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CPT code 51784: Sphincter EMG, nonneedle technique2026 Medicare rate & RVUs in Iowa

Nonneedle electromyography records anal or urinary sphincter muscle activity, commonly during evaluation of urinary incontinence, voiding dysfunction, or pelvic floor coordination.

CMS RVU26DEffective Oct 1, 2026One payment locality131.3K Medicare services in 2024

In Iowa, Medicare pays $61.51 for 51784 in the office.

$61.51Office (non-facility)
Not available in this settingHospital or facility
−7.5%vs the national office rate ($66.47)

Check a contract rate as a % of Medicare · 51784 nationwide

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

We’ll open 51784 for the payment locality that covers the ZIP.

On this page 11 sections
  1. Rate in Iowa
  2. What 51784 covers
  3. Compared with other areas
  4. Rate map
  5. How it’s calculated
  6. Payment rules
  7. Related codes
  8. Rate history
  9. Where it applies
  10. Billing questions
  11. Sources

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.

How Iowa compares for 51784

Across 109 of 109 payment localities, the office rate for 51784 runs from $59.61 in Arkansas to $85.33 in San Benito County, CA. Iowa pays $61.51. The RVUs are the same everywhere; the geographic indexes change the dollars.

51784 in Iowa vs other payment areas
  1. Iowa · this page$61.51
  2. Los Angeles, CA · California$73.78+$12.27
  3. Washington, DC area · District of Columbia$75.10+$13.59
  4. Miami, FL · Florida$72.17+$10.66
  5. Chicago, IL · Illinois$70.30+$8.79
  6. Manhattan, NY · New York$75.98+$14.47
  7. Alaska · Alaska$80.02+$18.51

Other areas in Iowa first, then benchmark localities. Bars start at $0.

Every other payment area

51784 in every other Medicare payment locality
Payment localityOfficeFacility
AlabamaAlabama$60.38—
ArkansasArkansas$59.61—
ArizonaArizona$64.86—
Bakersfield, CACalifornia$69.67—
Chico, CACalifornia$69.43—
El Centro, CACalifornia$69.44—
Fresno, CACalifornia$69.43—
Hanford, CACalifornia$69.43—

51784 rates by state

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

MEWIVTNHMTNDMNMINYMARIWAIDWYSDIAILINOHPANJCTORNVUTCONEMOKYWVVAMDDECAAZNMKSOKARTNNCSCDCTXLAMSALGAFLAKHI

Explore a state

Local rates. Clear comparisons.

Hover or focus a tile to see its rate range. Select it to open the state’s fee schedule.

$59.61

$80.02

Color shows the midpoint of each state’s locality range.

View every state and territory as a table
51784 office rate range by state
State / territoryOffice rate rangeLocalities
AK$80.021
AL$60.381
AR$59.611
AZ$64.861
CA$69.43–$85.3329
CO$68.701
CT$70.551
DC$75.101
DE$65.851
FL$66.08–$72.173
GA$62.72–$67.712
GU$70.741
HI$70.741
IA$61.511
ID$61.911
IL$64.54–$70.304
IN$62.221
KS$61.361
KY$61.871
LA$61.82–$64.512
MA$68.40–$74.822
MD$66.97–$75.103
ME$62.30–$65.132
MI$63.38–$66.922
MN$65.731
MO$60.96–$64.583
MS$60.291
MT$66.461
NC$62.861
ND$64.881
NE$61.771
NH$67.751
NJ$71.33–$74.492
NM$63.731
NV$66.061
NY$63.70–$77.775
OH$63.061
OK$61.651
OR$65.52–$70.552
PA$63.09–$69.042
PR$66.861
RI$67.941
SC$63.071
SD$64.691
TN$61.641
TX$62.73–$68.508
UT$63.831
VA$65.01–$75.102
VI$66.861
VT$64.751
WA$68.24–$76.142
WI$62.961
WV$62.461
WY$65.771

See 51784 in every payment locality

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

Office or facility?

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.

The exact Iowa inputs and CMS source lines

PPRRVU2026_Oct_nonQPP.csv

6,075

Code
51784
Physician work
0.73
Practice expense
1.18
Malpractice
0.08

GPCI2026.csv

53

Locality
Iowa
Physician work
1.000
Practice expense
0.915
Malpractice
0.397
Office calculation for 51784 in Iowa
ComponentRVULocality factorAdjusted
Physician work0.73× 1.0000.7300
Practice expense1.18× 0.9151.0797
Malpractice0.08× 0.3970.0318
Total RVUs1.8415
Conversion factor× 33.4009

Office rate, Iowa$61.51

Office: (0.73 × 1 + 1.18 × 0.915 + 0.08 × 0.397) × $33.4009 = $61.51

Open 51784 in the RVU calculator

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

RuleCMS valueWhat it means
Global periodXXXThe global surgery concept doesn’t apply.
Multiple procedures2Standard reduction: highest-valued procedure at 100%, others at 50%.
Bilateral (modifier 50)0The 150% bilateral adjustment doesn’t apply.
Assistant at surgery (80/81/82/AS)1Not paid (statutory restriction).
Co-surgeons (62)0Not permitted.
Team surgery (66)0Not permitted.
Professional/technical1Diagnostic 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.

When to use modifier 26

Codes related to 51784

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

Codes related to 51784
CodeHow it relatesOffice range, Iowa
Same family
51785Sphincter EMG, needle electrode techniqueNeedle-electrode sphincter electromyography; select it when the study uses needles.$354.51
Often billed with
51726Cystometrogram, electronic pressure-volume testingComplex cystometry may be performed during the same urodynamic evaluation.$249.66
51728Urodynamic study, with voiding pressureCystometry with voiding pressure measurements may accompany sphincter electromyography.$310.11
51741Uroflowmetry, complex electronic flow studyElectro-uroflowmetry may be included in the same voiding-function evaluation.$14.02

How 51784 has changed in Iowa

51784 · Office / nonfacility

$61.51

Effective 2026-10-01

The base rate is $3.73 higher than on 2025-10-01, moving from $57.78 to $61.51 (6.5%).

It is unchanged from the immediately preceding available release, effective 2026-07-01.

Base rate by release · bars start at $0 · select a bar to compare

One bar per available release, ordered by effective date. Missing rates remain gaps. These comparisons hold the code, setting and locality identifiers constant; they do not isolate which policy or input caused a change.

What changed, release by release

  1. January 1, 2026

    RVU26A

    $57.78changed to$61.51

    • Conversion factor 32.3465 changed to 33.4009
    • Work RVU 0.75 changed to 0.73
    • Practice expense RVU 1.10 changed to 1.18
    • Malpractice RVU 0.07 changed to 0.08
    • Practice expense GPCI 0.913 changed to 0.915
    • Malpractice GPCI 0.457 changed to 0.397

    Held through RVU26B, RVU26C, RVU26D.

  2. January 1, 2025

    RVU25A

    $59.61changed to$57.78

    • Conversion factor 33.2875 changed to 32.3465
    • Malpractice RVU 0.08 changed to 0.07

    Held through RVU25B, RVU25C, RVU25D.

  3. March 9, 2024

    RVU24AR

    $58.64changed to$59.61

    • Conversion factor 32.7442 changed to 33.2875

    Held through RVU24B, RVU24C, RVU24D.

  4. January 1, 2024

    RVU24A

    $59.92changed to$58.64

    • Conversion factor 33.8872 changed to 32.7442
    • Practice expense RVU 1.08 changed to 1.10
    • Practice expense GPCI 0.910 changed to 0.913
    • Malpractice GPCI 0.441 changed to 0.457

  5. January 1, 2023

    RVU23A

    $60.55changed to$59.92

    • Conversion factor 34.6062 changed to 33.8872
    • Practice expense RVU 1.06 changed to 1.08
    • Malpractice RVU 0.09 changed to 0.08
    • Practice expense GPCI 0.907 changed to 0.910
    • Malpractice GPCI 0.425 changed to 0.441

    Held through RVU23B, RVU23C, RVU23D.

  6. January 1, 2022

    RVU22A

    $62.34changed to$60.55

    • Conversion factor 34.8931 changed to 34.6062
    • Practice expense RVU 1.11 changed to 1.06
    • Malpractice RVU 0.07 changed to 0.09

    Held through RVU22B, RVU22C, RVU22D.

  7. January 1, 2021

    RVU21A

    $63.80changed to$62.34

    • Conversion factor 36.0896 changed to 34.8931
    • Practice expense RVU 1.08 changed to 1.11
    • Malpractice RVU 0.09 changed to 0.07
    • Malpractice GPCI 0.424 changed to 0.425

    Held through RVU21B, RVU21C, RVU21D.

  8. January 1, 2020

    RVU20A

    $64.38changed to$63.80

    • Conversion factor 36.0391 changed to 36.0896
    • Practice expense RVU 1.11 changed to 1.08
    • Malpractice RVU 0.07 changed to 0.09
    • Malpractice GPCI 0.423 changed to 0.424

    Held through RVU20B, RVU20C, RVU20D.

  9. January 1, 2019

    RVU19A

    $65.94changed to$64.38

    • Conversion factor 35.9996 changed to 36.0391
    • Practice expense RVU 1.16 changed to 1.11

    Held through RVU19B, RVU19C, RVU19D.

  10. January 1, 2018

    RVU18AR1

    $65.29changed to$65.94

    • Conversion factor 35.8887 changed to 35.9996
    • Practice expense RVU 1.15 changed to 1.16
    • Practice expense GPCI 0.902 changed to 0.907
    • Malpractice GPCI 0.458 changed to 0.423

    Held through RVU18B, RVU18C, RVU18D.

  11. January 1, 2017

    RVU17A

    $178.05changed to$65.29

    • Conversion factor 35.8043 changed to 35.8887
    • Work RVU 1.53 changed to 0.75
    • Practice expense RVU 3.76 changed to 1.15
    • Malpractice RVU 0.15 changed to 0.07
    • Practice expense GPCI 0.896 changed to 0.902
    • Malpractice GPCI 0.493 changed to 0.458

    Held through RVU17B, RVU17C, RVU17D.

  12. January 1, 2016

    RVU16A

    $178.69changed to$178.05

    • Conversion factor 35.9335 changed to 35.8043

    Held through RVU16B, RVU16C, RVU16D.

  13. July 1, 2015

    RVU15C

    $177.80changed to$178.69

    • Conversion factor 35.7547 changed to 35.9335

    Held through RVU15D.

  14. January 1, 2015

    RVU15A

    $175.40changed to$177.80

    • Conversion factor 35.8228 changed to 35.7547
    • Practice expense RVU 3.71 changed to 3.76
    • Malpractice RVU 0.12 changed to 0.15
    • Practice expense GPCI 0.892 changed to 0.896
    • Malpractice GPCI 0.475 changed to 0.493

    Held through RVU15B.

  15. January 1, 2014

    RVU14A

    $176.60changed to$175.40

    • Conversion factor 34.0230 changed to 35.8228
    • Practice expense RVU 4.06 changed to 3.71
    • Malpractice RVU 0.13 changed to 0.12
    • Practice expense GPCI 0.887 changed to 0.892
    • Malpractice GPCI 0.456 changed to 0.475

    Held through RVU14B, RVU14C, RVU14D.

  16. January 1, 2013

    RVU13AR

    Earliest loaded release: $176.60

    Held through RVU13B, RVU13C, RVU13D.

Rates in every CMS release
Effective fromOfficeFacilityCMS release
2026-10-01$61.51Not available in this settingRVU26D
2026-07-01$61.51Not available in this settingRVU26C
2026-04-01$61.51Not available in this settingRVU26B
2026-01-01$61.51Not available in this settingRVU26A
2025-10-01$57.78Not available in this settingRVU25D
2025-07-01$57.78Not available in this settingRVU25C
2025-04-01$57.78Not available in this settingRVU25B
2025-01-01$57.78Not available in this settingRVU25A
2024-10-01$59.61Not available in this settingRVU24D
2024-07-01$59.61Not available in this settingRVU24C
2024-04-01$59.61Not available in this settingRVU24B
2024-03-09$59.61Not available in this settingRVU24AR
2024-01-01$58.64Not available in this settingRVU24A
2023-10-01$59.92Not available in this settingRVU23D
2023-07-01$59.92Not available in this settingRVU23C
2023-04-01$59.92Not available in this settingRVU23B
2023-01-01$59.92Not available in this settingRVU23A
2022-10-01$60.55Not available in this settingRVU22D
2022-07-01$60.55Not available in this settingRVU22C
2022-04-01$60.55Not available in this settingRVU22B
2022-01-01$60.55Not available in this settingRVU22A
2021-10-01$62.34Not available in this settingRVU21D
2021-07-01$62.34Not available in this settingRVU21C
2021-04-01$62.34Not available in this settingRVU21B
2021-01-01$62.34Not available in this settingRVU21A
2020-10-01$63.80Not available in this settingRVU20D
2020-07-01$63.80Not available in this settingRVU20C
2020-04-01$63.80Not available in this settingRVU20B
2020-01-01$63.80Not available in this settingRVU20A
2019-10-01$64.38Not available in this settingRVU19D
2019-07-01$64.38Not available in this settingRVU19C
2019-04-01$64.38Not available in this settingRVU19B
2019-01-01$64.38Not available in this settingRVU19A
2018-10-01$65.94Not available in this settingRVU18D
2018-07-01$65.94Not available in this settingRVU18C
2018-04-01$65.94Not available in this settingRVU18B
2018-01-01$65.94Not available in this settingRVU18AR1
2017-10-01$65.29Not available in this settingRVU17D
2017-07-01$65.29Not available in this settingRVU17C
2017-04-01$65.29Not available in this settingRVU17B
2017-01-01$65.29Not available in this settingRVU17A
2016-10-01$178.05Not available in this settingRVU16D
2016-07-01$178.05Not available in this settingRVU16C
2016-04-01$178.05Not available in this settingRVU16B
2016-01-01$178.05Not available in this settingRVU16A
2015-10-01$178.69Not available in this settingRVU15D
2015-07-01$178.69Not available in this settingRVU15C
2015-04-01$177.80Not available in this settingRVU15B
2015-01-01$177.80Not available in this settingRVU15A
2014-10-01$175.40Not available in this settingRVU14D
2014-07-01$175.40Not available in this settingRVU14C
2014-04-01$175.40Not available in this settingRVU14B
2014-01-01$175.40Not available in this settingRVU14A
2013-10-01$176.60Not available in this settingRVU13D
2013-07-01$176.60Not available in this settingRVU13C
2013-04-01$176.60Not available in this settingRVU13B
2013-01-01$176.60Not available in this settingRVU13AR

Price 51784 for an earlier date of service

Where the Iowa rate applies

Iowa is a Medicare payment area, not a city. Our Census mapping connects it to 1026 cities and communities in Iowa. Some span more than one payment area; confirm with the service ZIP.

  • Ackley
  • Ackworth
  • Adair
  • Adel
  • Afton
  • Agency
  • Ainsworth
  • Akron

Browse all communities in Iowa

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.

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

Show the CMS file lines behind this rate
RVUs for 51784PPRRVU2026_Oct_nonQPP.csv, line 6,075 (RVU26D)
Geographic factors for IowaGPCI2026.csv, line 53 (RVU26D)

Open CMS sourceHow we calculate rates

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