Summary & Overview
CPT 51797: Voiding Pressure (Urodynamic) Measurement
CPT code 51797 denotes a voiding pressure (leak point pressure) measurement, a urodynamic test that records detrusor muscle contractions during active voiding to identify pressure-related urinary obstruction. This diagnostic procedure is clinically important for evaluating urinary incontinence, suspected outlet obstruction, and other lower urinary tract dysfunctions. Nationally, urodynamic testing informs treatment planning and surgical decision-making for patients with complex voiding symptoms.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context for 51797, typical sites of service, and the procedural purpose. The publication also presents payer coverage considerations, common billing modifiers used with urodynamic procedures, and benchmarks for utilization where available. Policy implications for documentation, medical necessity, and potential prior authorization practices are summarized to aid billing and compliance teams.
This resource targets clinicians, coding professionals, and healthcare administrators seeking clear guidance on the role of CPT code 51797 in diagnostic evaluation of lower urinary tract dysfunction. Data not available in the input is noted where applicable.
Billing Code Overview
CPT code 51797 describes a voiding pressure test (sometimes called leak point pressure) that measures contractions of the detrusor muscle during attempted voiding. The procedure evaluates bladder pressure dynamics to detect a pressure obstruction when the patient is able to void or express urine.
Service Type: Urodynamic diagnostic testing
Typical Site of Service: Outpatient urology clinic, ambulatory surgical center, or hospital outpatient department
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A 62-year-old female with a history of mixed urinary incontinence presents to the urology clinic for objective evaluation of bladder function. She reports stress urinary leakage with coughing and intermittent urgency incontinence. The clinician performs a focused history and physical, reviews prior pelvic surgery, and orders urodynamic testing. During the ambulatory visit the patient undergoes multichannel urodynamic testing including filling cystometry and a voiding study. The procedure 51797 (voiding pressure) is obtained while the patient is instructed to void; detrusor pressure is measured during attempted voiding to determine leak point pressure and to assess for detrusor overactivity or outlet obstruction. The typical site of service is an outpatient urology or urogynecology clinic, or an ambulatory surgery center with urodynamics capabilities. The clinical workflow includes pre-procedure consent and instruction, placement of intravesical and rectal catheters, performance of filling cystometry, obtaining the voiding pressure measurements (51797) while recording flow and pressure data, interpretation by the performing physician, and documentation of findings in the medical record. Typical patients include adult men and women evaluated for urinary incontinence, suspected bladder outlet obstruction, or neurogenic bladder dysfunction.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 |