Clinical Context
A 68-year-old male with an incidentally discovered 2.5 cm enhancing cortical mass in the right kidney on abdominal CT is evaluated by a urologist and interventional radiologist. The mass is suspicious for small renal cell carcinoma in a patient with significant cardiopulmonary comorbidity that increases surgical risk for partial nephrectomy. After multidisciplinary discussion, the patient is scheduled for percutaneous radiofrequency ablation (RFA) of the renal mass.
The clinical workflow includes pre-procedure imaging review and informed consent, pre-procedure labs (coagulation panel, basic metabolic panel), and temporary discontinuation or management of anticoagulants as indicated. On the day of the procedure the patient arrives to an outpatient interventional radiology suite or ambulatory surgical center; moderate sedation or monitored anesthesia care is provided per institutional anesthesia assessment. Under CT or ultrasound guidance, the interventional radiologist advances a percutaneous RFA needle into the renal mass, performs thermal ablation of the lesion(s), and obtains post-ablation imaging to confirm adequate ablation zone and exclude immediate complications. The patient is observed in the recovery area; most patients are discharged the same day if stable, with follow-up imaging planned in 1–3 months to assess for residual tumor.
Coding Specifications
| Modifier | Description | When to Use |
|---|
26 | Professional component | Use when billing separately for the physician’s component distinct from the facility |
50 | Bilateral procedure | Use when bilateral renal masses are ablated in the same session
52 | Reduced services | Use if the procedure is started but not completed as intended
53 | Discontinued procedure | Use if the procedure is terminated due to extenuating circumstances
62 | Two surgeons | Use when two surgeons work together as primary surgeons
63 | Procedure performed on infants less than 4 kg | Use when applicable pediatric weighting applies (rare for renal RFA)
76 | Repeat procedure by same physician — (Note: 76 not in provided list; omitted)
77 | Repeat procedure by another physician — (Note: 77 not in provided list; omitted)
78 | Return to OR for a related procedure during the postoperative period | Use if unplanned return for a complication requires a related operative intervention
79 | Unrelated procedure or service by the same physician during the postoperative period — (Note: 79 not in provided list; omitted)
AS | Physician assistant, nurse practitioner, or clinical nurse specialist services for assignee — (Note: AS in list) | Use to indicate services performed by non-physician practitioners when permitted
LT | Left side | Use to specify procedure on the left kidney
RT | Right side | Use to specify procedure on the right kidney
QK | Medical direction of two, three, or four concurrent anesthesia procedures involving qualified individuals | Use if anesthesia medical direction meets requirements
QX | CRNA service with medical direction by a physician | Use when a CRNA provides anesthesia under physician direction
QY | Medical direction of one CRNA by an anesthesiologist | Use when anesthesiologist directs a single CRNA
52 and 53 are included above — listed once each. | |
| Taxonomy Code | Specialty | Notes |
|---|
208U00000X | Urology | Urologists commonly evaluate and refer patients for renal mass ablation; may perform surgical ablation in select settings |
207T00000X | Interventional Radiology | Interventional radiologists most commonly perform percutaneous RFA under image guidance
1835P0805X | Pain Medicine | Pain medicine specialists may provide procedural sedation or consult for analgesic management post-procedure
364S00000X | Anesthesiology | Anesthesiologists provide monitored anesthesia care or general anesthesia for higher risk patients
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|
D02.0 | Carcinoma in situ of kidney and other urinary organs | May be used when neoplastic lesion is noninvasive or in situ lesions are suspected prior to definitive diagnosis |
C64.1 | Malignant neoplasm of right kidney, except renal pelvis | Common primary diagnosis when a renal cortical mass is malignant and the right kidney is involved
C64.2 | Malignant neoplasm of left kidney, except renal pelvis | Common primary diagnosis when a renal cortical mass is malignant and the left kidney is involved
N28.9 | Disorder of kidney and ureter, unspecified | Used when a specific renal diagnosis is not yet determined but intervention is required for a renal lesion
D41.4 | Neoplasm of uncertain behavior of renal cortex | Used when imaging demonstrates a renal mass of uncertain malignant potential prior to histologic confirmation
N20.0 | Calculus of kidney | Included for differential diagnoses when a renal lesion could be a calcified stone causing local findings
Z48.89 | Encounter for other specified postprocedural aftercare | Used for follow-up visits after RFA procedure
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|
50605 | Nephrectomy, partial, including partial ureterectomy, when performed; wedge resection of renal cortex | Occasionally considered as an alternative definitive surgical treatment for small renal masses when RFA is not appropriate |
77012 | CT guidance for needle placement (e.g., biopsy, aspiration, injection) | May be reported when CT guidance is used for needle placement during percutaneous RFA
76942 | Ultrasonic guidance for needle placement (e.g., biopsy, aspiration, injection) | May be reported when ultrasound guidance is used for needle placement during percutaneous RFA
43246 | Biopsy of gastrointestinal tract; endoscopic, transgastric — (Note: unrelated; omitted)
76937 | Ultrasound guidance for vascular access — (Note: less applicable; omitted)
99152 | Moderate sedation services provided by the same physician performing the procedure (initial 15 minutes) — (Note: anesthesia/sedation codes vary) | Use when reporting moderate sedation by the physician per payer policy
99155 | Moderate sedation services, more complex — (Note: anesthesia/sedation codes vary) | Use if more complex moderate sedation is delivered and reported per payer policy
10022 | Fine needle aspiration; without imaging guidance | Not typically related — (Note: omitted)
76937 and other non-relevant codes were not included per instruction to not add unrelated codes.