The short version
- 17110 covers 1 to 14 benign lesion destructions in a single unit. 17111 covers 15 or more. You never bill both on the same date of service.
- The per-lesion code is the premalignant series: 17000 plus +17003 for each additional. Benign destruction does not count that way.
- Coding errors trigger one in four payer audits. This is one of them. The note, not the ICD-10 code, is what gets it paid.
What 17110 and 17111 actually cover
17110 is destruction of benign lesions. Warts, seborrheic keratoses, molluscum, those sorts of things. Up to 14 of them, one unit, by any method. Fifteen or more moves you to 17111. Also one unit. You do not stack the two on the same date.
Here is what trips people up. 17110 is a count code, not a per-lesion code. Destroy three benign lesions or thirteen and it is still a single 17110. Bill it the way you’d bill the premalignant series, one unit per lesion, for eight warts, and the payer strips seven of those eight units before it pays the first. You code once and get paid once. Overbill and you hand the reviewer the overage plus a reason to look harder.
The per-lesion habit that costs you both ways
Premalignant destruction is mostly actinic keratoses, and it bills per lesion. 17000 for the first, +17003 for each additional through 14, then 17004 once you hit 15. Benign destruction is the mirror image. One 17110, up to 14.
So two opposite mistakes land in the same chart. A biller trained on the AK codes bills 17110 times eight and watches the payer claw it back to one unit. Or it runs the other way. A single 17000 for twelve actinic keratoses, eleven units of +17003 left on the table as a write-off nobody booked. One mistake reads as overbilling. The other is a quiet revenue leak. Both come from the same confusion.
The fix is one question asked before the code. Premalignant, you count. Benign, you do not. Get the biology right and the units follow.
Pathology picks the family, not the method
The destruction method does not pick the code. Cryosurgery, laser, electrosurgery, curettement, same hands, same liquid nitrogen. What picks the family is whether the lesion is benign or premalignant. Benign runs through 17110 and 17111. Premalignant runs through the 17000 series. Document the lesion type in the note, not just the procedure, or the coder is guessing. A guess on a YMYL claim is a downcode waiting to happen.
Covered, or a cash service
Medicare is blunt about it. Under LCD L34200, removal of a benign lesion that poses no threat to health or function is cosmetic and not covered. Emotional distress doesn’t qualify. “It catches on my collar” can.
Warts are generally covered. They’re infectious, they spread, they hurt. The covered indications across Medicare and the commercial payer grid land on the same short list: suspicion of malignancy, recurrent trauma at a friction site, bleeding or pain or intense itch, inflammation or infection, or obstruction of vision or an orifice. Hit one and document it. Hit none and it’s a cash service. Price it, collect up front, and don’t mail it to the payer to be denied. A denial you could have predicted is a denial you chose.
What survives an audit
A diagnosis code does not establish medical necessity on its own. Every one of these policies says so in writing. With coding errors driving a quarter of all payer audits, the note is what stands between a clean 17110 and a records request six months out.
For each session, document the lesion type and why it isn’t benign-and-asymptomatic, the specific symptom or finding, the method, and the count. For warts, note the failed conservative treatment if you tried it. Build that habit into the visit, not the appeal. By appeal, you’re arguing from a record you can no longer change.
If the volume of this is more than your office can carry claim after claim, that is the signal. Our medical billing operation works dermatology coding and the denials that follow it, so your AR isn’t where a payer’s first number goes unchallenged.
Frequently asked questions
What is CPT 17110?
CPT 17110 is the code for destruction of benign skin lesions such as warts, seborrheic keratoses, or molluscum. It covers up to 14 lesions in a single unit, by any method, including cryosurgery, laser, electrosurgery, or curettement. Fifteen or more lesions is reported with 17111, also a single unit.
Can you bill 17110 and 17111 together?
No. 17110 covers 1 to 14 benign lesions and 17111 covers 15 or more. You report one or the other for a date of service, never both.
Is wart removal covered by insurance?
Generally yes. Warts are infectious and often symptomatic, so destruction is typically covered when the record documents the indication. Removing an asymptomatic benign lesion for appearance is cosmetic and not covered.
What is the difference between CPT 17110 and 17000?
17000 is for premalignant lesions like actinic keratoses and bills per lesion (17000 first, +17003 each additional). 17110 is for benign lesions and covers up to 14 in a single unit. The lesion’s pathology, not the destruction method, picks the family.
Tired of coding leaks turning into write-offs?
Dermatology coding and the denials behind it are what we do. Talk to us about putting the follow-up muscle on your AR, not your front desk.
This article is for general informational purposes and is not coding, billing, or legal advice. Verify current rules and your contractor policies before making operational decisions.
