Wiki what is the appropriate icd 9 code

millortsui

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Atypical squmanous proliferation consistent with invasive well-defferentiated squamous cell carcinoma, associated with scar, present at margin.

Should I code it as 198.2 or 173.60?

Please advise.
 
Sounds like the pathologist is calling it an invasive squamous cell and should be coded as such (173.xx). This was apparently an excision with a healed punch biopsy scar or re-excision where the squamous cell was still present at one margin.
 
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