ICD-10-CM > R00-R99 > R40-R46 > R41 > R41.8 > R41.82 R41.82 Altered mental status, unspecified Billable/Specific Copy Code Copy Description Applicable To Change in mental status NOS Type 1 Excludes altered level of consciousness (R40.-)altered mental status due to known condition - code to conditiondelirium NOS (R41.0)