All ICD10 Codes

R40.21

Non-Billable
ChapterR00–R99
Ranksubcategory
Official Description

Coma scale, eyes open

Use a more specific code (4 billable)
R40.211Coma scale, eyes open, neverR40.212Coma scale, eyes open, to painR40.213Coma scale, eyes open, to soundR40.214Coma scale, eyes open, spontaneous
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 18: Symptoms, Signs and Abnormal Clinical and Laboratory Findings (R00-R99).
General instructions are available for the parent sections:
View CH18 NotesView R40-R46 NotesView R40 NotesView R40.2 Notes

Clinical Hierarchy

BillableHas subcodes
CH18Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
R40-R46Symptoms and signs involving cognition, perception, emotional state and behavior (R40-R46)
R40Somnolence, stupor and coma
R40.2Coma
R40.21Coma scale, eyes openNot billable
R40.211Coma scale, eyes open, neverBillable
R40.212Coma scale, eyes open, to painBillable
R40.213Coma scale, eyes open, to soundBillable
R40.214Coma scale, eyes open, spontaneousBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to R40.21:

categoryR40
Somnolence, stupor and coma
View context instructions
blockR40-R46
Symptoms and signs involving cognition, perception, emotional state and behavior (R40-R46)
View context instructions
chapterCH18
Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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