Billable / Specific Code
ICD-10-CM R40.221 is the diagnosis code for Coma scale, best verbal response, none. This code falls under the section "Symptoms and signs involving cognition, perception, emotional state and behavior" within Chapter 18 — Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Understanding where R40.221 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, R40.221 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
R40.221 is the ICD-10-CM diagnosis code for "Coma scale, best verbal response, none". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of R40.221 is R40.22 ("Coma scale, best verbal response"). R40.221 provides a more specific classification within this category.
R40.221 is located in Section R40-R46 — "Symptoms and signs involving cognition, perception, emotional state and behavior" within Chapter 18 of the ICD-10-CM Tabular List.
Use R40.221 when the patients documented diagnosis matches "Coma scale, best verbal response, none" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Coma scale, best verbal response, none is R40.221.
Yes, R40.221 can be used as a primary diagnosis code since it is billable and specific.
R40.221 is in Chapter 18 of the ICD-10-CM Tabular List.
Yes, R40.221 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.