Crystal's MCW Coder Hub⚕️CPT Code 42870 - Excision or Destruction of Pharynx Lesion, Transoral
1. Official Description
42870: Excision or destruction of lesion of pharynx, any method (e.g., laser, electrosurgery, cryosurgery), transoral
This code describes a procedure where a physician removes or destroys a lesion (such as a cyst, tumor, or papilloma) located in the pharynx. The procedure is performed through the mouth (transoral approach), and the physician can use various techniques for removal or destruction, including sharp excision, laser ablation, electrocautery, or cryosurgery. The code is inclusive of the method used.
2. Key Details & Reimbursement
- Work RVU (wRVU): 4.65 (Note: RVUs are subject to change annually by CMS)
- Global Period: 90 days. This means all typical pre-operative, intra-operative, and post-operative care related to this specific procedure is included in the payment for 90 days following the surgery.
- Assistant Surgeon Payable: Yes, if medical necessity is documented. The procedure may be complex enough to require an assistant. Modifier -80, -81, -82, or -AS would be used.
- MS-DRG (Medicare Severity-Diagnosis Related Group): The MS-DRG is determined by the principal diagnosis, secondary diagnoses (CCs/MCCs), and procedure performed. Common MS-DRGs for this procedure include:
- 146: Major Head and Neck Procedures with MCC
- 147: Major Head and Neck Procedures with CC
- 148: Major Head and Neck Procedures without CC/MCC
3. CPT Code Tree
This code falls under the Surgery > Respiratory System > Pharynx, Adenoids, and Tonsils > Excision and Destruction section of the CPT manual.
4. Inclusions (What is Bundled in the Code)
The reimbursement for 42870 assumes the following components are part of the standard procedure and are not billed separately:
- Approach: A transoral (through the mouth) approach.
- Anesthesia: Administration of local or topical anesthesia. General anesthesia performed by another provider is billed separately by that provider.
- Lesion Removal/Destruction: The use of any standard method like laser, electrocautery, cryosurgery, or cold steel excision.
- Visualization: Direct visualization of the pharynx.
- Simple Closure: Any simple, non-layered closure of the pharyngeal defect, if performed.
- Immediate Post-operative Care: Includes speaking with the family, writing orders, and immediate follow-up in the PACU.
5. Exclusions (What Can Be Billed Separately)
The following procedures or services are considered distinct and may be billed separately if performed and documented appropriately:
- Biopsy of Pharynx: If only a biopsy is taken without complete excision or destruction of the lesion, use a biopsy code like 42800 (Biopsy; oropharynx) or 42804 (Biopsy; nasopharynx) instead. Do not report both for the same lesion.
- Use of Operating Microscope: If the procedure requires an operating microscope for microdissection, you may report add-on code 69990. Documentation must clearly support the medical necessity for the microscope.
- Complex Reconstructive Closure: If the resulting defect requires a complex reconstructive closure (e.g., a tissue flap), that closure may be reported separately.
- Radical Resection / Pharyngectomy: This code is for discrete lesions. For a more extensive resection of the pharynx, see codes like 42890 (Limited pharyngectomy).
- Procedures on a Different Anatomical Site: Any other distinct procedure performed during the same session (e.g., tonsillectomy 42826, laryngoscopy 31525) may be billed separately, usually with a modifier like -59 or -XS.
6. Common ICD-10-CM Linkage & HCC
This procedure must be linked to a diagnosis code that establishes medical necessity.
| ICD-10-CM Code | Description | HCC (Y/N) | Notes |
|---|---|---|---|
| D10.0 | Benign neoplasm of tonsil | No | A common diagnosis for benign growths like papillomas or fibromas on or near the tonsil. |
| D10.5 | Benign neoplasm of other parts of oropharynx | No | Used for benign lesions on the soft palate, uvula, or posterior pharyngeal wall. |
| C10.9 | Malignant neoplasm of oropharynx, unspecified | Yes | HCC 9: Use when pathology confirms a malignancy, such as squamous cell carcinoma. |
| C10.0 | Malignant neoplasm of vallecula | Yes | HCC 9: Specific for malignancies located in the vallecula. |
| J39.2 | Other diseases of pharynx | No | Can be used for conditions like symptomatic pharyngeal cysts or granular pharyngitis. |
| K12.2 | Cellulitis and abscess of mouth | No | May be appropriate if the “lesion” is an abscess being drained (I&D). |
7. Coding Examples
Example 1: Simple Papilloma Excision
- Scenario: A 45-year-old patient presents with a persistent foreign body sensation in the throat. Examination reveals a 1 cm pedunculated papilloma on the posterior pharyngeal wall. The physician performs a transoral excision of the lesion using electrocautery and sends the specimen to pathology.
- CPT Code: 42870
- ICD-10-CM Code: D10.5 (Benign neoplasm of other parts of oropharynx)
- Rationale: This is a direct excision of a pharyngeal lesion via a transoral approach, perfectly matching the code description. The diagnosis points to a benign growth.
Example 2: Malignant Lesion Removal with Microscope
- Scenario: A 68-year-old male with a history of smoking is found to have a suspicious ulcerative lesion on the base of his tongue near the oropharynx. A previous biopsy confirmed squamous cell carcinoma. The surgeon takes the patient to the OR and, using an operating microscope for precise margin control, excises the lesion with a CO2 laser.
- CPT Codes:
- ICD-10-CM Code: C10.8 (Malignant neoplasm of overlapping sites of oropharynx) or a more specific code if applicable.
- Rationale: 42870 is used for the primary procedure. Because the surgeon documented the medical necessity of using the operating microscope for microdissection and margin control on a malignant lesion, 69990 is appropriately added.
Example 3: Incorrect Use (Biopsy Only)
- Scenario: A patient has a large, diffuse area of leukoplakia on the soft palate. The physician is unsure of the pathology and decides to take a small piece of tissue for diagnostic purposes only, without attempting to remove the entire lesion.
- Correct CPT Code: 42800 (Biopsy; oropharynx)
- Incorrect CPT Code: 42870
- Rationale: The intent of the procedure was purely diagnostic (a biopsy). 42870 describes a therapeutic procedure for the excision or destruction of a lesion. Since the entire lesion was not addressed, the biopsy code is the correct choice.