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ICD-10/R40.243

R40.243 ICD-10-CM Code: Glasgow coma scale score 3-8

Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.

Official Registry Overview & Definition

Glasgow coma scale score 3-8 is a non-billable ICD-10-CM category code (R40.243). A more specific billable subcode must be selected for claims submission.

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for R40.243 in the official ICD-10-CM tabular list.

Excludes1 — Not Coded Here

Conditions generally not reported together with this code (Excludes1) -- an error unless the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Excludes2 — Not Included Here

Conditions not covered by this code, but which may be reported alongside it when both are present.

Code First

Underlying conditions that must be sequenced before this code.

  • any associated:
  • fracture of skull (S02.-)
  • intracranial injury (S06.-)

Change history

Verify Before Coding

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

Contextual Map

Every relationship of R40.243 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.

Hierarchy

  • R00-R99 — Chapter 18: Symptoms, Signs and Abnormal Clinical and Laboratory Findings, Not Elsewhere Classified (R00-R99) (R00-R99) [Hierarchy]
  • R40-R46 — Symptoms and signs involving cognition, perception, emotional state and behavior [Hierarchy]

Referenced by Excludes1 notes

  • R40.0 — Somnolence [Excludes1](via R40.2.-): “coma (R40.2-)” · check together
  • R40.1 — Stupor [Excludes1](via R40.2.-): “coma (R40.2-)” · check together
  • R41.82 — Altered mental status, unspecified [Excludes1](via R40.-): “altered level of consciousness (R40.-)” · check together
  • R55 — Syncope and collapse [Excludes1](via R40.2.-): “unconsciousness NOS (R40.2-)” · check together

Referenced by Use Additional Code instructions

  • T65.85 — Toxic effect of medetomidine [Use Additional Code](via R40.-): “somnolence, stupor and coma (R40.-)” · check together
  • T67.0 — Heatstroke and sunstroke [Use Additional Code](via R40.-): “coma and stupor (R40.-)” · check together

Clinical classification (CCSR)

  • SYM010 — Nervous system signs and symptoms [CCSR]

Index entries

  • Glasgow coma scale, total score, 3-8[Index term]

Nearest codes (40)

  • R40 — Somnolence, stupor and coma [Sibling]
  • R40.2344 — Coma scale, best motor response, flexion withdrawal, 24 hours or more after hospital admission [Sibling]
  • R40.235 — Coma scale, best motor response, localizes pain [Sibling]
  • R40.2350 — Coma scale, best motor response, localizes pain, unspecified time [Sibling]
  • R40.2351 — Coma scale, best motor response, localizes pain, in the field [EMT or ambulance] [Sibling]
  • R40.2352 — Coma scale, best motor response, localizes pain, at arrival to emergency department [Sibling]
  • R40.2353 — Coma scale, best motor response, localizes pain, at hospital admission [Sibling]
  • R40.2354 — Coma scale, best motor response, localizes pain, 24 hours or more after hospital admission [Sibling]
  • and 32 more

Change history

  • FY2017 — Became a non-billable header [Change history]

Referenced by Other Codes

Clinical classification (AHRQ CCSR):SYM010 — Nervous system signs and symptoms.

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

Official ICD-10-CM tabular notes on other codes that name R40.243 or its code family.

4 Excludes1 notes: R40.0 (via R40.2.-), R40.1 (via R40.2.-), R41.82 (via R40.-), R55 (via R40.2.-).

2 Use Additional Code instructions: T65.85 (via R40.-), T67.0 (via R40.-).

Frequently Asked Questions (FAQ) & Clinical Guidance

Can R40.243 be billed directly?

No. R40.243 (Glasgow coma scale score 3-8) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.

Does R40.243 require a 7th character?

Yes. The following appropriate 7th character is to be added to subcategory R40.24-:.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to R40.243 in its code family, with their registry titles.

  • R40.2420 — Glasgow coma scale score 9-12, unspecified time
  • R40.2421 — Glasgow coma scale score 9-12, in the field [EMT or ambulance]
  • R40.2422 — Glasgow coma scale score 9-12, at arrival to emergency department
  • R40.2423 — Glasgow coma scale score 9-12, at hospital admission
  • R40.2424 — Glasgow coma scale score 9-12, 24 hours or more after hospital admission
  • R40.2430 — Glasgow coma scale score 3-8, unspecified time
  • R40.2431 — Glasgow coma scale score 3-8, in the field [EMT or ambulance]
  • R40.2432 — Glasgow coma scale score 3-8, at arrival to emergency department
  • R40.2433 — Glasgow coma scale score 3-8, at hospital admission
  • R40.2434 — Glasgow coma scale score 3-8, 24 hours or more after hospital admission

View all codes in the R40 family

Indexed Clinical Terms (1)

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.

  • Glasgow coma scale, total score, 3-8