ICD-10-CM > R00-R99 > R25-R29 > R29 > R29.7 > R29.72 R29.72 NIHSS score 20-29 Non-Billable/Non-Specific Codes R29.720NIHSS score 20R29.721NIHSS score 21R29.722NIHSS score 22R29.723NIHSS score 23R29.724NIHSS score 24R29.725NIHSS score 25R29.726NIHSS score 26R29.727NIHSS score 27R29.728NIHSS score 28R29.729NIHSS score 29