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R40.21 ⚠ Non-billable

Coma scale, eyes open

ICD-10-CM · FY2026 · Symptoms, Signs and Abnormal Clinical and Laboratory Findings

Code
R40.21
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Symptoms, Signs and Abnormal Clinical and Laboratory Findings
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.

Frequently asked questions

What is ICD-10 code R40.21?
ICD-10-CM code R40.21 represents Coma scale, eyes open. It is a non-billable header code requiring a more specific subcategory in the Symptoms, Signs and Abnormal Clinical and Laboratory Findings chapter, effective October 1, 2025 – September 30, 2026.
Is R40.21 billable?
No. R40.21 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is R40.21 in?
R40.21 belongs to the Symptoms, Signs and Abnormal Clinical and Laboratory Findings chapter (R00–R99) of ICD-10-CM.

Related codes in the R40 category

R40 Somnolence, stupor and coma Non-billable R40.0 Somnolence Billable R40.1 Stupor Billable R40.2 Coma Non-billable R40.3 Persistent vegetative state Billable R40.4 Transient alteration of awareness Billable R40.20 Unspecified coma Billable R40.22 Coma scale, best verbal response Non-billable

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