Other abnormal immunological findings in serum (R76) ICD-10-CM

About the R76 Code Range

The ICD-10 code R76 and its subcategories cover various abnormal immunological findings detected in blood serum tests that do not indicate a specific diagnosis on their own. These codes are used to report unusual antibody levels or immune reactions observed during laboratory testing.

The code R76.0 applies to raised antibody titers, commonly recorded when tests detect elevated levels of antibodies such as antistreptolysin O or rheumatoid factor. This helps medical coders identify findings like a “high antibody titer” or other related markers without concluding a disease. In contrast, R76.1 and its more specific subcode R76.11 describe nonspecific immune responses to tuberculosis testing, including positive Mantoux skin tests that occur without active tuberculosis infection. Additionally, R76.12 is for abnormal gamma interferon antigen responses related to cell-mediated immunity. The code R76.8 encompasses other specified abnormal serum immune findings, which include various antibodies linked to infections or autoimmune conditions (like lupus or hepatitis antibodies). Lastly, R76.9 is reserved for unspecified abnormal immunological serum findings, reported when serology or antibody results are unusual but cannot be more precisely categorized. Together, these codes enable precise reporting of immunological blood test abnormalities such as “ICD-10 code for raised antibody titer” or “ICD-10 code for nonspecific tuberculin test reaction.”