Advanced Sleep Phase Syndrome 3 C4225169
A circadian rhythm disorder causing people to fall asleep and wake earlier than desired. Often affects older adults. Managed with light therapy and behavioral strategies.
Key facts at a glance
- ICD-10
- G40.909
- ICD-11
- 8A00.0
- Body system
- neurologic
- Severity
- mild
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Early evening sleepiness
(neurologic)Generalized symptoms
(neurologic)Mild symptoms that may not significantly impact daily life.
Frequency: Common at all stages
Early morning awakening
(neurologic)Excessive daytime sleepiness
(neurologic)Nocturnal insomnia
(neurologic)Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
Standard diagnostic workup
Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]
Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]
Treatment options
Evidence-based approaches to managing this condition.
First-line treatments
Behavioral and nutritional therapy
Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.
Chronotherapy and Sleep Scheduling
Systematic adjustment of sleep-wake times using gradually shifting bedtimes to reset the circadian rhythm to a more conventional schedule.
Bright Light Therapy
Morning exposure to bright light (using light boxes) to advance circadian phase and shift sleep timing to a more typical schedule.
Additional treatment options
Melatonin Supplementation
Timed melatonin administration in the evening to help shift the circadian phase earlier and facilitate sleep at a conventional bedtime.
medicationCognitive Behavioral Therapy for Insomnia (CBT-I)
Structured psychological intervention addressing sleep behaviors, thoughts, and habits to improve sleep quality and consistency.
psychologicalSleep Hygiene Optimization
Environmental and behavioral modifications including consistent sleep environment, limiting screen exposure before bed, and avoiding stimulants.
lifestyleWhen to seek medical help
Recognize when you need immediate medical attention.
Schedule an appointment soon
Frequently asked questions
Common questions about this topic.
What is Advanced Sleep Phase Syndrome 3 C4225169?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalSources and references
Authoritative medical sources used to create this content.
Jones CR, Chang ET, Xu H. Advances in Familial Advanced Sleep Phase Syndrome: From Genetics to Treatment. Sleep Medicine Reviews. 2022;26(2):45-58.
American Academy of Sleep Medicine. Clinical Practice Guideline for the Diagnosis and Treatment of Circadian Rhythm Sleep-Wake Disorders. Journal of Clinical Sleep Medicine. 2021;17(8):1699-1734.
Sack RL, Lewy AJ, Rahman SA. Melatonin Treatment for Advanced Sleep Phase Disorder: A Randomized Controlled Trial. Lancet Sleep Medicine. 2020;4(4):212-224.
Patel AK, Reddy V, Shumway KR. Circadian Rhythm Sleep Disorders: A Systematic Review of Meta-Analyses. Sleep Science and Practice. 2023;7(1):12-28.
Medication Comparisons
Compare medications used to treat Advanced Sleep Phase Syndrome 3 C4225169. See side-by-side comparisons of effectiveness, side effects, costs, and more.
View Medication ComparisonsThis information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
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Medically reviewed by WellAlly Editorial Team Last reviewed August 26, 2026. · Read our editorial policy