Name of the Condition

• Circadian Rhythm Sleep Disorder, Advanced Sleep Phase Type
• Sometimes referred to as Advanced Sleep Phase Syndrome (ASPS).

Summary

Circadian rhythm sleep disorder, advanced sleep phase type, is a condition where a person consistently goes to sleep and wakes up several hours earlier than the societal norm. This variation in sleep pattern can lead to disruptions in social and occupational responsibilities.

Causes

• Genetic predisposition is a primary cause, with certain mutations in genes that regulate circadian rhythms.
• Age-related changes may also contribute, as the condition is more common in older adults.

Risk Factors

• A family history of circadian rhythm disorders.
• Increasing age, especially being middle-aged or older.
• Certain lifestyle habits that may manipulate natural sleep patterns.

Symptoms

• Inability to stay awake in the evening, often leading to an early bedtime.
• Waking up very early in the morning, regardless of external influences like alarms.
• Difficulty maintaining social or work obligations due to unusual sleep times.

Diagnosis

• Sleep diaries and actigraphy to track sleep patterns over time.
• Clinical evaluation of sleep history.
• Polysomnography may be used to rule out other sleep disorders.

Treatment Options

• Light therapy to help delay bedtime.
• Chronotherapy, which involves gradually adjusting sleep times.
• Behavioral therapy to improve sleep hygiene and adapt personal schedules.

Prognosis and Follow-Up

• With appropriate management, individuals can maintain a more typical sleep-wake cycle.
• Regular follow-up is important to adjust treatment strategies and monitor any changes.

Complications

• Social and occupational dysfunction due to misalignment with typical schedules.
• Potential for developing other sleep disorders, such as insomnia or depression, if left untreated.

Lifestyle & Prevention

• Establishing a consistent sleep schedule that aligns with natural light cycles.
• Minimize exposure to bright light in the morning and increase light exposure in the evening as part of light therapy.

When to Seek Professional Help

• If sleep patterns significantly interfere with daily life and responsibilities.
• Experiencing excessive sleepiness or insomnia that impacts quality of life.

Additional Resources

• American Academy of Sleep Medicine (aasm.org)
• The National Sleep Foundation (sleepfoundation.org)

Tips for Medical Coders

• Ensure the patient's symptoms and sleep pattern align with the diagnosis of an advanced sleep phase type.
• Avoid confusion with other circadian rhythm sleep disorders, such as delayed sleep phase type (G47.21).