G47.52 ICD-10-CM Code: REM sleep behavior disorder
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FY 2026 Apr update / Diseases of the nervous system (G00-G99) / Episodic and paroxysmal disorders (G40-G47)
G47.52
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceREM sleep behavior disorder
A sleep disorder where a person acts out their dreams during REM (rapid eye movement) sleep, often involving sudden movements, talking, or even getting out of bed. This occurs because the normal muscle paralysis that happens during REM sleep is not functioning properly.
CMS-HCC V28
00
RAF 0
CMS-HCC V24
00
RAF 0
ACA/HHS
00
RAF 0
ESRD/PACE
00
RAF 0
RXHCC
00
RAF 0
Code Trumping
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Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for G47.52 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for G47.52 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for G47.52 in this effective period.
Excludes 1
Official- alcohol induced parasomnia (F10.182, F10.282, F10.982)
- drug induced parasomnia (F11.182, F11.282, F11.982, F13.182, F13.282, F13.982, F14.182, F14.282, F14.982, F15.182, F15.282, F15.982, F19.182, F19.282, F19.982)
- parasomnia not due to a substance or known physiological condition (F51.8)
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for G47.52 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for G47.52 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for G47.52 in this effective period.
Buddy Documentation Tip
Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.
Is G47.52 an HCC code?
No. G47.52 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
Coder workflow notes
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This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
G47.52 is the ICD-10-CM diagnosis code for rem sleep behavior disorder. A sleep disorder where a person acts out their dreams during REM (rapid eye movement) sleep, often involving sudden movements, talking, or even getting out of bed. This occurs because the normal muscle paralysis that happens during REM sleep is not functioning properly. G47.52 sits in the ICD-10-CM chapter for diseases of the nervous system (g00-g99), within the section covering episodic and paroxysmal disorders (g40-g47).
G47.52 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
Verify documentation specifies REM sleep behavior disorder rather than other parasomnias or sleep-related movement disorders, as the distinction affects code selection.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for G47.52 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Verify documentation specifies REM sleep behavior disorder rather than other parasomnias or sleep-related movement disorders, as the distinction affects code selection
- •Check if the condition is associated with neurodegenerative diseases (Parkinson's, Lewy body dementia) as these may require additional codes for the underlying condition