Table 2 for qualifying intractable epilepsy ICD-10 codes and Table 1 for required supporting EEG procedure codes
Video EEG codes are listed with Table 1; 95957 requires accompaniment by the listed EEG CPTs
Digital electroencephalography (EEG) spike analysis, CPT 95957, is considered medically necessary only when performed as part of the pre‑surgical evaluation for members/enrollees with intractable epilepsy and is billed in conjunction with video EEG long‑term monitoring.
Use of CPT 95957 for indications other than pre‑surgical evaluation of intractable epilepsy is considered not medically necessary and is outside the scope of coverage under this policy.
Coding
| 95957 | Digital analysis of electroencephalogram (EEG) (eg, for epileptic spike analysis) |
| 95718 | Procedure code listed in Table 1 (supporting EEG procedures) |
| 95720 | Procedure code listed in Table 1 (supporting EEG procedures) |
| 95722 | Procedure code listed in Table 1 (supporting EEG procedures) |
| 95724 | Procedure code listed in Table 1 (supporting EEG procedures) |
| 95726 | Procedure code listed in Table 1 (supporting EEG procedures) |
| G40.011 | Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, intractable, with status epilepticus |
| G40.019 | Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, intractable, without status epilepticus |
| G40.111 | Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable, with status epilepticus |
| G40.119 | Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable, without status epilepticus |
| G40.211 | Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractable, with status epilepticus |
| G40.219 | Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractable, without status epilepticus |
| G40.311 | Generalized idiopathic epilepsy and epileptic syndromes, intractable, with status epilepticus |
| G40.319 | Generalized idiopathic epilepsy and epileptic syndromes, intractable, without status epilepticus |
| G40.411 | Other generalized epilepsy and epileptic syndromes, intractable, with status epilepticus |
| G40.419 | Other generalized epilepsy and epileptic syndromes, intractable, without status epilepticus |
Provider Actions & Billing
Prior authorization required for CPT 95957
Prior authorization is required/expected when billing CPT 95957 to demonstrate the service is performed for presurgical evaluation in conjunction with an eligible video EEG procedure code and an intractable epilepsy diagnosis from Table 2.
- Prior authorization applies to CPT 95957 (Digital analysis of EEG).
- Must show conjunction with a video EEG code and a qualifying ICD‑10 in Table 2.
Service limited to presurgical evaluation (provider impact)
Digital EEG spike analysis (CPT 95957) is medically necessary only for pre‑surgical evaluation of intractable epilepsy and is not medically necessary for any other indication; billing must reflect this policy stance.
Required clinical documentation of substantial digital analysis
Clinical documentation must demonstrate that substantial additional digital analysis was performed — e.g., quantitative data selection, software processing, and dipole source analysis — and that the service was part of a presurgical evaluation in conjunction with video EEG long‑term monitoring.
- Document the specific quantitative analytic steps performed (data selection, software processing, dipole/source analysis).
- Document that the analysis was performed as part of pre‑surgical evaluation with video EEG long‑term monitoring.
Denial risk for unsupported indications or missing conjunction codes/diagnoses
Claims may be denied if CPT 95957 is not performed as part of presurgical evaluation for intractable epilepsy or if it is not billed in conjunction with an appropriate video EEG procedure code and an intractable epilepsy diagnosis from Table 2.
Background
Digital EEG spike analysis (also described as 3‑D dipole localization or dipole analysis) refers to quantitative processing of digitally recorded EEG spikes, including topographic voltage and/or dipole analysis, to assist localization in the pre‑surgical evaluation of patients with intractable epilepsy. This specialized analytic procedure is distinct from routine EEG recording or automatic spike detection and is intended to be used alongside video EEG long‑term monitoring and other presurgical data.
Definitions
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