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    v1.0.30
    OpenPayerBilling CodesUrodynamic Procedures on the BladderCPT cpt-51797-voiding-pressure-urodynamic-test
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    CPT 51797: Voiding Pressure (Leak Point Pressure) Study

    Medicare pays $108 on average nationally for this procedure.

    CPT code 51797 describes a voiding pressure (leak point pressure) study that measures detrusor muscle contractions during voiding or expressed urine to detect pressure obstruction; this diagnostic urodynamic procedure is a specialized bladder function test typically performed in an outpatient urology or continence clinic setting and is classified as a urodynamic pressure measurement service.

    For related coverage guidance, see recent payer policy updates: Clinical Review Criteria Intraoperative Neurophysiological Monitoring (IONM), Remote Electrical Neuromodulation for Migraines (i.e., Nerivio®), Lumbar Microdiscectomy.

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    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.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    51784Complex cystometrogram (e.g., multichannel; with pressure measurements and filling and voiding phases)Often performed before or with 51797 as part of a complete multichannel urodynamic evaluation; provides filling phase data complementary to voiding pressures.
    51726Noninvasive uroflowmetry, maximum flow rate; single channel, without pressure measurementsMay be performed prior to or alongside 51797 to document voided volume and flow rate.
    51741Cystometrogram, single channelA simpler filling study that may precede or be part of urodynamic testing when full multichannel testing is not required.
    51792Electromyography (EMG) studies of pelvic floor functionOften performed concurrently with 51797 to assess sphincter activity during voiding and correlate with detrusor pressures.
    52000Cystourethroscopy (separate procedure code)May be performed before or after urodynamics in the diagnostic workup to visualize urethral/bladder pathology related to leakage or obstruction.
    51701Insertion of needle electrode into external urethral sphincter for EMGUsed when needle EMG is indicated as part of the urodynamic assessment alongside voiding pressure measurements.

    Related Modifiers

    8 rows

    ModifierDescriptionWhen to Use
    26Modifier 26 (Professional Component) identifies and bills only the professional portion of a split service — the physician’s interpretation, report, and medical judgment — when the technical…- Use CPT Modifier -26 when you are billing only the professional component (PC) of a split‑bill eligible service—i.e., you performed the physician interpretation, medical judgment and prepared a…
    52Modifier ‑52 (Reduced Services) indicates that a service or procedure was partially reduced or omitted at the provider’s discretion, allowing reporting of the basic procedure number with a qualifier…- Use modifier -52 when a physician or qualified health professional electively reduces or omits part of a procedure or service (for example, performing fewer required views or omitting a portion of…
    53Modifier 53 (Discontinued Procedure) signals that a surgical or diagnostic service was begun by the physician but terminated because of extenuating circumstances that threatened the patient’s…- Use modifier -53 when a physician/qualified healthcare professional has started a surgical or diagnostic procedure (e.g., anesthesia administered, incision or scope insertion) and then discontinues…
    59Modifier 59 indicates a distinct procedural service when two procedures that are not normally billed together are clinically and procedurally separate. The CPT definition (as reiterated by CMS)…- Use modifier -59 to report a distinct procedural service when documentation supports that the procedure reported is not normally billed together with another service on the same day because of a…
    76Modifier -76, Repeat Procedure or Service by Same Physician or Other Qualified Health Care Professional, is appended when the same provider performs an identical, medically necessary procedure or…- Use modifier -76 when the same physician or other qualified health care professional performs an identical procedure or service a second (or subsequent) time on the same date of service and the…
    77Modifier 77 indicates that a previously performed procedure or service was legitimately repeated by a different physician or other qualified health care professional. The AMA’s CPT definition…- Use modifier 77 when a basic procedure or service already performed is repeated by a different physician or other qualified health care professional (for example, a second provider independently…
    78CPT modifier -78 indicates an unplanned, related return to the operating or procedure room by the same provider during the global postoperative period. It is appended when treatment for a…- Use modifier -78 when an unplanned, related complication during the original procedure’s global postoperative period requires the patient to return to a formal operating or procedure room and the…
    62Modifier 62 indicates that two surgeons function as co‑surgeons, each performing distinct parts of the same primary surgical procedure. It is appended to the primary procedure code (and any…- Use modifier -62 when two surgeons act as co‑surgeons (both primary surgeons) on a single definitive primary procedure, each performing distinct parts of the same surgical procedure (append -62 to…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    208800000X
    207Q00000X
    208M00000X
    163WR0006X
    207VE0102X
    2279E0002X
    175M00000X
    101200000X

    Related ICD-10-CM Codes

    27 rows

    ICD-10-CM CodeDescription
    F45.41Pain disorder exclusively related to psychological factors
    F98.5Adult onset fluency disorder
    G83.4Cauda equina syndrome
    N31.0Uninhibited neuropathic bladder, not elsewhere classified
    N31.1Reflex neuropathic bladder, not elsewhere classified
    N31.2Flaccid neuropathic bladder, not elsewhere classified
    N31.9Neuromuscular dysfunction of bladder, unspecified
    N32.0Bladder-neck obstruction
    N32.1Vesicointestinal fistula
    N32.89Other specified disorders of bladder

    Showing 1–10 of 27

    Related Payer Policy Updates

    Specialty: Neurology/Neurosurgery1 / 3

    10 rows

    PolicyPayerEffective Date
    Clinical Review Criteria Intraoperative Neurophysiological Monitoring (IONM)Kaiser Permanente2027-01-01
    Remote Electrical Neuromodulation for Migraines (i.e., Nerivio®)bcbsvermont2026-11-01
    Lumbar Microdiscectomyuniverahealthcare2026-10-15
    Artificial Cervical Intervertebral Discuniverahealthcare2026-10-15
    Lumbar Decompressionuniverahealthcare2026-10-15
    Responsive Neurostimulation for Focal EpilepsyPremera Bluecross2026-10-14
    Intraoperative MonitoringProvidence Health Plan2026-10-01
    Intraoperative MonitoringProvidence Health Plan2026-10-01
    High-Intensity Focused UltrasoundMass General Brigham Health Plan2026-10-01
    Vagal Nerve StimulationAmbetter Nevada2026-10-01

    Related Codes

    CPT-51725-CYSTOMETROGRAM-BLADDER-PRESSURE-CAPACITY-TEST

    CPT 51725: Cystometry to Measure Bladder Capacity and Pressure

    CPT-51726-CYSTOMETRY-BLADDER-PRESSURE-TESTING

    CPT 51726: Cystometry to Measure Bladder Capacity and Pressure

    CPT-51727-COMPLEX-CYSTOMETROGRAM-URETHRAL-PRESSURE-PROFILE

    CPT 51727: Complex Cystometrogram with Urethral Pressure Profile

    CPT-51728-COMPLEX-CYSTOMETROGRAM-VOIDING-PRESSURE-STUDIES

    CPT 51728: Complex Cystometrogram with Voiding Pressure Studies

    CPT-51729-COMPLEX-CYSTOMETROGRAM-VOIDING-URETHRAL-PRESSURE-PROFILE

    CPT 51729: Complex Cystometrogram with Voiding and Urethral Pressure Studies

    CPT-51736-UROFLOWMETRY-URODYNAMIC-FLOW-STUDY

    CPT 51736: Uroflowmetry (Urine Flow Measurement)

    CPT-51741-UROFLOWMETRY-URINARY-FLOW-MEASUREMENT

    CPT 51741: Uroflowmetry (Urine Flow Rate)

    CPT-51784-ANAL-OR-URETHRAL-SPHINCTER-ELECTRICAL-ACTIVITY-TESTING

    CPT 51784: EMG of Anal or Urethral Sphincter Muscles

    CPT-51785-ANAL-URETHRAL-SPHINCTER-ELECTROMYOGRAPHY

    CPT 51785: Anal or Urethral Sphincter Electromyography

    CPT-51792-SPHINCTER-ELECTROMYOGRAPHY-ANAL-URETHRAL

    CPT 51792: Anal or Urethral Sphincter Electromyography

    Showing 1–10 of 11

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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