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CPT 51736: Uroflowmetry (Urodynamic Flow Study)

CPT code 51736 denotes uroflowmetry, a noninvasive urodynamic test that records urine flow rate and volume to evaluate lower urinary tract function. Uroflowmetry is widely used in urology and primary care settings to screen for urinary obstruction, evaluate voiding dysfunction, and monitor treatment response. Nationally, consistent coding for uroflowmetry supports quality measurement, appropriate utilization, and accurate claims processing for diagnostic urodynamic services.

This analysis covers major payers including Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of clinical context for uroflowmetry, common sites of service, and what typical claims include. The publication highlights benchmarks for utilization and reimbursement patterns, summarizes relevant policy and coverage considerations, and outlines documentation elements that frequently appear in payer reviews. Where specific payer policy details are not available, the report notes that data is not available in the input.

Intended for billing managers, practice administrators, and policy analysts, the content clarifies how CPT code 51736 is applied in clinical workflows and billing processes and what stakeholders typically consider when reviewing these diagnostic service claims.

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Billing Code Overview

CPT code 51736 refers to uroflowmetry (UFR), a diagnostic procedure that measures the rate and volume of urine flow from the bladder, reported in cubic centimeters per second. The test quantifies the relationship of volume over time to assess voiding function and identify abnormalities such as obstruction or impaired detrusor contractility.

Service type: Diagnostic urodynamic testing

Typical site of service: Outpatient urology clinic or diagnostic testing center, where a patient voids into a calibrated uroflowmeter that records flow rate and total volume.

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CPT 51736: Uroflowmetry (Urodynamic Flow Study)

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Billing Code Overview

Service type: Diagnostic urodynamic testing

Typical site of service: Outpatient urology clinic or diagnostic testing center, where a patient voids into a calibrated uroflowmeter that records flow rate and total volume.

Clinical & Coding Specifications

Clinical Context

A typical patient is an adult presenting to a urology or primary care clinic with lower urinary tract symptoms such as weak urinary stream, hesitancy, intermittency, straining, or incomplete emptying. The clinician obtains a focused history and performs a focused genitourinary exam. Uroflowmetry (51736) is ordered to quantify maximum flow rate (Qmax), average flow rate, voided volume, and flow pattern. The patient is instructed to arrive with a comfortably full bladder or to drink fluids in clinic until adequate bladder volume is achieved. In the clinic workflow a trained medical assistant or nurse provides the patient a uroflowmeter cup in a private restroom, the patient voids directly into the device, and the device records flow versus time. Results are printed or uploaded to the electronic medical record and reviewed by the ordering provider, often alongside post-void residual measurement by bladder scan or catheterization if indicated. Typical sites of service are outpatient urology clinics, primary care offices with urology services, ambulatory surgical centers for perioperative assessment, and hospital outpatient departments when inpatient evaluation is required. The procedure is noninvasive, usually brief (minutes), and used for evaluation of benign prostatic hyperplasia, suspected bladder outlet obstruction, neurogenic bladder, and follow-up after intervention such as transurethral resection of the prostate (TURP) or sling procedures.

Coding Specifications

Modifier	Description	When to Use
`26`	Professional component	Use when billing only the physician interpretation/report of the uroflowmetry separate from technical equipment use.
`TC`	Technical component	Use when billing only the facility/equipment portion of the test.
`59`	Distinct procedural service	Use when `51736` is a distinct service from other procedures performed the same day (e.g., separate from cystoscopy).
`52`	Reduced services	Use when the uroflowmetry is performed but the study is incomplete or limited (reduced volume or interrupted tracing).
`53`	Discontinued procedure	Use when test was started but stopped for patient safety or intolerance.
`59`	(duplicate removed)	(duplicate)
`76`	Repeat procedure by same physician	Use when the same provider repeats uroflowmetry later the same day for clinical reasons.
`77`	Repeat procedure by another physician	Use when a different provider repeats the test on the same day.
`90`	Reference (outside) laboratory	Use when test interpretation or technical processing is performed by an outside laboratory service.
`91`	Repeat clinical diagnostic laboratory test	Use when uroflowmetry is repeated on the same day to confirm results.
`52`	(duplicate removed)	(duplicate)

Taxonomy Code	Specialty	Notes
`2084P0800X`	Urology	Urologists commonly order and interpret uroflowmetry.
`207R00000X`	Family Medicine	Family physicians may perform or order uroflowmetry in primary care settings.
`207P00000X`	Internal Medicine	Internists in outpatient clinics may evaluate LUTS and order the test.
`363L00000X`	Nurse Practitioner	NPs often perform and coordinate testing in ambulatory clinics.
`363A00000X`	Physician Assistant	PAs assist in performing and documenting uroflowmetry testing.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`N40.0`	Benign prostatic hyperplasia without lower urinary tract symptoms	BPH commonly affects flow rates; uroflowmetry helps assess obstruction severity.
`N40.1`	Benign prostatic hyperplasia with lower urinary tract symptoms	Correlates symptomatic BPH with objective flow measurements.
`N32.0`	Bladder-neck obstruction	Uroflowmetry can demonstrate obstructive flow patterns supporting this diagnosis.
`N31.9`	Neuromuscular dysfunction of bladder, unspecified	Neurogenic bladder often results in abnormal flow patterns measured by uroflowmetry.
`N39.3`	Stress incontinence (female)	Uroflowmetry may be used pre- and post-intervention to assess voiding dynamics.
`R35.0`	Frequency of micturition	Abnormal flow rates can accompany increased urinary frequency prompting testing.
`R39.11`	Weak stream	Direct indication for uroflowmetry to quantify peak and average flow rates.
`R33.9`	Urinary retention, unspecified	Uroflowmetry combined with post-void residual measurement assesses degree of retention.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`51798`	Measurement of post-voiding residual urine and/or bladder capacity, nonimaging (e.g., catheterization)	Often performed immediately after uroflowmetry to quantify residual volume and correlate flow results.
`51701`	Complex uroflowmetry, including quantitative measurement of voided volume and flow rate, with interpretation	Alternative or supplementary uroflowmetry code for more complex testing scenarios.
`52000`	Cystourethroscopy, diagnostic, with or without collection of specimen(s) by brushing or washing (separate procedure)	Performed when uroflowmetry suggests obstruction or hematuria requiring endoscopic evaluation.
`52204`	Cystourethroscopy, with biopsy	Used when visual abnormalities are found after abnormal uroflowmetry prompting cystoscopic biopsy.
`90901`	Biofeedback training, per 15 minutes	May be used in conjunction with uroflowmetry for pelvic floor or bladder training in select patients.

CPT 51725: Cystometrogram — Bladder Pressure and Capacity Test

CPT-51726-CYSTOMETRY-BLADDER-PRESSURE-TESTING

CPT 51726: Cystometry for Bladder Capacity and Pressure Measurement

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-51741-UROFLOWMETRY-URINARY-FLOW-MEASUREMENT

CPT 51741: Uroflowmetry (Urinary Flow Measurement)

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

CPT 51784: Anal or Urethral Sphincter Electrical Activity Testing

CPT-51785-ANAL-URETHRAL-SPHINCTER-ELECTROMYOGRAPHY

CPT 51785: Electromyography of Anal or Urethral Sphincter

CPT-51792-SPHINCTER-ELECTROMYOGRAPHY-ANAL-URETHRAL

CPT 51792: Electromyography of Anal or Urethral Sphincter Muscles

CPT-51797-VOIDING-PRESSURE-URODYNAMIC-TEST

CPT 51797: Voiding Pressure (Urodynamic) Measurement

Showing 1–10 of 11

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Jul 29, 2026.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.

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Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Modifier	Description	When to Use
`26`	Professional component	Use when billing only the physician interpretation/report of the uroflowmetry separate from technical equipment use.
`TC`	Technical component	Use when billing only the facility/equipment portion of the test.
`59`	Distinct procedural service	Use when `51736` is a distinct service from other procedures performed the same day (e.g., separate from cystoscopy).
`52`	Reduced services	Use when the uroflowmetry is performed but the study is incomplete or limited (reduced volume or interrupted tracing).
`53`	Discontinued procedure	Use when test was started but stopped for patient safety or intolerance.
`59`	(duplicate removed)	(duplicate)
`76`	Repeat procedure by same physician	Use when the same provider repeats uroflowmetry later the same day for clinical reasons.
`77`	Repeat procedure by another physician	Use when a different provider repeats the test on the same day.
`90`	Reference (outside) laboratory	Use when test interpretation or technical processing is performed by an outside laboratory service.
`91`	Repeat clinical diagnostic laboratory test	Use when uroflowmetry is repeated on the same day to confirm results.
`52`	(duplicate removed)	(duplicate)

Taxonomy Code	Specialty	Notes
`2084P0800X`	Urology	Urologists commonly order and interpret uroflowmetry.
`207R00000X`	Family Medicine	Family physicians may perform or order uroflowmetry in primary care settings.
`207P00000X`	Internal Medicine	Internists in outpatient clinics may evaluate LUTS and order the test.
`363L00000X`	Nurse Practitioner	NPs often perform and coordinate testing in ambulatory clinics.
`363A00000X`	Physician Assistant	PAs assist in performing and documenting uroflowmetry testing.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`N40.0`	Benign prostatic hyperplasia without lower urinary tract symptoms	BPH commonly affects flow rates; uroflowmetry helps assess obstruction severity.
`N40.1`	Benign prostatic hyperplasia with lower urinary tract symptoms	Correlates symptomatic BPH with objective flow measurements.
`N32.0`	Bladder-neck obstruction	Uroflowmetry can demonstrate obstructive flow patterns supporting this diagnosis.
`N31.9`	Neuromuscular dysfunction of bladder, unspecified	Neurogenic bladder often results in abnormal flow patterns measured by uroflowmetry.
`N39.3`	Stress incontinence (female)	Uroflowmetry may be used pre- and post-intervention to assess voiding dynamics.
`R35.0`	Frequency of micturition	Abnormal flow rates can accompany increased urinary frequency prompting testing.
`R39.11`	Weak stream	Direct indication for uroflowmetry to quantify peak and average flow rates.
`R33.9`	Urinary retention, unspecified	Uroflowmetry combined with post-void residual measurement assesses degree of retention.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`51798`	Measurement of post-voiding residual urine and/or bladder capacity, nonimaging (e.g., catheterization)	Often performed immediately after uroflowmetry to quantify residual volume and correlate flow results.
`51701`	Complex uroflowmetry, including quantitative measurement of voided volume and flow rate, with interpretation	Alternative or supplementary uroflowmetry code for more complex testing scenarios.
`52000`	Cystourethroscopy, diagnostic, with or without collection of specimen(s) by brushing or washing (separate procedure)	Performed when uroflowmetry suggests obstruction or hematuria requiring endoscopic evaluation.
`52204`	Cystourethroscopy, with biopsy	Used when visual abnormalities are found after abnormal uroflowmetry prompting cystoscopic biopsy.
`90901`	Biofeedback training, per 15 minutes	May be used in conjunction with uroflowmetry for pelvic floor or bladder training in select patients.

CPT 51725: Cystometrogram — Bladder Pressure and Capacity Test

CPT-51726-CYSTOMETRY-BLADDER-PRESSURE-TESTING

CPT 51726: Cystometry for Bladder Capacity and Pressure Measurement

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-51741-UROFLOWMETRY-URINARY-FLOW-MEASUREMENT

CPT 51741: Uroflowmetry (Urinary Flow Measurement)

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

CPT 51784: Anal or Urethral Sphincter Electrical Activity Testing

CPT-51785-ANAL-URETHRAL-SPHINCTER-ELECTROMYOGRAPHY

CPT 51785: Electromyography of Anal or Urethral Sphincter

CPT-51792-SPHINCTER-ELECTROMYOGRAPHY-ANAL-URETHRAL

CPT 51792: Electromyography of Anal or Urethral Sphincter Muscles

CPT-51797-VOIDING-PRESSURE-URODYNAMIC-TEST

CPT 51797: Voiding Pressure (Urodynamic) Measurement

Showing 1–10 of 11

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Jul 29, 2026.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

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CPT 51736: Uroflowmetry (Urodynamic Flow Study)

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Billing Code Overview

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CPT 51736: Uroflowmetry (Urodynamic Flow Study)

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Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References