CPT code 95939: Motor evoked potentials, upper and lower limbs2026 Medicare rate & RVUs in Illinois
Reports transcranial motor evoked-potential testing of both upper and lower limbs to assess central motor pathway function in a diagnostic evaluation.
Medicare pays $547.55–$607.37 for 95939 in the office in Illinois, from Rest of Illinois to Suburban Chicago, IL. 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 95939 covers
This study uses transcranial stimulation and records muscle responses in the arms and legs to evaluate motor pathways from the brain through the spinal cord. Neurologists and other clinicians trained in clinical neurophysiology may perform or interpret it, with trained technical staff assisting in physician offices and hospital settings. A clinician may order it when evaluating suspected dysfunction affecting central motor pathways, such as spinal cord disease.
Choose this code when the study covers both upper and lower limbs; codes 95928 and 95929 distinguish upper-limb-only and lower-limb-only studies. The report should identify the tested limb regions, recorded responses, and interpretation. CMS recognizes separately priced professional and technical components: report modifier 26 for interpretation alone, TC for equipment and staff, or no component modifier for the complete service. The code is priced as bilateral, so modifier 50 does not increase payment.
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 95939 pays more and less in Illinois
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
4 payment localities
$547.55 to $607.37
| Payment locality | Office | Facility |
|---|---|---|
| Chicago, IL | $598.75 | Unavailable |
| East St. Louis, IL | $553.39 | Unavailable |
| Rest of Illinois | $547.55 | Unavailable |
| Suburban Chicago, IL | $607.37 | Unavailable |
How the 95939 rate is calculated
Each of 95939’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 · 95939
RVUs × geographic indexes × conversion factor
Work2.19
2.19 RVUs× 1.000 GPCI
Practice expense15.30
15.30 RVUs× 1.000 GPCI
Malpractice0.15
0.15 RVUs× 1.000 GPCI
Adjusted RVUs
17.6400
Conversion factor
$33.4009
Medicare rate
$589.19
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 95939
The CMS indicators that decide how 95939 is paid alongside other services.
CMS payment indicators · 95939
Motor evoked potentials, upper and lower limbs
| Rule | CMS value | What it means |
|---|---|---|
| Global period | XXX | The global surgery concept doesn’t apply. |
| Multiple procedures | 0 | No multiple-procedure reduction. |
| Bilateral (modifier 50) | 2 | Already bilateral by definition: paid once at 100%. |
| Assistant at surgery (80/81/82/AS) | 0 | Not paid without supporting documentation. |
| 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
95939 without 26 · national office
$589.19
Motor evoked potentials, upper and lower limbs
95939-26 · Professional component
$117.57
Pays only the interpretation and report.
95939 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- 95928Motor evoked potentialsUpper limbs
- Use 95928 for a central motor evoked-potential study of the upper limbs only; use 95939 when both upper and lower limbs are tested.
- 95929Motor evoked studyLower limbs
- Use 95929 for a central motor evoked-potential study of the lower limbs only; use 95939 when both upper and lower limbs are tested.
- 95938Sensory evoked potentialsUpper and lower limbs
- Code 95938 evaluates somatosensory pathways in upper and lower limbs. Code 95939 evaluates motor pathways using transcranial stimulation.
95939 billing questions
When should I report this instead of 95928 or 95929?
Report this code when the motor evoked-potential study includes both upper and lower limbs. Code 95928 is for upper limbs, and 95929 is for lower limbs.
Should I append modifier 50?
No. CMS prices this code as bilateral, and modifier 50 does not increase payment.
How do I report the professional and technical components?
Use modifier 26 for the professional interpretation and TC for the technical service, including equipment and staff. Bill without a component modifier when reporting the complete service.
What documentation supports reporting this code?
Document that both upper and lower limbs were tested, the recorded motor responses, and the clinician's interpretation of the findings.
Can this be reported with somatosensory evoked-potential testing?
It may be reported with 95938 when both motor and somatosensory pathways are evaluated during the encounter. The record should support each distinct study.
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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