ICD-10-CM > R00-R99 > R70-R79 > R76 > R76.1 > R76.12 R76.12 Nonspecific reaction to cell mediated immunity measurement of gamma interferon antigen response without active tuberculosis Billable/Specific Copy Code Copy Description Applicable To Nonspecific reaction to QuantiFERON-TB test (QFT) without active tuberculosis Type 1 Excludes nonspecific reaction to tuberculin skin test without active tuberculosis (R76.11)positive tuberculin skin test (R76.11)