ICD-10 – Defect following Mohs
Question:
Can you please advise? Our practice performs reconstructions of defects following Mohs surgery. For context, we typically evaluate the patient prior to surgery to discuss reconstruction. What is the appropriate ICD-10 coding to reflect this wound in the setting of reconstruction?
Answer:
To accurately report this scenario, multiple ICD-10 codes are required:
Z48.1 - Encounter for planned postprocedural wound closure.
Z42.8 - Encounter for other plastic and reconstructive surgery following a medical procedure.
A third ICD-10 code should be selected based on the patient’s diagnosis history, specifically whether there is an active malignant neoplasm or a personal history of neoplasm.
Example: Same Day Mohs surgery and reconstruction
Z48.1 – Encounter for planned postprocedural wound closure.
Z42.8 – Encounter for other plastic and reconstructive surgery following a medical procedure.
Appropriate C-code for the malignancy.
Key Considerations:
The malignancy code is not listed as the primary diagnosis because the service being performed is reconstruction, not treatment of the cancer.
Codes from Chapter 19 of ICD-10 (S00–T88, injury range) are not appropriate, as they are designated for traumatic injuries and do not apply in this clinical context.
Thank you for reaching out to KZA with your inquiry.
*This response is based on the best information available as of 06/04/26.
