CPT code 51784: Sphincter EMG, nonneedle technique2026 Medicare rate & RVUs in Missouri
Nonneedle electromyography records anal or urinary sphincter muscle activity, commonly during evaluation of urinary incontinence, voiding dysfunction, or pelvic floor coordination.
Medicare pays $60.96–$64.58 for 51784 in the office in Missouri, from Rest of Missouri to Metropolitan St. Louis, MO. Which amount applies depends on the service address.
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
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On this page 9 sections
What 51784 covers
This test records electrical activity from the anal or urinary sphincter muscles without needle electrodes. In urology and urogynecology practices, a clinician or trained staff member typically places surface electrodes near the perineum or anal sphincter and records muscle activity during rest, contraction, or voiding. It can help assess sphincter coordination in patients with urinary incontinence, difficulty emptying the bladder, or suspected pelvic floor dysfunction, often as part of a broader urodynamic evaluation.
Report the study when nonneedle sphincter electromyography is performed; use the needle-study code when needle electrodes are used. Documentation should identify the muscle area studied, the nonneedle technique, the test findings, and the interpretation. CMS allows billing for the professional interpretation with modifier 26, the equipment and staff portion with modifier TC, or the global service without either modifier. When multiple procedures are performed in the same session, the highest-valued procedure is paid in full and the others are subject to the standard 50% multiple procedure reduction.
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 51784 pays more and less in Missouri
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
3 payment localities
$60.96 to $64.58
| Payment locality | Office | Facility |
|---|---|---|
| Metropolitan Kansas City, MO | $64.00 | Unavailable |
| Metropolitan St. Louis, MO | $64.58 | Unavailable |
| Rest of Missouri | $60.96 | Unavailable |
How the 51784 rate is calculated
Each of 51784’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.
How the rate is built · 51784
RVUs × geographic indexes × conversion factor
Work0.73
0.73 RVUs× 1.000 GPCI
Practice expense1.18
1.18 RVUs× 1.000 GPCI
Malpractice0.08
0.08 RVUs× 1.000 GPCI
Adjusted RVUs
1.9900
Conversion factor
$33.4009
Medicare rate
$66.47
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 51784
The CMS indicators that decide how 51784 is paid alongside other services.
CMS payment indicators · 51784
Sphincter EMG, nonneedle technique
| Rule | CMS value | What it means |
|---|---|---|
| Global period | XXX | The global surgery concept doesn’t apply. |
| Multiple procedures | 2 | Standard reduction: highest-valued procedure at 100%, others at 50%. |
| Bilateral (modifier 50) | 0 | The 150% bilateral adjustment doesn’t apply. |
| Assistant at surgery (80/81/82/AS) | 1 | Not paid (statutory restriction). |
| Co-surgeons (62) | 0 | Not permitted. |
| Team surgery (66) | 0 | Not permitted. |
| Professional/technical | 1 | Diagnostic test with separate professional (26) and technical (TC) components. |
What modifiers do to the payment
Modifier 26 · payment effect
With and without the modifier
51784 without 26 · national office
$66.47
Sphincter EMG, nonneedle technique
51784-26 · Professional component
$37.07
Pays only the interpretation and report.
51784 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- 51785Sphincter EMGNeedle electrode technique
- Both codes describe anal or urinary sphincter electromyography. Choose 51784 for a nonneedle technique and 51785 when needle electrodes are used.
- 51726CystometrogramElectronic pressure-volume testing
- 51726 measures bladder pressure and capacity during complex cystometry; 51784 records sphincter muscle electrical activity.
- 51741UroflowmetryComplex electronic flow study
- 51741 measures urinary flow and its pattern. It does not represent the sphincter electromyography service reported with 51784.
51784 billing questions
How does this differ from 51785?
This code is for sphincter electromyography performed without needle electrodes. Use 51785 when the study uses needle electrodes.
Can this be reported with cystometry?
It is commonly performed as part of a urodynamic evaluation that also includes cystometry. Document the electromyography service separately, and apply the CMS multiple procedure reduction when multiple procedures are performed in the same session.
Which modifiers identify the professional and technical portions?
Modifier 26 identifies the professional interpretation, and modifier TC identifies the equipment and staff portion. Report without either modifier for the global service.
What documentation supports reporting this study?
Record the sphincter area assessed, the nonneedle electrode technique, the patient's relevant activity during testing, and the findings and interpretation.
Does the multiple procedure reduction affect this code?
When it is performed with other procedures in the same session, CMS pays the highest-valued procedure in full and reduces the others to 50%.
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.
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