How to make Regex ignore a pattern after a specific group
I posted this question 2 months ago and got the following REGEX pattern to capture ICD9 codes. It is expected to capture only ICD9 codes (for example: 134.57 or V23.54 or E33.62) and ignore patient weight 134.57 lbs or laboratory result, for example 127.20 mg / dL.
icdRegex = recomp('(V\d{2}\.\d{1,2}|\d{3}\.\d{1,2}|E\d{3}\.\d)(?!\s*(?:kg|lb|mg)s?)')
Now there are exceptions. The second part of the regex does not ignore the pattern, followed by either kilograms, pounds, mg, or any other stop words.
I can write some basic Regex, but this is getting too complicated for my tiny brain and needs help.
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(?:(?:V\d{1,2}\.\d{1,2})|(?:\d{1,3}\.\d{1,2})|(?:E\d{1,2}\.\d+))(?!\d|(?:\s*(?:kg|lb|mg)s?))
Try it. Check out the demo.
https://regex101.com/r/pM9yO9/12
modified the lookahead to include \d in it so that partial matches are avoided
x="""134.57 or V23.54 or E33.62 134.57 lb or a lab result like 127.20 mg/dL"""
print re.findall(r"(?:(?:V\d{1,2}\.\d{1,2})|(?:\d{3}\.\d{1,2})|(?:E\d{1,2}\.\d+))(?!\d|(?:\s*(?:kg|lb|mg)s?))",x)
Output: ['134.57', 'V23.54', 'E33.62']
Final version tested against data.
icdRegex = recomp ("(? :( ?: V \ d {1,2}. \ d {1,2}) | (?: \ d {3}. \ d {1,2}) | (: E \ d {1,2} \ d +.)) (\ D | (?!? \ s * (?: kg | lb | mg) s)) ") codes = findall (icdRegex, hit)
where "hit" will be a clinical note.
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