CPT code 51728: Urodynamic study, with voiding pressure2026 Medicare rate & RVUs

Medicare pays $336.68 for 51728 nationally in the office. Local office rates run $296.38–$455.99.

Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.

What 51728 covers

This urodynamic test records bladder pressure as the bladder fills and during voiding, helping assess how the bladder stores and empties urine. Urologists and urogynecologists commonly order it for patients with urinary retention, incontinence, suspected outlet obstruction, or neurogenic bladder. Testing is generally performed in an office or facility with catheter-based pressure measurement and recording equipment.

Report 51728 when the completed study includes complex cystometry and voiding pressure assessment; a filling-only complex study or one that also includes a urethral pressure profile may call for a different code. The record should support the study performed and its interpretation. The global service includes the professional interpretation and technical work; modifier 26 identifies interpretation, and modifier TC identifies equipment and staff. This has a 0-day global period, so same-day preoperative and postoperative care is included. When multiple procedures occur in one session, the highest-valued is paid in full and others are subject to the standard 50% reduction. Bilateral adjustment is inappropriate. Assistant-at-surgery payment requires documented medical necessity; co-surgeons and team surgery are not permitted.

This summary was written with AI assistance from CMS physician fee schedule data and checked against the CMS billing rules shown here. Rates on this page come directly from CMS files.

Where 51728 pays more and less

The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.

109 of 109 payment localities

51728 rates by state

Office rate range in each state. Select a state to see its payment localities.

How the 51728 rate is calculated

Each of 51728’s three RVUs is multiplied by a geographic index (GPCI) for the payment locality, added up, and multiplied by the conversion factor. Drag the indexes or enter a ZIP to see what moves the rate.

Payment rules and modifiers for 51728

The CMS indicators that decide how 51728 is paid alongside other services.

What modifiers do to the payment

When to use modifier 26

51728 compared with similar codes

How to choose

51726CystometrogramElectronic pressure-volume testing

51726 represents complex cystometry without voiding pressure assessment. Choose 51728 when the documented test also evaluates pressure during voiding.

51727Urodynamic testingWith urethral pressure profile

51727 adds a urethral pressure profile to complex cystometry. 51728 instead includes voiding pressure assessment without that profile.

51729Urodynamic studyVoiding and urethral pressures

51729 includes both voiding pressure assessment and a urethral pressure profile; 51728 includes the voiding-pressure component without the profile.

51797Abdominal pressure testUrodynamic add-on measurement

51797 reports a separate intra-abdominal voiding pressure study as an add-on. It does not replace the complex cystometry and voiding pressure service reported with 51728.

Codes related to 51728

Related codes aren’t interchangeable: bill the code that matches the service performed.

Where these rates come from

FeeBase calculates base physician payments from CMS work, practice-expense and malpractice RVUs, adjusted by each locality’s geographic indexes and the conversion factor. Services without a published rate are labeled, never given a made-up amount. Amounts are Medicare allowed amounts before claim adjustments: not a patient’s bill or a commercial rate.

CMS RVU26D · effective Oct 1, 2026 through the day before Jan 1, 2027

Open CMS sourceHow we calculate rates