11102

Tangential Biopsy of Skin, Single Lesion

CPT code 11102 represents the surgical procedure for a tangential biopsy of a single skin lesion. This technique involves the removal of a sample of tissue from a skin lesion using a method that does not typically penetrate the full thickness of the dermis, such as shaving, scooping, saucerization, or curetting. The clinical objective is to obtain a representative tissue specimen for histopathological examination to establish or confirm a diagnosis. This procedure is commonly employed when a clinician identifies a suspicious lesion that requires microscopic evaluation, such as suspected basal cell carcinoma, squamous cell carcinoma, or atypical nevi. The tangential approach is particularly effective for lesions that are predominantly elevated above the skin surface or are located within the epidermis or upper papillary dermis. Unlike an excision, which is a therapeutic procedure intended to remove the entire lesion with margins, a biopsy is primarily diagnostic. However, a tangential biopsy might result in the complete removal of the clinical lesion, especially in the case of saucerization, which is a deeper tangential cut designed to provide sufficient depth for the pathologist to assess thickness in suspected melanocytic lesions. The procedure includes the preparation of the surgical site with an antiseptic, the administration of a local anesthetic (typically lidocaine with or without epinephrine), the technical performance of the tissue removal using a scalpel or specialized biopsy blade, and the subsequent management of the wound site, which usually involves chemical hemostasis or electrocautery rather than suturing. The specimen is then preserved in a fixative and sent to a pathology laboratory for analysis. This code is the primary code for the first tangential lesion biopsied during an encounter.

Clinical Indications

  • Suspected malignant neoplasms such as basal cell carcinoma (BCC) or squamous cell carcinoma (SCC)
  • Evaluation of pigmented lesions or atypical nevi to rule out melanoma
  • Diagnostic confirmation of actinic keratosis when malignancy is suspected
  • Evaluation of symptomatic or enlarging seborrheic keratoses where diagnosis is uncertain
  • Assessment of inflammatory skin conditions that require histopathologic correlation
  • Investigation of chronic, non-healing ulcers or plaques
  • Sampling of suspicious lesions in patients with a history of skin cancer

Procedure Steps

  1. Verify patient identity, confirm the lesion site, and obtain informed consent.
  2. Perform a surgical scrub or cleanse the target area with an antiseptic solution such as alcohol or chlorhexidine.
  3. Mark the lesion and planned biopsy margins if necessary.
  4. Administer local anesthesia via subcutaneous or intradermal injection (e.g., 1% lidocaine with epinephrine).
  5. Stabilize the skin surrounding the lesion using the non-dominant hand.
  6. Utilize a sterile #15 scalpel blade, a Dermablade, or a similar instrument to perform a tangential cut (shave, scoop, or saucerization).
  7. Ensure the depth of the cut is sufficient to capture the relevant diagnostic layers of the skin.
  8. Gently lift the specimen and place it into a labeled container with 10% neutral buffered formalin.
  9. Achieve hemostasis at the biopsy site using pressure, aluminum chloride, or electrocautery.
  10. Apply a topical antibiotic ointment or petroleum jelly and cover with a sterile adhesive bandage.
  11. Document the procedure details, site, and specimen handling in the medical record.

Coding Guidelines

  • Use 11102 for the first tangential biopsy performed during a single encounter.
  • If additional tangential biopsies are performed on separate lesions during the same session, use add-on code 11103 for each additional lesion.
  • Do not report 11102 if the same lesion is also undergoing a punch biopsy (11104) or an incisional biopsy (11106).
  • If multiple biopsy techniques are used for different lesions, the most complex technique (incisional > punch > tangential) is reported as the primary code.
  • This code should not be used if the primary intent is therapeutic removal (shave removal 11300-11313 or excision 11400-11646).
  • Simple closure and local anesthesia are included in the biopsy code and are not billed separately.
  • Modifier 25 may be appended to an E/M code if a significant, separately identifiable evaluation and management service was performed on the same day as the biopsy.

Associated ICD-10 Codes