Crystal's MCW Coder Hub😷 CPT 50546: Laparoscopy, surgical; nephrectomy, including partial ureterectomy, with regional lymphadenectomy
Short Definition
Laparoscopic radical nephrectomy with regional lymphadenectomy — minimally invasive surgical removal of an entire kidney, perinephric fat, and Gerota’s fascia with partial ureterectomy, combined with regional lymph node dissection, performed via laparoscopic (or hand-assisted laparoscopic or robotic-assisted laparoscopic) approach.
Full CPT Descriptor
Laparoscopy, surgical; nephrectomy, including partial ureterectomy, with regional lymphadenectomy
Long Clinical Definition
CPT 50546 describes a laparoscopic radical nephrectomy with regional lymphadenectomy — the minimally invasive equivalent of the open CPT 50230. It represents one of the most commonly performed major urologic oncology procedures in contemporary practice, used primarily for the treatment of clinically significant renal cell carcinoma (RCC) where nephron-sparing surgery is not feasible.
The procedure involves:
- Laparoscopic mobilization of the kidney within Gerota’s fascia and perinephric fat.
- Ligation and division of the renal artery and renal vein.
- Resection of the ipsilateral adrenal gland (when involved or clinically indicated — adrenalectomy is commonly performed but not mandatory for code assignment).
- Partial ureterectomy — removal of the proximal ureter.
- Regional lymphadenectomy — dissection and removal of hilar, para-aortic, paracaval, or interaortocaval lymph nodes in the regional drainage basin of the affected kidney.
- Specimen retrieval through an extraction incision (Pfannenstiel, periumbilical, or flank).
Surgical approaches covered under 50546:
- Pure laparoscopic (transperitoneal) — standard multi-port approach, typically 3-4 ports.
- Retroperitoneoscopic (retroperitoneal laparoscopic) — ports placed in retroperitoneal space directly; avoids peritoneal cavity.
- Hand-assisted laparoscopic (HALS) — a hand-port device allows the surgeon to place one hand in the abdomen while maintaining pneumoperitoneum; useful for larger tumors or complex anatomy.
- Robotic-assisted laparoscopic — da Vinci or similar robotic platform; coded identically to standard laparoscopic approach under current CPT; no separate robotic CPT exists for 50546.
The Lymphadenectomy Distinction — 50545 vs. 50546
This is the most important clinical and coding distinction in the laparoscopic radical nephrectomy family:
| Feature | 50545 | 50546 |
|---|---|---|
| Kidney removed | Yes | Yes |
| Gerota’s fascia included | Yes | Yes |
| Perinephric fat included | Yes | Yes |
| Partial ureterectomy | Yes | Yes |
| Adrenalectomy | May be performed | May be performed |
| Regional lymphadenectomy | Not separately documented as distinct | Yes — documented, performed as distinct component |
| wRVU (approx 2026) | ~20.0 | ~21.07 |
| Typical indication | Lower-stage RCC, no high-risk nodes | Higher-stage RCC, clinical N1, high-risk nodes |
The critical trigger for 50546 vs. 50545 is whether a regional lymphadenectomy was performed and documented as a distinct surgical step. When the operative note describes the identification, dissection, and removal of regional lymph nodes (hilar, para-aortic, paracaval) as a deliberate surgical maneuver — even if the nodes appear normal and the procedure has a staging intent — 50546 is the correct code.
Important AAPC/AUA coding guidance note: The CPT descriptor for 50545 states “includes removal of regional lymph nodes” as part of the radical designation. Some payers and coding authorities interpret this to mean that limited hilar node removal during 50545 is already bundled, and that 50546 should be used only when a more formal, deliberate regional LND is documented. When in doubt, the operative note should clearly describe the lymphadenectomy as a distinct, intentional surgical step with node locations identified to support 50546 over 50545.
CPT Code Family — Laparoscopic Nephrectomy Ladder
| CPT | Descriptor | Key Feature |
|---|---|---|
| 50541 | Laparoscopic ablation of renal cysts | Cyst ablation only |
| 50542 | Laparoscopic ablation of renal mass | Thermal ablation — no resection |
| 50543 | Laparoscopic partial nephrectomy | Nephron-sparing — portion of kidney removed |
| 50544 | Laparoscopic pyeloplasty | UPJ repair — no kidney removal |
| 50545 | Laparoscopic radical nephrectomy | Complete kidney removal without separately documented LND |
| 50546 | Laparoscopic radical nephrectomy with regional lymphadenectomy | Complete kidney removal + regional LND documented |
| 50547 | Laparoscopic donor nephrectomy, living donor | Living donor kidney harvest |
| 50548 | Laparoscopic nephrectomy with total ureterectomy | Kidney + entire ureter + bladder cuff removed |
| 50549 | Unlisted laparoscopic procedure, renal | For procedures not captured by existing codes |
What Is Included in CPT 50546
The following are bundled into 50546 and must NOT be billed separately:
- Complete laparoscopic mobilization and resection of the kidney within Gerota’s fascia.
- Ligation and division of renal artery and vein (laparoscopic stapler, clip, or energy device).
- Perinephric fat and Gerota’s fascia en bloc with the kidney.
- Partial ureterectomy (proximal ureter removal).
- Ipsilateral adrenalectomy — when performed on same side as part of the radical dissection.
- Regional lymphadenectomy — hilar, para-aortic, paracaval nodes in the standard regional drainage basin.
- Port site management, fascial closure of extraction incision.
- Specimen bagging and extraction.
- All routine post-operative E/M visits within the 90-day global period.
- Suture, staple, and drain removal.
What Is NOT Included — Separately Reportable
| Service | CPT | Notes |
|---|---|---|
| Extensive retroperitoneal LND beyond regional nodes | 38589-59 (unlisted laparoscopic, lymphatic, benchmarked to 38780) | When lymph node dissection is substantially more extensive than regional — full para-aortic bilateral or pelvic LND; document in operative note; consider modifier 22 on 50546 as alternative |
| Contralateral adrenalectomy | 60650-59 | Laparoscopic adrenalectomy of contralateral gland — separately reportable |
| Total ureterectomy with bladder cuff | 50548 | If entire ureter including bladder cuff is removed, use 50548 instead of 50546 |
| Laparoscopic repair of concurrent finding | Appropriate CPT with modifier 51 or 59 | Hernia repair, lysis of adhesions if distinct and separately documented |
| IVC thrombectomy | Unlisted or 37799 | Laparoscopic IVC thrombectomy — if attempted laparoscopically and then requiring open conversion; conversion code is 50230 |
| Post-op unrelated E/M | Appropriate E/M with modifier 24 | Unrelated conditions during global period |
| Return to OR for complication | 50546-78 | Unplanned return for complication within global period |
| Conversion to open | 50230 | See conversion section below |
Conversion to Open — Critical Coding Scenario
Conversion from laparoscopic to open during the same operative session is one of the most clinically significant coding decisions in laparoscopic nephrectomy:
Scenario A — Diagnostic laparoscopy only; surgeon determines open required before therapeutic work begins:
- Report 50230 (open radical nephrectomy) — the open procedure was the definitive therapeutic procedure.
- Do NOT report 50545 or 50546 separately — the laparoscopic portion was diagnostic, not therapeutic.
Scenario B — Therapeutic laparoscopic procedure begins but is discontinued due to bleeding or unsafe anatomy:
- Report 50545-53 or 50546-53 (discontinued procedure) for the incomplete laparoscopic portion.
- Report 50230 for the open radical nephrectomy.
- Modifier -53 (discontinued procedure) on the laparoscopic code reflects that it was started but not completed.
- Some payers prefer modifier -52 (reduced services) when the surgeon discontinued at their own discretion; -53 when discontinued due to patient safety or complication.
- Documentation must clearly describe when and why the conversion occurred.
Scenario C — Full laparoscopic procedure attempted and completed, then incision required for uncontrolled hemorrhage post-extraction:
- Report 50546 for the completed laparoscopic radical nephrectomy with LND.
- Open exploration for hemorrhage control may be separately reportable — verify with payer.
Robotic-Assisted Laparoscopic Nephrectomy and CPT 50546
Robotic-assisted laparoscopic radical nephrectomy with regional lymphadenectomy is currently reported with CPT 50546 — there is no separate Category I CPT code for robotic nephrectomy. The CPT descriptor “laparoscopy, surgical” encompasses robotic-assisted laparoscopic techniques under current AMA CPT guidance.
Documentation should describe the robotic platform used (e.g., da Vinci Xi, da Vinci SP) and the operative technique, but the CPT code remains 50546 regardless of whether the procedure is performed with standard laparoscopic or robotic instrumentation.
wRVU
| Year | wRVU |
|---|---|
| 2025 | 20.79 |
| 2026 | 21.07 |
CPT 50546 carries slightly higher wRVU than 50545 reflecting the additional complexity and time of the regional lymphadenectomy component. Verify against the CMS MPFS Final Rule for CY2026 published November 2025 for exact final values.
Global Surgical Period
- Global period: 090 (90-day global package)
- All of the following are bundled into the surgical fee:
- Pre-operative evaluation one day before surgery.
- All intraoperative services.
- All routine post-operative follow-up within 90 days.
- Port site and extraction wound care, suture/staple removal.
- Drain management and removal.
- Management of routine post-op complications not requiring return to OR.
Outside the global (separately billable):
- Unrelated conditions — modifier -24.
- Return to OR for complications — modifier -78.
- Planned staged procedures — modifier -58.
- New unrelated procedure same surgeon — modifier -79.
Assistant at Surgery
- Payable: Yes — CPT 50546 is a major, complex laparoscopic procedure for which assistant-at-surgery is payable under Medicare MPFS.
- This contrasts with 50220 (simple open nephrectomy) which typically does NOT allow an assistant under Medicare.
- Modifiers:
- Robotic-assisted cases (bedside assistant at robotic console) — document the bedside assistant’s role in the operative note; typically use -AS or -80 depending on credential.
- Always verify the specific MPFS assistant-at-surgery indicator for 50546 in the current year’s MPFS.
HCC / Risk Adjustment
CPT codes do not carry HCC mapping. HCC weight flows from the ICD-10-CM diagnosis:
| ICD-10-CM | Description | HCC |
|---|---|---|
| C64.1 | Malignant neoplasm of right kidney | HCC 10 |
| C64.2 | Malignant neoplasm of left kidney | HCC 10 |
| C65.1 | Malignant neoplasm of right renal pelvis | HCC 10 |
| C65.2 | Malignant neoplasm of left renal pelvis | HCC 10 |
| C79.01 | Secondary malignant neoplasm of right kidney | HCC 10/11 |
| C79.02 | Secondary malignant neoplasm of left kidney | HCC 10/11 |
| D41.01 | Neoplasm of uncertain behavior, right kidney | No HCC direct |
| D41.02 | Neoplasm of uncertain behavior, left kidney | No HCC direct |
Important
Always code the most specific and highest-acuity diagnosis to ensure complete RAF capture for Medicare Advantage patients.
MS-DRG Considerations
CPT 50546 groups under MDC 11 — Diseases and Disorders of the Kidney and Urinary Tract:
Neoplastic principal diagnosis (most common):
| DRG | Description | When |
|---|---|---|
| 656 | Kidney and Ureter Procedures for Neoplasm with MCC | Neoplasm principal + MCC documented |
| 657 | Kidney and Ureter Procedures for Neoplasm with CC | Neoplasm principal + CC documented |
| 658 | Kidney and Ureter Procedures for Neoplasm without CC/MCC | Neoplasm principal, no CC/MCC |
DRG reimbursement note: 50546 (laparoscopic) and 50230 (open) typically group to the same DRG family — the DRG does not differentiate laparoscopic vs. open approach. However, laparoscopic cases typically have shorter LOS, fewer complications, and lower CC/MCC capture compared to open cases, which indirectly affects DRG assignment through comorbidity documentation.
CDI note: Complete documentation of all comorbidities (CKD stage, hypertension, diabetes, prior venous thromboembolism, BMI/obesity) is essential. DRG 656 (with MCC) pays substantially more than DRG 658 (no CC/MCC); accurate comorbidity coding directly affects hospital reimbursement integrity.
Common ICD-10-CM Diagnoses Paired with CPT 50546
Primary Malignant Indications (most common)
| ICD-10-CM | Description |
|---|---|
| C64.1 | Malignant neoplasm of right kidney, except renal pelvis |
| C64.2 | Malignant neoplasm of left kidney, except renal pelvis |
| C65.1 | Malignant neoplasm of right renal pelvis |
| C65.2 | Malignant neoplasm of left renal pelvis |
| C7A.093 | Malignant carcinoid tumor of the kidney |
Uncertain Behavior / High-Risk Mass (less common)
| ICD-10-CM | Description |
|---|---|
| D41.01 | Neoplasm of uncertain behavior, right kidney |
| D41.02 | Neoplasm of uncertain behavior, left kidney |
| D30.01 | Benign neoplasm of right kidney (large AML, oncocytoma requiring nephrectomy) |
| D30.02 | Benign neoplasm of left kidney |
Staging-Related Additional Codes
| ICD-10-CM | Description | When to Add |
|---|---|---|
| C77.2 | Secondary and unspecified malignant neoplasm of intra-abdominal lymph nodes | When LND confirms nodal involvement |
| Z17.0 | Estrogen receptor positive status | Applicable when hormonal receptor testing performed |
| Z79.899 | Long-term drug use — targeted therapy or immunotherapy | Post-operative adjuvant therapy |
Adrenalectomy with CPT 50546 — Nuance
Ipsilateral adrenalectomy performed during laparoscopic radical nephrectomy:
- Generally bundled into 50546 when performed on the same side as part of the same radical dissection.
- Do NOT separately bill 60650 (laparoscopic adrenalectomy) for the ipsilateral gland.
Ipsilateral adrenal gland spared:
- Does NOT downgrade the code — 50546 is appropriate whether or not the adrenal is removed, provided regional lymphadenectomy was performed.
- Document adrenal status in operative note (spared vs. removed and why).
Contralateral adrenalectomy:
- If the contralateral adrenal is separately resected laparoscopically — report 60650-59 (laparoscopic adrenalectomy) as a distinct, separately reportable service.
- Document separately in the operative note.
Extended Lymphadenectomy Beyond Regional — Reporting Nuance
When the lymph node dissection performed is substantially more extensive than a standard regional lymphadenectomy (e.g., full bilateral para-aortic dissection, pelvic node dissection, template-based RPLND):
Option 1 — Unlisted code
- Report 38589-59 (unlisted laparoscopy procedure, lymphatic system), benchmarked to 38780 (open retroperitoneal transabdominal lymphadenectomy, extensive) for valuation.
- Requires operative report attachment and supporting documentation of the extent of LND.
- Submit with cover letter explaining the extended nature of the dissection.
Option 2 — Modifier 22
- Report 50546-22 with a detailed operative note describing the significantly increased time, effort, and extent of lymph node dissection beyond standard regional LND.
- Payers may apply upward payment adjustment of 20-30% when well-documented.
- Simpler claims processing than an unlisted code for many commercial payers.
Coding Examples
Example 1 — Laparoscopic Radical Nephrectomy with Regional LND, Right Kidney, T2a RCC
Scenario 52-year-old with right renal mass 5.8 cm, biopsy-proven clear cell RCC. Laparoscopic radical right nephrectomy performed via 4-port transperitoneal approach. Right kidney removed within Gerota’s fascia. Adrenal gland preserved (normal pre-op imaging). Right hilar and para-aortic regional lymph nodes dissected and removed for staging. Specimen extracted through Pfannenstiel incision.
CPT
- 50546 — Laparoscopic radical nephrectomy with regional lymphadenectomy.
- 50546-80 or 50546-AS — If assistant surgeon or PA was present.
ICD-10-CM
- C64.1 — Malignant neoplasm of right kidney, except renal pelvis.
MS-DRG
- DRG 656/657/658 depending on documented comorbidities.
Example 2 — Robotic-Assisted Laparoscopic Radical Nephrectomy with LND, Left Kidney
Scenario 61-year-old with left renal cell carcinoma T3a (renal vein involvement), no IVC extension on MRI, clinically N0. Robotic-assisted laparoscopic radical left nephrectomy performed using da Vinci Xi platform. Left renal vein thrombus removed during laparoscopic dissection. Adrenal gland removed (indeterminate adrenal nodule on CT). Left para-aortic and hilar lymphadenectomy performed.
CPT
- 50546 — Laparoscopic (robotic-assisted) radical nephrectomy with regional lymphadenectomy; no separate robotic CPT exists.
- 50546-80 — Assistant present at bedside.
ICD-10-CM
- C64.2 — Malignant neoplasm of left kidney, except renal pelvis.
Coding note: Adrenalectomy is bundled — do NOT separately bill 60650. Renal vein thrombus without IVC extension is managed during standard laparoscopic nephrectomy and does not require a separate vascular code. IVC thrombus extending into IVC would require conversion to open (50230) or use of an unlisted vascular code.
Example 3 — Conversion from Laparoscopic to Open Mid-Procedure
Scenario 58-year-old undergoing planned laparoscopic radical right nephrectomy. During port placement and initial dissection, uncontrolled hemorrhage from an accessory renal artery. Surgeon converts to open radical nephrectomy with midline incision. Open radical nephrectomy with regional lymphadenectomy completed.
CPT
- 50545-53 — Laparoscopic radical nephrectomy, discontinued (modifier -53; procedure begun laparoscopically but discontinued due to patient safety emergency).
- 50230 — Open radical nephrectomy with regional lymphadenectomy (definitive completed procedure).
ICD-10-CM
- C64.1 — Malignant neoplasm of right kidney.
Coding note:
Both codes are billable when the laparoscopic procedure was therapeutically attempted before conversion. Modifier -53 on 50545 reflects the incomplete laparoscopic attempt. 50230 is the definitive procedure code. Payer response varies — some payers require modifier -52 instead of -53; verify payer policy. Include operative note documentation of the conversion circumstance.
Example 4 — Extended Retroperitoneal LND Beyond Regional, Modifier 22
Scenario 49-year-old with left RCC and clinical N1 disease — multiple enlarged para-aortic and interaortocaval nodes on CT. Laparoscopic radical left nephrectomy performed with extensive bilateral para-aortic lymph node dissection from the crura to the iliac bifurcation. Operative time significantly extended; 38 lymph nodes retrieved total.
CPT
- 50546-22 — Laparoscopic radical nephrectomy with regional lymphadenectomy; modifier -22 for significantly increased procedural services due to extensive bilateral para-aortic LND well beyond standard regional dissection.
ICD-10-CM
- C64.2 — Malignant neoplasm of left kidney.
- C77.2 — Secondary and unspecified malignant neoplasm of intra-abdominal lymph nodes (if nodal involvement confirmed by frozen section or post-op pathology).
Coding note:
Example 5 — Post-Op Visit Within Global Period, Unrelated Condition
Scenario Patient from Example 1, 21 days post-op, presents to the urologist with a new DVT in the right lower extremity — unrelated to the nephrectomy site.
CPT
- 99214-24 — Established patient E/M, moderate complexity; modifier -24 indicates the visit is for a condition unrelated to the surgery during the active 90-day global period.
ICD-10-CM
- I82.4x1 — Acute deep vein thrombosis of right femoral vein (unrelated to nephrectomy — supports modifier -24).
Example 6 — Return to OR for Port Site Hernia Within Global Period
Scenario Patient from Example 2, 18 days post-op, develops incarcerated port site hernia at the extraction (Pfannenstiel) incision site. Return to OR for laparoscopic port site hernia repair.
CPT
- 49652-78 — Laparoscopic repair of incisional hernia, reducible; modifier -78 indicates unplanned return to OR for complication within the global period of 50546.
ICD-10-CM
- K43.0 — Incisional hernia with obstruction, without gangrene (post-operative hernia complication).
- T81.89xA — Other complications of procedures, initial encounter.
Key Coding Pearls
- 50546 = laparoscopic with LND — the moment a distinct regional lymphadenectomy is documented, 50546 is correct over 50545; do not separately bill a lymphadenectomy code alongside 50545 when 50546 is the appropriate code.
- Robotic = 50546 — no separate robotic CPT currently exists for this procedure; robotic-assisted laparoscopic radical nephrectomy with LND is reported as 50546.
- Adrenalectomy is bundled ipsilaterally — never separately bill 60650 for the same-side adrenal; contralateral adrenalectomy is separately reportable.
- IVC thrombus changes the code — laparoscopic management of limited renal vein thrombus is possible and stays within 50546; significant IVC thrombus typically requires conversion to open (50230) or unlisted vascular code; document thrombus level precisely.
- Conversion to open — requires separate coding; use modifier -53 on the abandoned laparoscopic code and report the open code (50230) separately; operative note must support both charges.
- Extended LND — document nodal template, levels dissected, and number of nodes retrieved; supports modifier -22 or unlisted code 38589-59 when significantly beyond regional standard.
- Assistant payable — unlike CPT 50220 (open simple nephrectomy), 50546 typically allows assistant-at-surgery billing under Medicare; verify annually.
- NOT inpatient-only — unlike 50220/50230, laparoscopic nephrectomy may be performed in outpatient hospital or ASC settings for appropriate patients; verify facility and payer requirements.
- HCC from diagnosis — always code the specific renal malignancy (C64.1/C64.2 → HCC 10) for MA patients; document all comorbidities for CC/MCC DRG capture.
- 90-day global is strict — routine follow-up is not separately billable; use -24 for unrelated conditions, -78 for return to OR, -58 for planned staged procedures.
Suggested Obsidian Linkouts
- CPT 50230 - Open radical nephrectomy with lymphadenectomy
- CPT 50220 - Open simple nephrectomy
- 📋 Urology CPT Codes Reference
- Global Surgical Package MOC
- Procedure Status & Complexity Modifiers
- -22 - Modifier 22, increased procedural services
- -24 - Modifier 24, unrelated E/M during global period
- -50 - Modifier 50, bilateral procedures
- -51 - Modifier 51, multiple procedures
- -52 - Modifier 52, reduced services
- -53 - Modifier 53, discontinued procedure
- -58 - Modifier 58, staged procedure
- -59 - Modifier 59, distinct procedural service
- -62 - Modifier 62, co-surgeons
- -78 - Modifier 78, unplanned return to OR
- -79 - Modifier 79, unrelated procedure during global period
- -80 - Modifier 80, surgical assistant
- -AS - Modifier AS, PA/NP first assist
- -LT - Laterality modifiers
- -XU - Modifier XU, unusual non-overlapping service