Classification code parser for identifying a classification code to a text

A non-transitory computer readable medium storing instructions that, when executed, cause one or more processors to:

• obtain a classification code and a text;
• generate, from the text, a note token stream, wherein the note token stream includes a note token and a position of the note token, wherein generating the note token stream comprises:
• removing negative content identified from the text, the negative content comprising a portion of the text starting with a negative term;
• generate a keyword map including a keyword associated with the position based on the keyword matching the note token, and the keyword map including a total number of matched keywords associated with the classification code;
• determine a match ratio from the total number of the matched keywords and the total number of the keywords;
• determine a proximity factor based on a keyword span;
• and
• determine a strength of a match between the classification code and the text based on the match ratio and the proximity factor.