ICD-10-CM Book 2026 Edition

Chapters ICD-10-CM Book Table of Content /
chapter 18 R00-R99 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified /
R40-R46 Symptoms and signs involving cognition, perception, emotional state and behavior /
R40 Somnolence, stupor and coma

  Billable ICD-10-CM Code R40.2A
R40.2A
Nontraumatic coma due to underlying condition
Secondary coma
codeFirst
underlying condition
excludes1
coma scale, best motor response (R40.24.-)
coma scale, best verbal response (R40.22.-)
coma scale, eyes open (R40.21.-)
Glasgow coma scale, total score (R40.23.-)