ICD-10-CM > R00-R99 > R70-R79 > R79 > R79.8 R79.8 Other specified abnormal findings of blood chemistry Non-Billable/Non-Specific Codes R79.81Abnormal blood-gas levelR79.82Elevated C-reactive protein (CRP)R79.83Abnormal findings of blood amino-acid levelR79.89Other specified abnormal findings of blood chemistry