All ICD10 Codes

R40

Non-Billable
ChapterR00–R99
Rankcategory
Official Description

Somnolence, stupor and coma

Use a more specific code (4 billable, 1 non-billable)
R40.0SomnolenceR40.1StuporR40.2Comahas subcodesR40.3Persistent vegetative stateR40.4Transient alteration of awareness
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 18: Symptoms, Signs and Abnormal Clinical and Laboratory Findings (R00-R99).

CH18 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • abnormal findings on antenatal screening of mother (O28.-)
  • certain conditions originating in the perinatal period (P04-P96)
  • signs and symptoms classified in the body system chapters
  • signs and symptoms of breast (N63, N64.5)

R40-R46 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • symptoms and signs constituting part of a pattern of mental disorder (F01-F99)

Instructional Notes

Excludes1(Not coded here. Use a different code.)
  • neonatal coma (P91.5)
  • somnolence, stupor and coma in diabetes (E08-E13)
  • somnolence, stupor and coma in hepatic failure (K72.-)
  • somnolence, stupor and coma in hypoglycemia (nondiabetic) (E15)

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 comaNot billable
R40.0SomnolenceBillable
R40.1StuporBillable
R40.2ComaSubcodes
R40.3Persistent vegetative stateBillable
R40.4Transient alteration of awarenessBillable

Applicable Ancestor Context

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

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

Find Procedures (ICD-10-PCS)

Find surgical and procedural codes related to Somnolence, stupor and coma.

Search PCS Codes