2021 ICD-10-CM Code R40.21

Coma scale, eyes open

Version 2021
Non-Billable Code
No Valid Principal Dx

Not Valid for Submission

R40.21 is a "header" nonspecific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of coma scale, eyes open. The code is NOT valid for the year 2021 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

ICD-10:R40.21
Short Description:Coma scale, eyes open
Long Description:Coma scale, eyes open

Code Classification

Specific Coding for Coma scale, eyes open

Header codes like R40.21 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10 codes with a higher level of specificity when coding for coma scale, eyes open:

  • R40.211 - ... never
  • R40.2110 - ... never, unspecified time
  • R40.2111 - ... never, in the field [EMT or ambulance]
  • R40.2112 - ... never, at arrival to emergency department
  • R40.2113 - ... never, at hospital admission
  • R40.2114 - ... never, 24 hours or more after hospital admission
  • R40.212 - ... to pain
  • R40.2120 - ... to pain, unspecified time
  • R40.2121 - ... to pain, in the field [EMT or ambulance]
  • R40.2122 - ... to pain, at arrival to emergency department
  • R40.2123 - ... to pain, at hospital admission
  • R40.2124 - ... to pain, 24 hours or more after hospital admission
  • R40.213 - ... to sound
  • R40.2130 - ... to sound, unspecified time
  • R40.2131 - ... to sound, in the field [EMT or ambulance]
  • R40.2132 - ... to sound, at arrival to emergency department
  • R40.2133 - ... to sound, at hospital admission
  • R40.2134 - ... to sound, 24 hours or more after hospital admission
  • R40.214 - ... spontaneous
  • R40.2140 - ... spontaneous, unspecified time
  • R40.2141 - ... spontaneous, in the field [EMT or ambulance]
  • R40.2142 - ... spontaneous, at arrival to emergency department
  • R40.2143 - ... spontaneous, at hospital admission
  • R40.2144 - ... spontaneous, 24 hours or more after hospital admission

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code R40.21:


7th Character Note

7th Character Note
Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.

7th Character

7th Character
Indicates that a seventh character is to be assigned to codes in a subcategory.

Code History

  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)