Regular Expression | REGEX For ICD9 Codes

I am using Python to extract ICD9 codes. And am using the below regular expression icdRegex = recomp('V\d{2}\.\d{1,2}|\d{3}\.\d{1,2}|E\d{3}\.\d') It captures pattern similar to 13

Solution 1:

Add a negative lookahead assertion like the follwing:

(V\d{2}\.\d{1,2}|\d{3}\.\d{1,2}|E\d{3}\.\d)\b(?!\s?(?:lb|kg)s?)

Solution 2:

Here is HamZa's expression for everyone:

icdRegex = recomp("\b(?:V\d{2}\.\d{1,2}|\d{3}\.\d{1,2}|E\d{3}\.\d)\b(?!\s*(?:kg|lb)s?\b)")

Thanks HamZa & Chapelo for helping out. Appreciate it.