AHA Coding Clinic® for ICD-10-CM and ICD-10-PCS - 2016 Issue 4; ICD-10-CM NEW/REVISED CODES

Glasgow Coma Scale

Subcategory R40.24-, Glasgow coma scale, total score, will require a 7th character to indicate when the scale was recorded. The 7th characters are similar to those already in existence for the Glasgow coma scale individual scores (R40.21- to R40.23-): 0 - unspecified time1 - in the field [EMT or ambulance]2 - at arrival to emergency department3 - at hospital admission4 - 24 hours or more after hospital admission A code from subcategory R40.24 should be assigned when only the total coma score is documented. In addition, the ICD-10-CM Official Guidelines for Coding and Reporting have...

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