Crystal's MCW Coder Hub🩺 CPT Code 42850: Laser Destruction of Pharyngeal Lesion(s)
Official CPT Description
CPT 42850: Destruction of lesion(s), pharynx (nasopharynx, oropharynx, hypopharynx), with use of laser.
Layman’s Description
This code describes a surgical procedure where a surgeon uses a specialized, high-energy beam of light (a laser) to destroy abnormal growths or tissue (lesions) located in any part of the pharynx. The pharynx is the part of the throat behind the mouth and nasal cavity, and above the esophagus and larynx. This includes the nasopharynx (upper part, behind the nose), oropharynx (middle part, including the back of the tongue, soft palate, and tonsil area), and hypopharynx (lower part). The laser vaporizes, coagulates, or “burns away” the lesion without requiring a traditional scalpel incision for removal.
Key Coding Details
- Work RVU (wRVU): 6.57 (Note: RVUs are subject to change annually by CMS)
- Global Period: 90 days. This means that all routine, related pre-operative and post-operative care provided by the surgeon within the 90 days following the procedure is included in the payment for 42850 and cannot be billed separately.
- Assistant Surgeon Payable: Yes. An assistant surgeon’s services may be reimbursed if medical necessity is clearly documented in the operative report. For example, an assistant might be required for complex cases involving difficult exposure, continuous suction of the laser plume, or manipulation of tissue to provide the primary surgeon with a clear view.
- HCC (Hierarchical Condition Category): N/A. HCC codes are linked to ICD-10-CM diagnosis codes, not CPT procedure codes. The diagnosis code(s) used to justify the procedure (e.g., C11.9, D10.6) may map to an HCC.
MS-DRG Information
This CPT code is a procedure that, when performed in an inpatient setting, can influence the assigned MS-DRG. The final DRG is dependent on the principal diagnosis, secondary diagnoses (CCs/MCCs), and other procedures performed. Common MS-DRGs this procedure might fall into include:
- MS-DRG 146: Major Head & Neck Procedures with MCC
- MS-DRG 147: Major Head & Neck Procedures with CC
- MS-DRG 148: Major Head & Neck Procedures without CC/MCC
CPT Code Tree & Hierarchy
This code is located within the Digestive System section of the CPT manual.
Inclusions and Exclusions
Includes (Bundled Services)
The following services are considered an integral part of the 42850 procedure and are not separately billable:
- Use of an operating microscope or endoscope for visualization during the laser ablation.
- Local anesthesia administered by the surgeon.
- Standard surgical approach and closure.
- Taking a biopsy of the same lesion prior to its destruction. The primary intent is destruction, making the biopsy incidental.
- Immediate post-operative care, including writing orders and communicating with the family and other healthcare professionals.
Excludes (Separately Billable Services)
The following services may be billed separately if performed and properly documented:
- General Anesthesia: Billed by the anesthesiologist (00170, etc.).
- Diagnostic Endoscopy: If a diagnostic endoscopy (e.g., 31575, 42999 for nasopharyngoscopy) was performed at a separate patient encounter on a different day to diagnose the problem, it can be billed. If performed on the same day, it is typically bundled unless it was a significant, separately identifiable E/M service (requiring modifier -25).
- Biopsy of a Separate Lesion: If the surgeon destroys a lesion in the oropharynx (42850) and takes a biopsy of a different, separate lesion in the nasopharynx (e.g., 42804), the biopsy could be billed with a modifier like -59 to indicate it was performed at a separate anatomical site.
- More Extensive Procedures: If the procedure evolves into a more complex resection, such as a partial pharyngectomy (42890), that more comprehensive code should be billed instead of 42850.
Coding Examples & Scenarios
Scenario 1: Benign Papillomas
- Patient: A 45-year-old male with hoarseness and a globus sensation. Examination reveals multiple recurrent papillomas on the base of the tongue and soft palate (oropharynx).
- Procedure: The patient is taken to the operating room. Under general anesthesia, the surgeon uses a CO2 laser coupled to a microscope to systematically ablate all visible papillomas.
- CPT Code: 42850
- ICD-10-CM Codes:
Scenario 2: Early-Stage Cancer
- Patient: A 62-year-old female with a history of smoking, found to have a small (1.5 cm), superficial T1 squamous cell carcinoma on the posterior pharyngeal wall (oropharynx) during a surveillance endoscopy.
- Procedure: The surgeon performs a laser ablation of the lesion with a clear margin of normal tissue. The goal is curative destruction of the tumor.
- CPT Code: 42850
- ICD-10-CM Codes:
Scenario 3: Lesion in Nasopharynx
- Patient: A 38-year-old patient presents with unilateral nasal obstruction and occasional epistaxis. A flexible nasopharyngoscopy in the office identified a vascular lesion on the posterior wall of the nasopharynx, suspicious for a juvenile angiofibroma.
- Procedure: The surgeon performs a laser destruction of the lesion in the nasopharynx to control bleeding and ablate the tissue.
- CPT Code: 42850
- ICD-10-CM Codes:
Documentation & Clinical Considerations
To ensure proper coding and reimbursement, the operative report must clearly state:
- Method of Destruction: Explicitly mention the use of a “laser” (e.g., “CO2 laser,” “KTP laser”).
- Location of Lesion(s): Specify the precise location(s) within the pharynx (nasopharynx, oropharynx, hypopharynx). Be as specific as possible (e.g., “soft palate,” “base of tongue,” “fossa of Rosenmüller”).
- Description of Lesion(s): Note the size, appearance, and number of lesions destroyed.
- Surgical Goal: Indicate the intent of the procedure (e.g., “complete ablation of the visible papillomas,” “destruction of the superficial carcinoma with 5mm margins”).
- Instrumentation: Mention the use of any endoscopes or microscopes for visualization, as this is included in the work of the code.