urethrocystography

DEFINITION of urethrocystography

Urethrocystography is a fluoroscopic imaging procedure in which contrast medium is introduced into the lower urinary tract to opacify and visualize both the urethra and bladder together. It encompasses two primary techniques that may be performed independently or in combination: 1. Retrograde Urethrogram (RUG): Contrast is injected in a retrograde fashion directly into the urethral meatus under fluoroscopy, filling the urethra from distal to proximal. Best for evaluating the anterior urethra (penile and bulbar urethra), strictures, trauma/disruption, fistulas, and diverticula. 2. Voiding Cystourethrogram (VCUG): The bladder is filled with contrast (via catheter or after IV contrast excretion), and images are obtained while the patient voids. This demonstrates the bladder neck, posterior urethra, vesicoureteral reflux (VUR), and bladder wall abnormalities (e.g., trabeculation, diverticula). When combined, the full urethra and bladder are evaluated in one study session. It is widely used in urology for post-traumatic urethral injuries, urethral stricture disease, post-prostatectomy anastomotic leaks, stress urinary incontinence workup, pediatric VUR evaluation, and assessment of bladder fistulas.

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ETYMOLOGY of urethrocystography

greek UrethraGreek ourethra (οὐρήθρα), from ourein” To urinate”; the canal conveying urine from bladder to exterior -o- Connecting vowel Cyst- Greek kystis (κύστις) “Bladder” or “sac” -o- Connecting vowel -graphy Greek graphia (γραφία), from graphein”To write/record” → a radiographic imaging study Full meaning”Radiographic recording of the urethra and bladder”

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🔧 CPT Codes (Outpatient/Professional Reference)

Code	Description
74450	Urethrocystography, retrograde (RUG)
74455	Urethrocystography, voiding (VCUG)
74430	Cystography, minimum 3 views
74420	Urography, retrograde (ureter/pelvis focus)
74240	Radiologic examination, GI tract — upper (for context/contrast)
76000	Fluoroscopy, up to 1 hour (add-on when applicable)

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📝 Inpatient Coder Notes

• BT1Bxxx is your primary code for a true urethrocystography (combined bladder + urethra study). If the study only documents one structure, use the urethra-only or bladder-only codes accordingly.
• Contrast character is critical: Low osmolar contrast (character 1) is most commonly used in modern practice — but always verify the radiology/procedure note for the specific contrast agent used.
• VCUG vs. RUG distinction: Both are types of urethrocystography. In PCS, both map to fluoroscopy of bladder and urethra (BT1B) when the full combined study is performed. If only RUG is done without bladder filling, use the urethra-only codes (BT15x).
• Post-prostatectomy anastomotic leak study: Commonly seen in your urology cases — this is typically a cystogram or VCUG coded with BT1B or BT10 codes depending on whether the urethra was also imaged.
• Pediatric VUR workup: VCUG is the gold standard — same PCS codes apply regardless of age; the diagnosis codes for VUR (N13.70-N13.729) would be assigned separately.

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🏥 ICD-10-PCS Codes (Inpatient)

Section B - Imaging | Body System T - Urinary System

🔬 Fluoroscopy — Bladder and Urethra Combined (primary urethrocystography codes):

Code	Description
BT1B0ZZ	Fluoroscopy of Bladder and Urethra using High Osmolar Contrast
BT1B1ZZ	Fluoroscopy of Bladder and Urethra using Low Osmolar Contrast
BT1BYZZ	Fluoroscopy of Bladder and Urethra using Other Contrast
BT1BZZZ	Fluoroscopy of Bladder and Urethra (no contrast specified)

🔬 Fluoroscopy — Urethra Only (RUG without bladder filling):

Code	Description
BT150ZZ	Fluoroscopy of Urethra using High Osmolar Contrast
BT151ZZ	Fluoroscopy of Urethra using Low Osmolar Contrast
BT15YZZ	Fluoroscopy of Urethra using Other Contrast
BT15ZZZ	Fluoroscopy of Urethra (no contrast specified)

🔬 Fluoroscopy — Bladder Only (cystogram without urethral component):

Code	Description
BT100ZZ	Fluoroscopy of Bladder using High Osmolar Contrast
BT101ZZ	Fluoroscopy of Bladder using Low Osmolar Contrast
BT10YZZ	Fluoroscopy of Bladder using Other Contrast
BT10ZZZ	Fluoroscopy of Bladder (no contrast specified)

🔬 Plain Radiography — Bladder and Urethra (static images only, no fluoroscopy):

Code	Description
BT0B0ZZ	Plain Radiography of Bladder and Urethra using High Osmolar Contrast
BT0B1ZZ	Plain Radiography of Bladder and Urethra using Low Osmolar Contrast
BT0BYZZ	Plain Radiography of Bladder and Urethra using Other Contrast
BT0BZZZ	Plain Radiography of Bladder and Urethra (no contrast)

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DERIVATIONS of urethrocystography

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Query functionality

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Med roots Appendix A Prefixes Appendix B Combining Forms Appendix C Suffixes Appendix D Suffix forms