G47.9 ICD-10-CM Code: Sleep disorder, unspecified

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for G47.9 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2026Effective: October 1, 2025

Notes without a marker are published on G47.9 itself; “inherited from” names the category or block whose note applies here.

Coder workflow for G47.9

MedCoder structured workflow — derived from this code’s own official record

Before you code G47.9

1. Unspecified does not mean incorrect. When the record gives no greater specificity, G47.9 may be the appropriate code. Check the record for detail that supports a more specific sibling. An unspecified code is for records that do not provide the detail a more specific code needs; a query, not an assumption, is the route to specificity (Guidelines I.A.9.b, I.B.18).

   ReviewG47.2, G47.3, G47.4, G47.5, G47.6

   See the relationships section · Guide: Other vs unspecified (NEC vs NOS) →

Choose the right path

1. Does the record document the detail a more specific sibling code needs?
   Yes → Review the specific siblings in this subcategory.
   No → Continue — G47.9 is appropriate when the documentation goes no further.

   ReviewG47.2, G47.3, G47.4, G47.5, G47.6

Consider G47.9. Then confirm the code is valid for the date of service in the Verify section.

Documentation check

The provider’s diagnostic statement

Codes are assigned from the provider’s documented diagnosis, not from clinical criteria, test values or a medication list (Guidelines I.A.19).

Any detail beyond this code’s title

What the record states that a more specific sibling code would capture — or its absence, which itself supports the unspecified code.

Official instructions as workflow

• Excludes2 — not part of G47.9(4 notes)

  Coding workflow: The conditions named in this note are not included in G47.9. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

  CompareF51.5, F51, F51.4, F51.3

  See the official tabular notes · Guidelines I.A.12.b

Coding decision scenarios

Pattern scenarios for this code’s structure — decision rules, not clinical cases

Every row is derived from this code’s own record — its title, tabular notes, 7th-character family and same-category siblings — with fixed MedCoder wording; nothing is inferred about a patient. The official notes and guideline text are in the sections each row links to, and they control.

Indexed Clinical Terms (5)

Official source data — entries quoted as published, in the Index’s own lookup phrasing

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code. These are alphabetic-index entries shown as the Index writes them — lookup phrasing, not necessarily the wording of a final diagnosis.

• Disorder (of), sleep
• Disorder (of), sleep-wake pattern or schedule
• Disturbance (s), sleep
• Sleep, disorder or disturbance
• Sleep, disturbance

Don’t confuse G47.9 with…

MedCoder analysis — pairs from this code’s official notes, distinctions written by MedCoder

The codes most likely to be picked instead of G47.9 — named in its own official notes, or sharing its laterality or encounter family — with what separates them and which documentation moves the case. Each links to the full comparison.

• F51.5— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  What moves you there: Documentation of nightmares adds F51.5; it is not part of this code and both may be reported when both are documented.

  Full comparison: G47.9 vs F51.5 →

• F51— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  What moves you there: Documentation of nightmares adds F51; it is not part of this code and both may be reported when both are documented.

  Full comparison: G47.9 vs F51 →

• F51.4— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  What moves you there: Documentation of sleep terrors adds F51.4; it is not part of this code and both may be reported when both are documented.

  Full comparison: G47.9 vs F51.4 →

• F51.3— Excludes2 relationship (Informational)

  Distinct conditions — both may be reported.

  A distinct condition — both may be reported when both are documented.

  What moves you there: Documentation of sleepwalking adds F51.3; it is not part of this code and both may be reported when both are documented.

  Full comparison: G47.9 vs F51.3 →

Relationships are read from this code's own official notes, its laterality siblings and its encounter family; the wording of each distinction is MedCoder editorial, and the documentation named in each “what moves you there” line is the official note phrase or sibling title itself. Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a.

Verify Before Coding

• No Medicare Code Editor or MS-DRG Definitions Manual restrictions apply to this code.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim in Claim Check.

Relationships & Classification

MedCoder structured relationships — computed from published CMS and AHRQ datasets

Other codes that name G47.9 or its code family, from the CMS ICD-10-CM tabular instructional notes. Tabular-note edges are stored at the code family level that carries each note.

Referenced by 1 Excludes2 note: F51 — Sleep disorders not due to a substance or known physiological condition (via G47.-).

These codes’ tabular lists name this diagnosis as distinct — both may be reported when both are documented.

MS-DRG Grouper Relationships (FY2026)

Potential MS-DRG participation — not a DRG assignment.

FY2026 MS-DRG: not on the CMS CC/MCC list — as a secondary diagnosis this code does not change MS-DRG severity for that release.

Named in the grouper logic of 1 MS-DRG: DRG 887 (MDC 19).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Clinical classification (AHRQ CCSR):NVS016 — Sleep wake disorders (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Related Codes

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Sleep wake disorders).

G47.35 — Congenital central alveolar hypoventilation syndrome, G47.36 — Sleep related hypoventilation in conditions classified elsewhere, G47.37 — Central sleep apnea in conditions classified elsewhere, G47.39 — Other sleep apnea, G47.411 — Narcolepsy with cataplexy, G47.419 — Narcolepsy without cataplexy, G47.421 — Narcolepsy in conditions classified elsewhere with cataplexy, G47.429 — Narcolepsy in conditions classified elsewhere without cataplexy, G47.50 — Parasomnia, unspecified, G47.51 — Confusional arousals, G47.52 — REM sleep behavior disorder, G47.53 — Recurrent isolated sleep paralysis, G47.54 — Parasomnia in conditions classified elsewhere, G47.59 — Other parasomnia, G47.61 — Periodic limb movement disorder, G47.62 — Sleep related leg cramps, G47.63 — Sleep related bruxism, G47.69 — Other sleep related movement disorders, G47.8 — Other sleep disorders, R06.3 — Periodic breathing, +42 more

Same Index main term, other category

The ICD-10-CM Index to Diseases and Injuries files this code under the main terms “Disturbance”, “Sleep”; these codes share that main term but sit in a different category of the Tabular List.

F91.1 — Conduct disorder, childhood-onset type (conduct, unsocialized), F91.2 — Conduct disorder, adolescent-onset type (conduct, socialized), F91.3 — Oppositional defiant disorder (emotions specific to childhood and adolescence, with, oppositional disorder), F91.8 — Other conduct disorders (conduct, specified NEC), F91.9 — Conduct disorder, unspecified (conduct), F93.8 — Other childhood emotional disorders (emotions specific to childhood and adolescence, mixed), F93.9 — Childhood emotional disorder, unspecified (emotions specific to childhood and adolescence), F94.0 — Selective mutism (emotions specific to childhood and adolescence, with, elective mutism), F98.9 — Unspecified behavioral and emotional disorders with onset usually occurring in childhood and adolescence (habit, child), F99 — Mental disorder, not otherwise specified (mental), G90.9 — Disorder of the autonomic nervous system, unspecified (sympathetic), H51.8 — Other specified disorders of binocular movement (oculogyric), H51.9 — Unspecified disorder of binocular movement (oculomotor), H53.10 — Unspecified subjective visual disturbances (vision, visual, subjective), H53.11 — Day blindness (vision, visual, subjective, day blindness), H53.12 — Transient visual loss (vision, visual, subjective, loss, transient), H53.13 — Sudden visual loss (vision, visual, subjective, loss, sudden), H53.14 — Visual discomfort (vision, visual, subjective, discomfort), H53.15 — Visual distortions of shape and size (vision, visual, subjective, distortions of shape and size), H53.16 — Psychophysical visual disturbances (psychophysical visual), +136 more

Lab tests where this diagnosis supports Medicare coverage (NCD)

Medicare's National Coverage Determination (NCD) program lists this diagnosis as medical justification for these lab tests.

Thyroid Stimulating Hormone (TSH)

Contextual Map

Every relationship of G47.9 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Run G47.9 with this related code in Claim Check

Hierarchy

• G00-G99 — Chapter 6: Diseases of the Nervous System (G00-G99) (G00-G99)[Hierarchy]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• G40-G47 — Episodic and paroxysmal disorders[Hierarchy]— CMS ICD-10-CM tabular structure · icd10cm-fy2026

Referenced by Excludes2 notes

• F51 — Sleep disorders not due to a substance or known physiological condition[Excludes2](via G47.-): “organic sleep disorders (G47.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026

Clinical classification (CCSR)

• NVS016 — Sleep wake disorders[CCSR]— AHRQ CCSR for ICD-10-CM Diagnoses (HCUP)

MS-DRG Grouper

• DRG 887 — OTHER MENTAL DISORDER DIAGNOSES[MS-DRG]: “OTHER MENTAL DISORDER DIAGNOSES (MDC 19)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026

MDC crossing

• MDC 19 — Mental Diseases and Disorders[MDC crossing]: “Mental Diseases and Disorders — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs.”— CMS MS-DRG Definitions Manual · FY2026

Index entries

• Disorder (of), sleep[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• Disorder (of), sleep-wake pattern or schedule[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• Disturbance (s), sleep[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• Sleep, disorder or disturbance[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• Sleep, disturbance[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026

Nearest codes (40)

• G47 — Sleep disorders[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• G47.2 — Circadian rhythm sleep disorders[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• G47.20 — Circadian rhythm sleep disorder, unspecified type[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• G47.21 — Circadian rhythm sleep disorder, delayed sleep phase type[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• G47.22 — Circadian rhythm sleep disorder, advanced sleep phase type[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• G47.23 — Circadian rhythm sleep disorder, irregular sleep wake type[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• G47.24 — Circadian rhythm sleep disorder, free running type[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• G47.25 — Circadian rhythm sleep disorder, jet lag type[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• and 32 more

Change history

• FY2016 — In the code set at ICD-10-CM adoption [Change history]— CMS release files (code change ledger) · icd10cm-fy2016

Sources for this page

Codes, titles, notes, index terms and mappings on this page are transcribed from the datasets below. Relationships MedCoder computed and text MedCoder wrote are labelled where they appear.

Code, title, tabular notes and index terms Official source data

CMS/CDC ICD-10-CM FY2026 tabular list, index and tables, effective October 1, 2025 Release, file and checksum · Publisher’s page

Claim edits Official source data

CMS Definitions of Medicare Code Edits — v43.1 (April 2026) Release, file and checksum · Publisher’s page

Inpatient payment groups Official source data

CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v43 Release, file and checksum · Publisher’s page

Change history and date-of-service validity Official source data

CMS ICD-10-CM release addenda, ingested release by release into the change ledger Release, file and checksum · Publisher’s page

Comparisons, relationships and the contextual map MedCoder structured relationship

Computed by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears

Summary and FAQ answers MedCoder explanation

Written by MedCoder to explain the sources above: drafted with AI assistance, checked by a person against the release files, and labelled as MedCoder text where it appears. Not official text.

Labels on this page: Official source data · MedCoder structured relationship · MedCoder explanation. How to read the labels · All data sources and release dates

Nearest Codes in This Family

Official ICD-10-CM classifications closest to G47.9 in its code family, with their registry titles.

• G47.51 — Confusional arousals
• G47.52 — REM sleep behavior disorder
• G47.53 — Recurrent isolated sleep paralysis
• G47.54 — Parasomnia in conditions classified elsewhere
• G47.59 — Other parasomnia
• G47.6 — Sleep related movement disorders
• G47.61 — Periodic limb movement disorder
• G47.62 — Sleep related leg cramps
• G47.63 — Sleep related bruxism
• G47.69 — Other sleep related movement disorders

View all codes in the G47 family