Crystal's MCW Coder Hub⚕️CPT Code 50949 — Laparoscopy, Surgical; Ureterolysis
Quick Reference
Descriptor: Laparoscopy, surgical; ureterolysis 1
Anatomic Site: Ureter (Unilateral or Bilateral)
Approach: Laparoscopic (minimally invasive transabdominal/retroperitoneal)
Global Period: 90 days 68 71 72
Assistant Surgeon: Eligible (modifiers -80, -81, -82, -AS) 4 21 22
Bilateral: Report with modifier -50 or -LT/-RT for unilateral procedures
Key Indication: Retroperitoneal fibrosis, extensive adhesions, ureteral entrapment
📋 Official Descriptor & Clinical Summary
CPT® Descriptor (AMA): Laparoscopy, surgical; ureterolysis 161
Clinical Procedure Summary:
This procedure involves the laparoscopic freeing of the ureter from scar tissue, adhesions, or fibrotic bands that are causing obstruction or entrapment. It is commonly indicated for patients with retroperitoneal fibrosis (Ormond’s disease), prior pelvic surgeries, radiation therapy, or endometriosis causing ureteral compression. The provider establishes pneumoperitoneum and places laparoscopic ports. The peritoneum overlying the ureter is incised, and the ureter is carefully dissected free from surrounding fibrotic tissue or adhesions. Care is taken to preserve the ureteral blood supply. The ureter is mobilized until normal peristalsis is observed and obstruction is relieved. In some cases, omental wrapping or stent placement may be performed to prevent re-adhesion 1841.
Key Technical Components:
- Patient positioning (supine or modified lithotomy)
- Creation of pneumoperitoneum and port placement (typically 3-4 trocars)
- Identification of the ureter (often difficult due to fibrosis)
- Sharp and blunt dissection to free ureter from adhesions/fibrosis
- Preservation of ureteral adventitia and blood supply
- Mobilization of ureter to relieve kinking or obstruction
- Optional omental wrap (report separately if distinct)
- Optional ureteral stent placement (report separately if distinct indication)
- Irrigation, hemostasis, and routine closure
💰 Reimbursement & RVU Data (2026 Medicare MPFS Estimates)
| Component | Value | Notes |
|---|---|---|
| Work RVU (wRVU) | ~24.50* | Reflects significant dissection time and risk of injury 17 51 |
| Practice Expense RVU (Facility) | ~20.50* | Facility setting adjustment |
| Practice Expense RVU (Non-Facility) | ~26.00* | Office/ASC setting (rare for this procedure) |
| Malpractice RVU | ~3.50* | Standard surgical malpractice allocation |
| Total RVU (Facility) | ~48.50* | wRVU + PE-Fac + MP |
| Total RVU (Non-Facility) | ~54.00* | wRVU + PE-NonFac + MP |
| Medicare Allowable (Est.) | 2,300* | Based on 2026 conversion factor (~$33.89) × Total RVU; geographic adjustment via GPCI applies 11 24 |
| Assistant Surgeon Allowable | ~16% of primary | When modifiers -80/-81/-82/-AS appended and payer policy permits 20 21 |
* RVU estimates derived from CMS Physician Fee Schedule Relative Value Files and comparative analysis of laparoscopic urologic dissection procedures. Always verify with current-year CMS RVU lookup tools or payer-specific fee schedules 1755.
🏥 Facility & Inpatient Coding
MS-DRG Mapping (Inpatient Facility Billing)
When performed in an inpatient setting, 50949 typically maps to the following MS-DRGs:
| MS-DRG | DRG Title | Relative Weight (Est.) | Notes |
|---|---|---|---|
| 683 | Renal & Urinary Tract Procedures with CC/MCC | ~2.2 | Most common assignment when comorbidities present |
| 684 | Renal & Urinary Tract Procedures without CC/MCC | ~1.4 | Uncomplicated cases |
| 685 | Admit for Renal & Urinary Tract Diagnosis with CC/MCC | ~1.8 | Rare; if procedure converted or complicated |
DRG assignment depends on principal diagnosis, secondary diagnoses (CC/MCC), and whether the procedure is performed laparoscopically vs. open. Use ICD-10-PCS code 0TN88ZZ (Release Ureter, Laparoscopic Approach) for facility reporting—not CPT® 60.
Code Tree / Hierarchy
Surgery (10000-69990)
└─ Urinary System (50000-53899)
└─ Ureter (50600-50999)
└─ Laparoscopic Procedures (50940-50949)
└─ 50949 Laparoscopy, surgical; ureterolysis
📦 Includes / Excludes / Bundling Guidance
✅ Procedures INCLUDED in 50949
- Laparoscopic access and port placement
- Identification and mobilization of the ureter
- Lysis of adhesions specific to the ureter 67
- Dissection of fibrotic tissue surrounding the ureter
- Irrigation, hemostasis, and routine closure
- Intraoperative cystoscopy if performed solely to facilitate ureteral identification (not separately reportable)
❌ Procedures EXCLUDED / Separately Reportable
| CPT® Code | Procedure | When Separately Reportable |
|---|---|---|
| 50945 | Laparoscopy; ureterolithotomy | If stone removal is performed in addition to lysis for separate indication |
| 50947/50948 | Laparoscopy; ureteroneocystostomy | If reimplantation is required after lysis due to damage/stricture |
| 52332 | Cystoscopy with stent insertion | If stent is placed for a separate condition (e.g., contralateral stone) |
| 49320 | Laparoscopy, diagnostic | Bundled; do not report diagnostic laparoscopy with surgical laparoscopy |
| 44180 | Laparoscopy, lysis of adhesions (general) | Do not report general adhesiolysis codes when specific ureterolysis 50949 is performed 67 |
| 50610 | Ureterolithotomy, open | If procedure converted to open (report open code instead) |
Critical Coding Rule: Do not report general laparoscopic lysis of adhesions (e.g., 44180) with 50949. The specific code 50949 includes the lysis of adhesions directly affecting the ureter. Report 50949 once per ureter. For bilateral ureterolysis, report 50949 with modifier -50 (or -LT + -RT per payer preference) 67.
🧾 Common ICD-10-CM Diagnoses (with HCC Status)
| ICD-10-CM | Diagnosis Description | HCC Status* | Clinical Rationale for 50949 |
|---|---|---|---|
| N48.3 | Retroperitoneal fibrosis | ❌ Not HCC | Primary indication for ureterolysis (Ormond’s disease) |
| N13.5 | Kinking and stricture of ureter, not elsewhere classified | ❌ Not HCC | Obstruction due to adhesions |
| N73.6 | Female pelvic peritoneal adhesions | ❌ Not HCC | Adhesions involving ureter (post-surgical) |
| K66.0 | Peritoneal adhesions | ❌ Not HCC | General adhesions affecting ureter |
| N18.3- | Chronic kidney disease, stage 3 | ✅ HCC Category 13 (CKD) | Comorbidity; often secondary to obstructive uropathy |
| N18.6 | End stage renal disease | ✅ HCC Category 13 (ESRD) | Severe comorbidity |
| N13.2 | Hydronephrosis with renal and ureteral calculous obstruction | ✅ HCC Category 19 (Severe) | If obstruction leads to renal impairment |
| C83.3 | Diffuse large B-cell lymphoma | ✅ HCC Category 8 (Lymphoma) | If fibrosis secondary to malignancy |
| Z87.440 | Personal history of urinary calculi | ❌ Not HCC | Risk factor; not primary procedure diagnosis |
| Z98.890 | Other specified postprocedural states | ❌ Not HCC | History of prior pelvic surgery causing adhesions |
- HCC (Hierarchical Condition Category) status applies to Medicare Advantage risk adjustment. Codes like N18.x (CKD) and N13.2 (Hydronephrosis with obstruction) capture risk adjustment. Structural codes like N48.3 typically do not capture HCC risk unless associated with CKD. Verify current-year CMS-HCC model for updates.
🔄 Modifiers & Special Billing Scenarios
| Modifier | Application to 50949 | Payer Considerations |
|---|---|---|
| -LT / -RT | Unilateral procedure (required by Medicare for anatomical specificity) | Append to indicate side; bilateral requires -50 or both -LT+-RT |
| -50 | Bilateral ureterolysis (same session) | Medicare pays 150% of allowable; commercial payers vary |
| -80 / -81 / -82 / -AS | Assistant surgeon services | Eligible per Medicare 90; document medical necessity for assistant (complex dissection) |
| -22 | Increased procedural services | For dense fibrosis, prior radiation, or extended operative time (>25% beyond typical) |
| -52 | Reduced services | If procedure converted to open (report open code instead) or aborted after access |
| -53 | Discontinued procedure | If aborted after anesthesia induction but before ureterolysis |
| -58 | Staged procedure | For planned second-look laparoscopy within 90-day global |
| -78 | Unplanned return to OR | For complications (e.g., bleeding, leak) during global period |
| -79 | Unrelated procedure | For contralateral ureter treated during global period of initial procedure |
🧪 Coding Examples
Example 1: Unilateral Laparoscopic Ureterolysis for Fibrosis
Scenario: 60M with retroperitoneal fibrosis causing right ureteral obstruction. Laparoscopic ureterolysis performed on right side; ureter freed from fibrotic plaque; stent placed.
Codes:
Example 2: Bilateral Procedure for Adhesions
Scenario: 45F with bilateral ureteral entrapment due to severe endometriosis and prior surgeries. Bilateral laparoscopic ureterolysis performed.
Codes:
- 50949--50 Laparoscopy, surgical; ureterolysis, bilateral
- N73.6 Female pelvic peritoneal adhesions
- N13.5 Kinking and stricture of ureter
Rationale: Bilateral modifier applied to primary code.
Example 3: Conversion to Open Procedure
Scenario: Attempted laparoscopic ureterolysis for retroperitoneal fibrosis; dense vascular adhesions prevent safe laparoscopic dissection; converted to open ureterolysis.
Codes:
Example 4: Assistant Surgeon Documentation
Scenario: Complex case with prior radiation; assistant surgeon (fellow) provides critical retraction and dissection assistance.
Codes:
⚠️ Common Pitfalls & Audit Risks
- Reporting General Adhesiolysis 44180: Do not report general laparoscopic lysis of adhesions with 50949. The specific code includes lysis of adhesions directly affecting the ureter. Reporting both will result in denials for bundled services 67.
- Bilateral Coding Errors: Medicare requires -50 for bilateral procedures on paired organs; some commercial payers prefer -LT+-RT. Verify payer policy to avoid denials.
- Stent Placement Bundling: Stent insertion during the same session for the same indication (obstruction relief) is often bundled. Only report 52332 if stent placement is for a separate, documented reason (e.g., contralateral stone).
- Global Period Violations: Post-op visits, stent removals, or imaging within 90 days are bundled. Use modifiers -24, -58, or -79 only when criteria are strictly met.
- Insufficient Documentation: Operative note must specify laparoscopic approach, extent of fibrosis/adhesions, specific ureteral segments freed, and rationale for laparoscopy over open approach.
🔗 Related Codes & Crosswalks
| Code Type | Code | Relationship to 50949 |
|---|---|---|
| CPT® Parent | 50940-50949 | Laparoscopic procedures on the ureter |
| CPT® Sibling | 50945 | Laparoscopy; ureterolithotomy (stone removal) |
| CPT® Sibling | 50947 | Laparoscopy; ureteroneocystostomy (reimplantation) |
| CPT® Alternative | 50715 | Open ureterolysis (if converted) |
| CPT® Alternative | 44180 | Laparoscopy, surgical; lysis of adhesions (general - do not use with 50949) |
| ICD-10-PCS | 0TN88ZZ | Release Ureter, Laparoscopic Approach (facility coding) |
| HCPCS | A4338 | Ureteral stent, if separately supplied |
📚 References & Sources
1 AAPC CPT® Code 50949 Descriptor
4 Medica Assistant Surgeon Code List 2026
8 Dr.Oracle CPT Guidance for Laparoscopic Ureterolysis
17 CMS RVU26A Physician Fee Schedule File
20 Arkansas Medicaid Physician Fee Schedule
21 Medica Assistant Surgeon Policy PDF
41 OrbDoc CPT 50949 Clinical Guide
55 CMS MPFS Final Rule Summary CY 2026
60 AAPC DRG Crosswalk Tool
67 CPT® Assistant, September 2006: Ureterolithotomy Reporting Guidelines
68 AUA Global Periods for Urological Procedures
71 Medica Global Days Assignments 2026
90 CMS Transmittal R1620CP: Assistant Surgeon Modifiers
Note: All CPT® codes, descriptors, and guidelines are copyrighted by the American Medical Association. ICD-10-CM codes are maintained by CMS/NCHS. Verify all coding decisions with current-year official resources and payer-specific policies.