What is this code?
ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Diseases of the nervous system (G00-G99).
When is it used?
- May be used when a clinician documents insomnia in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
- This entry may represent a broader category rather than the most specific billable code.
Code hierarchy
chapter
6Diseases of the nervous system (G00-G99)
block
G40-G47Episodic and paroxysmal disorders
category
G47Sleep disorders
currentG47
Official coding notes
Excludes2 (may code together if documented)
- alcohol related insomnia (F10.182, F10.282, F10.982)
- drug-related insomnia (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)
- idiopathic insomnia (F51.01)
- insomnia due to a mental disorder (F51.05)
- insomnia not due to a substance or known physiological condition (F51.0-)
- nonorganic insomnia (F51.0-)
- primary insomnia (F51.01)
- sleep apnea (G47.3-)
Where you may see this code
You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.
Related specialists
NeurologistGeneral Physician
Related codes
Sibling codes
Mapped diagnoses and classifications
SNOMED_CT 762348004high
Acute insomnia
Source: SNOMED International ICD-10 map
SNOMED_CT 248255005high
Cannot sleep at all
Source: SNOMED International ICD-10 map
SNOMED_CT 724748004high
Chronic insomnia
Source: SNOMED International ICD-10 map
SNOMED_CT 248258007high
Circumstances interfere with sleep
Source: SNOMED International ICD-10 map
SNOMED_CT 1259480003high
Dementia due to fatal familial insomnia
Source: SNOMED International ICD-10 map
SNOMED_CT 301345002high
Difficulty sleeping
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.
Legacy codes
G47.0
Replacement codes
G47.00 — Insomnia, unspecifiedG47.01 — Insomnia due to medical conditionG47.09 — Other insomnia
Common synonyms
Insomnia
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.