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R40.2A

Billable

Nontraumatic coma due to underlying condition

R40.2A is the ICD-10-CM code for Nontraumatic coma due to underlying condition. It is a billable, specific code valid for reimbursement.

Status
Billable
Chapter
R00-R99
Parent
R40.2
Edition
FY2026

R00-R99 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified

Includes

  • •Secondary coma

Excludes1 — not coded here

  • •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.-)

Code first

  • •underlying condition

Frequently asked questions

What is ICD-10 code R40.2A?
R40.2A is the ICD-10-CM code for "Nontraumatic coma due to underlying condition". It falls under R00-R99 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.
Is R40.2A a billable code?
Yes — R40.2A is a billable, specific ICD-10-CM code valid for reimbursement.
What is excluded from R40.2A?
Excludes1 (not coded here): 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.-).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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