Hello,
I’m looking to understand why my new employer listed External Codes (S00.00XA) primary, (Z08) secondary and then (Z85.828), when a patient is coming in with new lesions and also for F/U for personal hx of malignant neoplasm of skin. I’m not understanding why the external code usage? I would only use the Z08/Z85.828 for the E/M charge line.

Thoughts?
Thank you in advance!