Dermatology Medical Billing Services
Dermatology bills high volumes of small procedures, often several in one visit, and the money is lost in lesion counts, sizes and whether the visit was cosmetic. It is a specialty where a single documentation habit changes the revenue on hundreds of claims.
Codes this specialty bills most
| Code | Description | Watch for |
|---|---|---|
| 11102 | Tangential biopsy of skin, single lesion | Add-on 11103 for each additional lesion. Billing 11102 twice instead of using the add-on is a frequent error. |
| 17000 | Destruction of premalignant lesion, first lesion | With 17003 for lesions two through fourteen. The count has to be in the note, not just on the claim. |
| 17110 | Destruction of benign lesions other than skin tags, up to 14 lesions | Denies as cosmetic where the record does not establish a medical indication. |
| 88305 | Level IV surgical pathology, gross and microscopic examination | Billed per specimen. Separate specimens must be documented separately. |
The denials this specialty sees
Unit mismatches dominate. The claim says fourteen lesions, the note describes "multiple actinic keratoses treated", and the payer pays for one. This is not really a denial problem, it is a documentation problem that surfaces as a denial, and it is fixable with a template change.
The second pattern is cosmetic classification. Benign lesion removal denies by default at most payers unless the record shows a medical indication: bleeding, recurrent irritation, functional impairment, suspicion of malignancy. "Patient requested removal" guarantees the denial. See CO-50.
The third is same-day E/M alongside a procedure. If a patient came in for a scheduled excision, there is usually no separately billable visit. Where a genuinely distinct problem was addressed, modifier 25 applies, but it has to be defensible, and payers audit it.
Our coding review catches unit and modifier problems before submission rather than after.
Payer notes
Most commercial payers publish their own benign lesion removal policies with specific documentation requirements, and they differ from each other. Working from one payer's criteria across your whole panel produces avoidable denials.
Modifier 25 usage is a standing audit target across the specialty. Practices applying it to most visits should expect review at some point.
Common questions
How do we stop benign lesion removals denying as cosmetic?
Document the medical indication in the note at the time of the visit. Bleeding, irritation from clothing, functional impairment, or clinical suspicion. Added afterwards during an appeal, it carries much less weight than the same sentence written contemporaneously.
What size do we use for an excision code?
The lesion diameter plus the narrowest margins required, measured before excision. Measuring from the pathology report is a common and expensive habit, because tissue shrinks in formalin and the code drops a tier.
Can we bill an office visit on the same day as a procedure?
Only when a separately identifiable problem was evaluated. A scheduled procedure visit is not one. Where it applies, modifier 25 is correct, but the note has to support two distinct services.
See what your claims are leaving behind
Send us a month of remittance data and we will tell you what it says: which codes are being denied, how much of it is recoverable, and how long your money is sitting in A/R. It takes about a week and there is nothing to sign.