CPT Code 11400: Excision of Benign Skin Lesion, Trunk/Extremities, 0.5 cm or Less

What is a benign skin lesion excision?

Benign lesion removal involves surgically cutting out noncancerous growths such as cysts, moles (nevi), or lipomas. These epidermal or dermal lesions are generally removed due to irritation, pain, cosmetic concerns, or uncertainty regarding diagnosis.

Methods of excision typically involve scalpel excision followed by suturing (simple closure) or electrocautery to achieve hemostasis. This differs from biopsy procedures, where only a sample is taken rather than complete lesion removal.

CPT code 11400 documentation requirements

Accurate documentation for CPT code 11400 should clearly demonstrate the clinical indication, lesion characteristics, and procedure details. Required documentation includes:

Lesion size and location

Clearly document the exact size, including surgical margins, and precise anatomical location of the lesion(s).

Pathology confirmation of benign status

Include pathology results confirming that the lesion excised is benign or premalignant.

Indication for excision

Document the specific medical reasons for benign lesion removal, such as irritation, bleeding, inflammation, or patient discomfort.

Surgical margins and technique

Provide details of surgical margins included in excision, as well as the surgical technique (e.g., full-thickness excision) and type of closure (simple closure).

CPT code 11400 billing guidelines

CPT code 11400 has specific guidelines that healthcare providers must follow to ensure proper reimbursement and compliance with coding standards. Key guidelines include:

Do not bill with biopsy codes

When a lesion removal is complete, do not report a separate biopsy code. The excision procedure already includes the biopsy if performed simultaneously on the same lesion.

Report one code per lesion

Each lesion excision should have its own code. Use multiple codes when multiple lesions are excised separately, based on individual lesion sizes.

Modifier usage for separate excisions

Apply modifier -59 (distinct procedural service) or modifier -XS when performing distinct lesion excisions on the same date at different anatomical locations or separate encounters.

Adherence to NCCI edits

Providers should ensure compliance with the National Correct Coding Initiative (NCCI) to avoid improper code combinations and claim denials.

Applicable modifiers to CPT code 11400

Modifiers clarify the circumstances surrounding CPT code 11400, ensuring accurate reimbursement:

Modifier 25 (Separately identifiable evaluation and management)

Use when the provider conducts a significant E/M service on the same day as the lesion excision, clearly documented as separately identifiable evaluation.

Modifier 50 (Bilateral procedure)

Applicable if the excision is performed on both sides of the body during the same session.

Modifier 51 (Multiple procedures)

Report when multiple procedures are conducted during the same operative session.

Modifier 59 (Distinct procedural service)

Use to denote that lesion removal was distinct or independent from other procedures performed on the same day.

Modifier 76 (Repeat procedure by the same physician)

Applicable if the same procedure is repeated by the same provider on the same day.

Modifier 77 (Repeat procedure by another physician)

Use if another healthcare provider repeats the procedure on the same date.

Modifier 78 (Unplanned return to OR)

Report if the patient returns unexpectedly to the operating room for a related procedure during postoperative care.

Modifier 79 (Unrelated procedure during postoperative period)

Indicate an unrelated procedure performed during the global postoperative period.

Modifier LT (Left side) and RT (Right side)

Clarify the specific side (left or right) where the lesion was excised.

Other relevant CPT codes

Several related CPT codes cover similar procedures based on lesion type, size, and location:

• 11401–11404, 11406 – Excision of benign lesions larger than 0.5 cm, increasing incrementally up to greater than 4.0 cm.
• 11600–11604, 11606 – Excision codes specifically designated for malignant lesions, differentiated from benign lesion codes.