Coding updates
Dermatology Coding and Payer Policy Updates
Every change below is written by the coders who work these claims daily, dated when published and re-reviewed on the date shown. Where a rule comes from CMS or the AMA, we link the primary source so you can verify it yourself.
- MohsMay 12, 2026
Mohs Stage Counts and Repair Sequencing Under Post-Payment Review
Stage counts billed without stage-by-stage documentation and repairs bundled incorrectly with the excision are drawing recoupment. What the record has to show.
DermBilling USA Coding Team · Last reviewed August 18, 2026
Read the update - DermpathApril 7, 2026
Dermatopathology TC/26 Splits and Place-of-Service Edits
Global versus technical and professional component billing for dermatopathology, and why place-of-service mismatches between clinic and lab trigger automatic rejections.
DermBilling USA Coding Team · Last reviewed August 18, 2026
Read the update - Prior authMarch 3, 2026
Biologic and JAK Inhibitor Prior Authorization Is Tightening
Step therapy proof, photo documentation and shorter re-authorization windows for psoriasis and atopic dermatitis biologics, and how to keep approvals from delaying care.
DermBilling USA Authorization Team · Last reviewed August 18, 2026
Read the update - Audit targetFebruary 5, 2026
Modifier 25 Downcoding: What Payers Are Automating Now
Commercial payers are automating reductions on E/M billed with same-day dermatology procedures. What triggers it, what documentation defends it, and how to appeal.
DermBilling USA Coding Team · Last reviewed August 18, 2026
Read the update - Policy changeJanuary 15, 2026
2026 Fee Schedule: Conversion Factor and Dermatology RVU Shifts
What the 2026 Medicare Physician Fee Schedule conversion factor and dermatology RVU changes mean for destruction, biopsy and add-on reimbursement, plus the posting checks to run.
DermBilling USA RCM Team · Last reviewed August 18, 2026
Read the update - New codesJanuary 8, 2026
Skin Substitute Application Codes: What Changed for 2026
How the 2026 skin substitute payment and application coding rules change dermatology and wound care billing, and the claim edits to make before your next batch drops.
DermBilling USA Coding Team · Last reviewed August 18, 2026
Read the update
Reference libraries
Updates cover what changed. The reference libraries cover how the code, modifier or denial works in the first place.