Wiki what is the appropriate icd 9 code

[millortsui]

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.

 

[millercoleen]

Do you know the preoperative diagnosis and exact specimen site, i.e. was this a skin excision?

 

[mitchellde]

This is coded as neoplasm uncertain behavior

 

[hudiknight]

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.