2026 ICD-10-CM Diagnosis Code G47.20Circadian rhythm sleep disorder, unspecified type
ICD-10-CM Codes›G00–G99›G40-G47›G47
- Billable — Valid for Submission
- Chronic Condition
G47.20 is a billable ICD-10-CM diagnosis code for circadian rhythm sleep disorder, unspecified type. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 11 through 13, 91 through 93. Coders also document this condition as abnormal biorhythm. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Sleep wake disorders.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Abnormal biorhythm
- Abnormal chronobiologic state
- Abnormal circadian rhythm
- Disorder of sleep-wake cycle
- Disruptions of 24 hour sleep-wake cycle
- NRXN1-related severe neurodevelopmental disorder, motor stereotypies, chronic constipation, sleep-wake cycle disturbance
- Organic sleep-wake cycle disorder
- Transient sleep-wake rhythm disorder
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Sleep wake schedule disorder NOS
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Disorder (of) See Also: Disease;
circadian rhythm G47.20
Sleep-wake schedule disorder G47.20
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Sleep Disorders
Sleep is a complex biological process. While you are sleeping, you are unconscious, but your brain and body functions are still active. They are doing a number of important jobs that help you stay healthy and function at your best. So when you don't get enough quality sleep, it does more than just make you feel tired.
The full article covers:
- What is sleep?
- What are sleep disorders?
- What causes sleep disorders?
- What are the symptoms of sleep disorders?
- How are sleep disorders diagnosed?
- What are the treatments for sleep disorders?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert G47.20 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About G47.20Overview
What is the ICD-10 code for circadian rhythm sleep disorder, unspecified type?
The ICD-10-CM code for circadian rhythm sleep disorder, unspecified type is G47.20 (sometimes written as G4720). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Is G47.20 (Circadian rhythm sleep disorders) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report circadian rhythm sleep disorder, unspecified type on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does G47.20 group to?
When circadian rhythm sleep disorder, unspecified type is the principal diagnosis on an inpatient stay, it groups to MS-DRG 11, 12, 13, 91, 92, 93, with relative weights from 0.7963 to 5.4541 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of G47.20?
Under the General Equivalence Mappings, circadian rhythm sleep disorder, unspecified type converts to ICD-9-CM 327.30 (circadian rhym sleep NOS). The mapping is approximate, so confirm the match fits the documentation.
