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  1. ICD-10-CM Home
  2. Chapter 18
  3. R40-R46
  4. R40.20

R40.20

Unspecified coma

Billable

Code Hierarchy

R40R40.2R40.20

Chapter: 18. Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified

Section: R40-R46 - Symptoms and signs involving cognition, perception, emotional state and behavior

Coding Guidelines

Inclusion Terms

  • Coma NOS
  • Unconsciousness NOS

Related Codes

R40.21Category

Coma scale, eyes open

R40.22Category

Coma scale, best verbal response

R40.23Category

Coma scale, best motor response

R40.24Category

Glasgow coma scale, total score

R40.2ABillable

Nontraumatic coma due to underlying condition

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