Blood type (Z67)

Z67 codes are used to specify an individual’s blood type, including the major ABO groups (A, B, AB, O) and their Rh (Rhesus) factor status as either positive or negative. These codes help clearly document blood grouping for clinical, transfusion, or diagnostic purposes.

The Z67 range includes subcodes for each ABO blood group. For example, Z67.1 specifies Type A blood, and detailed variants like Z67.10 identify Type A, Rh positive, also known as blood group A or its variants such as blood group A>h<. Similarly, Z67.20 covers Type B, Rh positive, a code associated with synonyms like blood group B>3< and RhD positive. The range also includes codes for Type AB (Z67.3) and Type O (Z67.4), with corresponding Rh positive and negative distinctions. Unspecified blood types are captured by codes like Z67.9 and subcategories that cover numerous blood group phenotypes, such as Lewis or Kell, helping coders address less common or unknown blood classifications. The codes Z67.A1 to Z67.A4 specifically reference Duffy blood group phenotypes, important in transfusion medicine and immunohematology. This coding range supports clinical accuracy when blood type influences treatment decisions or compatibility assessments.