Dermatology billing turns on details that general medical billing rarely sees. A single visit can include an exam, a biopsy, and the destruction of several lesions. Excision codes depend on the size of the lesion and whether the pathology report comes back benign or malignant. A cosmetic service and a medically necessary one can look almost the same on the schedule. Maximum Billing handles dermatology billing for practices in twelve states, so these claims are coded, documented, and followed up correctly.
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Why Dermatology Billing Is Different
- Procedures and visits on the same day. When a dermatologist evaluates a patient and performs a procedure in the same visit, the evaluation and management service is only separately payable when it is significant and separately identifiable, reported with modifier 25.
- Codes that depend on lesion count and size. Destruction codes are chosen by how many lesions were treated. Excision codes are chosen by the excised diameter, which includes the margins.
- Codes that depend on pathology. Benign and malignant excisions use different code ranges, so the excision is often coded only after the pathology report is back.
- Cosmetic versus medically necessary. Insurance generally does not cover cosmetic services. The documentation has to show why a service was medically necessary, and patients need to know their responsibility before treatment.
- Global periods. Many dermatology procedures carry a global period, so a follow-up visit can be included in the procedure payment unless the visit is for an unrelated problem.
The Codes Dermatology Practices Bill Most
- 99202 to 99215: office and outpatient evaluation and management visits, with modifier 25 when a separate, significant evaluation is performed on the same day as a procedure.
- 11102 to 11107: skin biopsies, coded by technique (tangential, punch, or incisional), with separate codes for the first lesion and each additional lesion.
- 17000, 17003, 17004: destruction of premalignant lesions such as actinic keratoses, coded by the number of lesions treated.
- 17110 and 17111: destruction of benign lesions such as warts, up to 14 lesions or 15 or more.
- 11300 to 11313: shave removal, coded by location and lesion diameter.
- 11400 to 11471 and 11600 to 11646: excision of benign and malignant lesions, coded by location and excised diameter.
- 12001 to 13160: simple, intermediate, and complex repairs. Simple repair is generally included in an excision, while intermediate and complex repairs can be reported separately.
- 17311 to 17315: Mohs micrographic surgery, reported when the same physician acts as both surgeon and pathologist.
- 96910 and 96920 to 96922: phototherapy and laser treatment for conditions such as psoriasis.
Diagnosis codes have to support each service, from actinic keratoses and benign nevi to basal cell carcinoma, squamous cell carcinoma, and melanoma. When a lesion is billed before the pathology result is known, the diagnosis may need to be updated once the report arrives.
Modifiers That Decide Whether a Claim Pays
- Modifier 25 for a significant, separately identifiable evaluation on the same day as a minor procedure. The note has to support it, not just the problem that led to the procedure.
- Modifier 59 or the X modifiers (XS, XE, XP, XU) when procedures on different lesions or sites would otherwise be bundled together.
- Modifier 79 for an unrelated procedure during another procedure’s global period, and modifier 24 for an unrelated evaluation during a global period.
- Anatomic modifiers where a payer requires them to show which site was treated.
Missing or unsupported modifiers are among the most common reasons dermatology claims are denied, bundled, or reduced.
Cosmetic Services and Patient Responsibility
Many dermatology practices offer both medical and cosmetic care. Services that are cosmetic are generally the patient’s responsibility, while the same procedure may be covered when the documentation supports medical necessity, such as a lesion that is bleeding, changing, or suspicious. For Medicare patients, an Advance Beneficiary Notice may be needed when a covered service might not be considered medically necessary. Setting expectations before treatment, and documenting the reason for each procedure, prevents both denials and surprised patients.
Where Dermatology Practices Lose Revenue
- Evaluation and management visits not billed, or billed without the documentation to support modifier 25.
- Excisions coded by lesion size instead of excised diameter, or coded before the pathology report.
- Intermediate and complex repairs left off the claim.
- Multiple lesions bundled because the right modifiers were missing.
- Follow-up visits billed inside a global period, or unrelated visits never billed because they looked like follow-ups.
- Prior authorizations missed for procedures or treatments that require them.
Our claims denial management and accounts receivable management services explain how we work these claims.
What Our Dermatology Billing Includes
- Eligibility, benefits, and prior authorization checks before the visit.
- Coding review of procedures, lesion counts, sizes, repairs, and modifiers against the note.
- Claim submission with pathology-dependent codes and diagnoses finalized correctly.
- Payment posting with underpayments flagged against your contracts.
- Denial follow-up, appeals, and corrected claims.
- Patient statements and balance questions, including cosmetic and non-covered services.
- Credentialing and payer enrollment for dermatologists, physician assistants, and nurse practitioners.
We work inside the practice management system you already use. We sign a Business Associate Agreement with every client, and every team member completes HIPAA certification. As of 2026, our clients’ claims reach a 91% clean claim rate, and their accounts receivable average 34 days.
See our medical billing services, group practice billing, and medical credentialing services, or our state pages for Florida, Texas, New Jersey, New York, Pennsylvania, and Illinois.
Frequently Asked Questions
Can a dermatologist bill an office visit and a procedure on the same day?
Yes, when the evaluation is significant and separately identifiable from the procedure. It is reported with modifier 25, and the note has to support it.
Which CPT codes are used for skin biopsies?
Codes 11102 to 11107, chosen by biopsy technique (tangential, punch, or incisional) and whether it is the first lesion or an additional one.
Why does an excision code depend on the pathology report?
Benign and malignant excisions use different code ranges, so the final code depends on whether the lesion is benign or malignant.
Does insurance cover cosmetic dermatology?
Generally no. Cosmetic services are usually the patient’s responsibility, while the same procedure may be covered when the documentation shows it was medically necessary.
Talk to Us About Your Dermatology Practice
Tell us about your providers, payers, and software, and we will review your aging report and recent denials with you. Contact us to schedule a consultation, or call 800-820-0364.