Clinical Policy: Urodynamic Testing
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Defines medical necessity criteria, coding, and indications for urodynamic studies used in the evaluation of voiding dysfunction for members/enrollees of Centene-affiliated health plans (Arizona Complete Health).
Added CPT 51792 to CPT coding table.
Moved ICD-10 N40.3 from ICD-10 Table 2 to ICD-10 Table 1 and added multiple ICD-10 codes to the list that support medical necessity.
Updated I.D.6 language to 'Abnormal post void residual urine volume.'
Code update: ICD-10 N40.1 and R35.1 no longer specific to 51798 and moved to list of codes that support medical necessity.
Coverage and Medical Necessity Criteria
Not Medically Necessary
The following are considered not medically necessary:
These are explicit not medically necessary rules and may result in denial.
Referenced criteria (partial)
Policy contains multiple medical necessity criteria sections (e.g., I.D.1, I.D.5, I.D.6) and refers to ICD-10 tables supporting medical necessity.
Wording updated in most recent annual review and listed as a criterion for testing
Added as a distinct criterion in prior revisions
The use of urodynamic testing for screening asymptomatic patients is considered not medically necessary except in two specified situations: evaluation of neurogenic bladder and assessment of urological abnormalities associated with complex anorectal malformation. This exclusion applies to routine screening of asymptomatic individuals and aligns with the policy's intent to reserve invasive diagnostic testing for patients with symptoms or specific clinical indications.
There are no additional explicit clinical exclusions listed in these sections. Coverage and claim determinations remain subject to the member's benefit terms, plan-level administrative policies, and the Important Reminder that this policy is a guide to medical necessity and does not replace the coverage documents or applicable state and federal requirements.
Performing more than one cystometrogram (CPT 51725 or 51726) or more than one uroflowmetry study (CPT 51736 or 51741) during the same patient visit is considered not medically necessary and may be denied.
This portion of the document does not list additional specific ‘not medically necessary’ conditions beyond those already stated; adjudication of claims and denials for services will be governed by medical necessity determinations, benefit limitations, and applicable plan policies as described in the Important Reminder.
Procedure and Diagnosis Coding
| 51725 | Simple cystometrogram (CMG) (eg, spinal manometer). |
| 51726 | Complex cystometrogram (ie, calibrated electronic equipment). |
| 51727 | Complex cystometrogram (ie, calibrated electronic equipment); with urethral pressure profile studies. |
| 51728 | Complex cystometrogram (ie, calibrated electronic equipment); with voiding pressure studies. |
| 51729 | Complex cystometrogram (ie, calibrated electronic equipment); with voiding pressure studies and urethral pressure profile studies. |
| 51736 | Simple uroflowmetry (UFR) (eg, stop-watch flow rate, mechanical uroflowmeter). |
| 51741 | Complex uroflowmetry (eg, calibrated electronic equipment). |
| 51792 | Stimulus evoked response (Eg, measurement of bulbocavernous reflex latency time). |
| 51797 | Voiding pressure studies, intra-abdominal (ie, rectal, gastric, intraperitoneal). |
| 51798 | Measurement of post-voiding residual urine and/or bladder capacity by ultrasound, non-imaging. |
| A18.13 | Tuberculosis of other urinary organs. |
| A52.10 | Symptomatic neurosyphilis, unspecified. |
| A52.11 | Tabes dorsalis. |
| A52.12 | Other cerebrospinal syphilis. |
| A52.13 | Late syphilitic meningitis. |
| A52.14 | Late syphilitic encephalitis. |
| A52.15 | Late syphilitic neuropathy. |
| A52.16 | Charcot's arthropathy (tabetic). |
| A52.17 | General paresis. |
| A52.19 | Other symptomatic neurosyphilis. |
| 51792 | CPT code added to CPT coding table |
| N40.1 | ICD-10 code listed as supporting medical necessity |
| R35.1 | ICD-10 code listed as supporting medical necessity |
| N40.3 | ICD-10 code moved from Table 2 to Table 1 |
| A18.13 | ICD-10 code listed as supporting medical necessity |
| G82.21 | ICD-10 code listed as supporting medical necessity |
| G82.22 | ICD-10 code listed as supporting medical necessity |
| R39.11 | ICD-10 code listed as supporting medical necessity |
| S14.0XXA | ICD-10 code listed as supporting medical necessity |
| S14.9XXS | ICD-10 code listed as supporting medical necessity |
| S24.0XXA | ICD-10 code listed as supporting medical necessity |
| A52.10 | ICD-10 code listed as supporting medical necessity |
| C61 | ICD-10 code listed as supporting medical necessity |
| G20.A1 | ICD-10 code listed as supporting medical necessity |
| G20.A2 | ICD-10 code listed as supporting medical necessity |
| N13.0 | ICD-10 code listed as supporting medical necessity |
| N35.010 | ICD-10 code listed as supporting medical necessity |
| N36.0 | ICD-10 code listed as supporting medical necessity |
| R39.12 | ICD-10 code listed as supporting medical necessity |
| T79.5XXA | ICD-10 code listed as supporting medical necessity |
Provider Requirements, Documentation, and Billing Guidance
Procedure codes require supporting diagnosis
Procedure codes listed in the policy must be billed with diagnosis code(s) that support medical necessity. Coverage may be provided only when CPT codes are accompanied by an appropriate supporting ICD-10-CM diagnosis that justifies the urodynamic testing.
- Affected CPT codes require a supporting diagnosis on the claim.
- See coding table and ICD-10 list in the policy for diagnoses that support medical necessity.
Screening in asymptomatic patients
Urodynamic testing is not appropriate as a screening tool in asymptomatic patients. Testing for screening purposes is considered not medically necessary except when evaluating neurogenic bladder or urologic abnormalities associated with complex anorectal malformation.
- Use of urodynamic testing for asymptomatic screening is not medically necessary, except as specified (neurogenic bladder, complex anorectal malformation).
State/Medicare conformity note
When state Medicaid provisions or Medicare NCDs/LCDs conflict with this clinical policy, the state Medicaid or Medicare provisions take precedence. Providers should review applicable state Medicaid manuals and Medicare coverage determinations prior to applying this policy.
- For Medicaid members/enrollees, state Medicaid coverage provisions override this clinical policy where conflicts exist.
- For Medicare members/enrollees, review applicable NCDs, LCDs, and Medicare Coverage Articles (CMS website) for consistency before applying this policy.
Pre-test evaluation required
An initial clinical evaluation is required before performing invasive urodynamic testing. At minimum, this pre-test evaluation must include an appropriate history, physical examination, and urinalysis with microscopy; treat any infection and confirm effectiveness of treatment prior to urodynamic testing.
- Minimum pre-test evaluation: history, physical exam, and urinalysis with microscopy.
- If infection is present, it should be treated and response observed before invasive testing.
No explicit step therapy requirements
This policy does not specify any explicit step therapy requirements for urodynamic testing. Conservative or empiric non-invasive treatments (e.g., pelvic muscle exercises, behavioral therapies, pharmacotherapy) may be instituted without urodynamic testing, but no formal step therapy sequence is mandated by this policy.
- No explicit step therapy requirements are specified in this policy.
- Conservative/non-invasive treatments may be tried per clinical judgment prior to invasive testing, but this is not framed as a required step-therapy protocol.
Clinical Background and Guideline References
Lower urinary tract symptoms (LUTS) and urinary incontinence are common clinical problems with overlapping presentations. Urodynamic studies (including cystometrograms, uroflowmetry, urethral pressure profiles and voiding pressure studies) are diagnostic procedures that measure bladder and abdominal pressures during filling and voiding to help distinguish causes such as bladder outlet obstruction versus other dysfunction. Because many urodynamic tests are invasive and carry risks (for example, infection, trauma, and pain), testing is intended to supplement an initial clinical evaluation and is performed when additional diagnostic information will affect management decisions.
Definitions of Procedures and Terms
Policy Changes and Revision History
CPT 51792 was added to the CPT coding table.
I.D.6 language updated to 'Abnormal post void residual urine volume.'
ICD-10 code N40.3 was moved from ICD-10 Table 2 to ICD-10 Table 1 and multiple ICD-10 codes were added to lists supporting medical necessity.
ICD-10 N40.1 and R35.1 were removed as codes specific to CPT 51798 and moved to the broader list of codes that support medical necessity; additional ICD-10 codes (A18.13, G82.21, G82.22, R39.11, S14.0XXA–S14.9XXS, S24.0XXA–S24.9XXS) were added.
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