G47.22 ICD-10-CM Code: Circadian rhythm sleep disorder, advanced sleep phase type
HCC Buddy Code Card
Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.
FY 2026 Apr update / Diseases of the nervous system (G00-G99) / Episodic and paroxysmal disorders (G40-G47)
G47.22
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceCircadian rhythm sleep disorder, advanced sleep phase type
A sleep disorder where a person's internal body clock is set several hours earlier than normal, causing them to fall asleep and wake up much earlier than desired. This results in early morning awakening and daytime sleepiness despite getting adequate total sleep.
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
Basket needed
Code Book Path
Inclusion Terms
Official- Disorders of the sleep wake schedule
- Inversion of nyctohemeral rhythm
- Inversion of sleep rhythm
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for G47.22 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for G47.22 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for G47.22 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for G47.22 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for G47.22 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for G47.22 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 G47.22 an HCC code?
No. G47.22 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
G47.22 is the ICD-10-CM diagnosis code for circadian rhythm sleep disorder, advanced sleep phase type. A sleep disorder where a person's internal body clock is set several hours earlier than normal, causing them to fall asleep and wake up much earlier than desired. This results in early morning awakening and daytime sleepiness despite getting adequate total sleep. G47.22 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).
G47.22 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.
This code is specific to advanced sleep phase type; do not use it for other circadian rhythm disorders like delayed sleep phase or irregular sleep-wake rhythm.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for G47.22 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •This code is specific to advanced sleep phase type; do not use it for other circadian rhythm disorders like delayed sleep phase or irregular sleep-wake rhythm
- •Document the patient's typical sleep and wake times, and confirm the pattern is consistent and causing functional impairment before coding this diagnosis