Multiple Sleep Latency Testing (MSLT) Coverage Criteria
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Defines medical necessity criteria, coding, and repeat-testing indications for Multiple Sleep Latency Testing (MSLT) for members/enrollees of the health plan; applies to clinical providers ordering or performing MSLT.
No material clinical or coverage changes in this revision.
Coverage Criteria for MSLT
Repeat MSLT
Repeat MSLT is covered when ALL criteria from Initial MSLT are met AND at least ONE of the following:
Repeat testing requires that all Initial MSLT criteria are met in addition to one of these indications.
The MSLT is not part of the routine evaluation for other sleep disorders and should not be used routinely outside the assessment of suspected narcolepsy or idiopathic hypersomnia. A diagnostic overnight polysomnogram (PSG) must precede the MSLT and that prior-night PSG should not demonstrate significant sleep pathology (for example, obstructive or central sleep apnea) that would invalidate MSLT results.
MSLT for evaluation of sleep complaints other than suspected narcolepsy or idiopathic hypersomnia is not supported by this policy and is considered not medically necessary. The policy specifically excludes routine use of MSLT for other sleep disorders and requires that test use be limited to the indicated diagnostic contexts (suspected narcolepsy or idiopathic hypersomnia) with an appropriate prior-night PSG showing no significant pathology.
Coding, Thresholds, and Test Findings
| 95805 | Multiple sleep latency or maintenance of wakefulness testing, recording, analysis and interpretation of physiological measurements of sleep during multiple trials to assess sleepiness. |
Provider Requirements and Authorization
Prior authorization required for MSLT (CPT 95805)
Prior authorization is required for CPT 95805 (MSLT). The request must include medical necessity documentation showing the member meets all policy criteria (age ≥ 2 years; EDS ≥ 8 weeks with Epworth ≥ 10; prior-night standard PSG planned; suspected narcolepsy or idiopathic hypersomnia; evaluation/treatment of medical contributors; medications noncontributory; psychiatric disorder absent or under care; drug/alcohol misuse excluded).
- Procedure code: 95805
- Age requirement: ≥ 2 years
- EDS duration and score: ≥ 8 weeks and Epworth ≥ 10
- Prior-night standard PSG planned
- Clinical indication: suspected narcolepsy or idiopathic hypersomnia
- Assessment/treatment of medical/psychiatric contributors and medications
Step therapy: Not applicable
No step therapy sequencing applies to MSLT in this policy; the policy does not specify any stepwise requirements prior to performing the test.
Required clinical documentation for MSLT
Include clinical evidence that meets the policy’s medical necessity elements: duration of excessive daytime sleepiness, objective Epworth Sleepiness Scale score, and prior-night PSG plans/results, plus evaluation of confounding factors.
- Duration of EDS (≥ 8 weeks) and Epworth Sleepiness Scale score (≥ 10)
- Documentation that a standard PSG is planned for the night before the MSLT (or prior-night PSG results showing absence of significant sleep pathology)
- Clinical indication: suspected idiopathic hypersomnia or suspected narcolepsy (note cataplexy, hypnagogic/hypnopompic hallucinations, or sleep paralysis if present)
- Records that medical conditions were considered and treated if indicated, and that medications are noncontributory
- Psychiatric history documentation or note that psychiatric disorder is under the care of a psychiatrist/psychologist
- Documentation excluding drug and alcohol misuse
Coverage depends on meeting policy medical necessity criteria
Requests for MSLT may be denied if the member does not meet all medical necessity criteria (for example, EDS for < 8 weeks, Epworth < 10, no prior-night PSG planned, or unresolved contributing medical/psychiatric conditions).
Key Definitions
Background
The multiple sleep latency test (MSLT) objectively measures tendency to fall asleep and is considered the standard measurement of sleepiness. It typically consists of four or five 20-minute nap opportunities at two-hour intervals performed on the day after an overnight polysomnogram (PSG). A mean sleep latency < 8 minutes together with ≥ 2 sleep-onset REM periods is required by ICSD‑3 for narcolepsy diagnosis; a latency < 5 minutes is regarded as distinctly abnormal. The MSLT is indicated as part of the evaluation for suspected narcolepsy and may be useful in suspected idiopathic hypersomnia, but it must be performed after a valid prior-night PSG and with attention to confounding medical, psychiatric, medication, and substance-use factors.
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