Mohs · May 12, 2026
Mohs Stage Counts and Repair Sequencing Under Post-Payment Review
Mohs is high value per case, which is exactly why it attracts post-payment review. The exposure is rarely the first stage. It is stages two through four and the repair billed alongside them.
This update changes the standing rules set out in our guide to Mohs surgery billing, which is where the evergreen coding logic lives.
What reviewers look for
- A separate, contemporaneous note for each stage billed under 17311-17315, showing the mapping, the tissue examined and the finding that justified proceeding.
- Confirmation that the same physician acted as surgeon and pathologist, which is the defining requirement of the Mohs codes.
- Repair coded on its own merits by closure type and size, with the documentation to support intermediate or complex classification.
- Correct handling where a lesion is excised rather than treated by Mohs, which is a different code family entirely.
Building the record before the review
The defense against recoupment is written at the time of service. A single combined operative note covering four stages is difficult to defend regardless of how accurate it is, because the reviewer cannot tie each billed unit to a documented stage. Stage-by-stage entries take little extra time and remove the argument.
Frequently asked questions
Can the repair always be billed with Mohs?
Repair is separately reportable when performed and documented, but it must be coded by the actual closure type and size. A complex closure billed on a note that describes a simple one is the pattern that triggers recoupment.
Primary sources
More updates
Have us apply this change for you
Coding changes only matter once they reach the claim build. Our coding team maintains these rules per payer so a policy change does not land as next quarter's denial batch.