CurrentAmerican Specialty HealthPolicy N/A

Electric Stimulation for Pain, Swelling and Function in a Clinic Setting

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Coverage of outpatient clinic-based electrical stimulation for pain, swelling, muscle re-education, and disuse atrophy, subject to applicable benefit plan terms and covered codes.

Policy Summary

PayerAmerican Specialty Health

PolicyElectric Stimulation for Pain, Swelling and Function in a Clinic Setting

Policy CodePolicy N/A

Change TypeNo material change

Effective DateAug 15, 2026

Next Review DateAug 15, 2027

Key ActionDocument the patient's response to electrical stimulation and specify the stimulation type and electrode placement.

SourceLink

POLICY UPDATE CHANGES

No material clinical or coverage changes in this revision.

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CurrentAmerican Specialty HealthPolicy N/A

Electric Stimulation for Pain, Swelling and Function in a Clinic Setting

Customize your policy alerts

Sign up for all american_specialty_health policy alerts

Know when american_specialty_health releases new policies or updates existing guidance.

Monitor payer policy activity

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Coverage of outpatient clinic-based electrical stimulation for pain, swelling, muscle re-education, and disuse atrophy, subject to applicable benefit plan terms and covered codes.

Policy Summary

PayerAmerican Specialty Health

PolicyElectric Stimulation for Pain, Swelling and Function in a Clinic Setting

Policy CodePolicy N/A

Change TypeNo material change

Effective DateAug 15, 2026

Next Review DateAug 15, 2027

Key ActionDocument the patient's response to electrical stimulation and specify the stimulation type and electrode placement.

SourceLink

POLICY UPDATE CHANGES

No material clinical or coverage changes in this revision.

Up to 2 weeksMaximum short-term use for pain and swelling

4Medically necessary billing codes

2Qualifying causes of NMES-treated disuse atrophy

13Experimental or unproven electrical stimulation treatments

Medical Necessity and Coverage Criteria

Electrical Stimulation for Pain and Swelling

Covered as medically necessary when ALL of the following are met:

ALL of the following

Electric stimulation (e.g., TENS or EMS) is prescribed as part of a comprehensive treatment program for pain and swelling in a clinic setting.
Treatment is provided under the direct supervision of a physical therapist or similar professional.
Treatment is used short term only.≤ 2 weeks
Medical records document a response to electrical stimulation, including specific treatment parameters such as the type of stimulation (e.g., low- or high-frequency TENS) and electrode placement.

NMES for Disuse Atrophy

NMES is medically necessary for disuse atrophy when ALL of the following are met:

ALL of the following

The nerve to the affected muscle is intact.
NMES is used only in conjunction with active exercise.
ONE of the following non-neurological causes of disuse atrophy applies:
- Major hip or knee surgery with failure to respond to basic therapeutic exercises initiated in physical therapy or rehabilitation.
- Previous immobilization of an extremity, such as casting or splinting of an arm or leg.

Neurological Conditions

The reviewed literature identifies potential benefit for selected neurological applications, particularly after stroke; evidence varies by modality, outcome, and comparison.

Potentially beneficial neurological applications include:

Contralaterally controlled functional electrical stimulation (CCFES) after stroke, which improved Fugl-Meyer assessment, active range of motion, modified Barthel Index, Motricity Index, surface electromyography, and Functional Ambulation Category compared with routine rehabilitation or routine electrical stimulation; no significant improvement was shown on the Action Research Arm Test.
Electrical stimulation combined with conventional rehabilitation for foot drop after stroke, which improved ankle-dorsiflexion range of motion and lower-extremity Fugl-Meyer scores, with greater benefit generally observed during the recovery phase (1–6 months) than in acute or sequelae phases.
Cyclical electrical stimulation (CES) after stroke to increase voluntary strength, with high-certainty evidence of a moderate effect compared with sham or no intervention and carryover to activity.
Functional electrical stimulation (FES) after stroke to improve activity, with moderate-certainty evidence of a moderate effect compared with sham or no intervention and high-certainty evidence of a small effect compared with practice of the same activity without stimulation.

Dysphagia — Insufficient, Uncertain, or Limited Evidence

The evidence for electrical stimulation in dysphagia is insufficient, inconsistent, limited, or uncertain; findings do not establish a definitive treatment benefit across conditions or modalities.

ALL of the following

Evidence for electrical stimulation, including DPNS, FES, and NMES, is insufficient to support effectiveness for dysphagia; DPNS-specific peer-reviewed evidence was not identified.
Small cohort and comparative studies have reported mixed results: one non-concurrent cohort favored transcutaneous electrical stimulation over traditional therapy, while another study found no significant difference between VitalStim and traditional swallowing therapy.
Reviews of NMES identified methodological limitations and predominantly exploratory studies; high-quality controlled trials are needed, and evidence for stimulation of the palate, faucial pillars, pharynx, or intramuscular protocols is absent or insufficient.
Evidence in acute or subacute post-stroke dysphagia remains insufficient for functional outcomes and mortality, although pharyngeal electrical stimulation reduced pharyngeal transit time in one review.

Heart Conditions

The reviewed literature does not support NMES for treatment of heart failure.

ALL of the following

NMES is not supported for heart failure because studies are limited by small or unrepresentative populations, heterogeneous protocols and muscle groups, varied comparators, and conflicting outcomes, including adverse events.
Where improvement in aerobic capacity, oxygen uptake, or muscle strength was reported, conventional exercise therapy generally produced greater improvement in peak oxygen uptake; additional studies are needed to establish clinical utility.

Pelvic Floor Stimulation

Evidence for pelvic floor stimulation remains modality- and comparator-dependent, with low-quality, inconclusive, or uncertain findings.

ALL of the following

Electrical stimulation may improve incontinence-specific quality of life compared with no treatment, but little or no difference was found compared with pelvic floor muscle training (PFMT), and the benefit of adding electrical stimulation to PFMT is uncertain.
Comparisons with vaginal cones, PFMT plus vaginal cones, drug therapy, different electrical-stimulation types, or surgery are uncertain or inconclusive.
Magnetic stimulation has not shown convincing benefit for pelvic floor dysfunction, chronic pelvic floor pain, detrusor overactivity, or overactive bladder; trials comparing magnetic stimulation with sham showed no significant improvement in outcomes, quality of life, or leakage.
In women unable to voluntarily contract pelvic floor muscles, an eight-week intravaginal electrical-stimulation regimen with attempted contractions improved voluntary contraction ability and urinary-incontinence impact versus no intervention, but estimates were imprecise and effects could not be confirmed as clinically worthwhile.

Electrical stimulation, except NMES, is contraindicated when applied to an area with a sensory deficit. Decreased or absent sensation prevents the patient from providing the feedback needed for safe and effective application to the affected area. Treatment in related areas without sensory deficits may be appropriate.

The following electrical stimulation devices, therapies, and treatments are considered experimental, investigational, or unproven for treatment of any condition: cranial electrotherapy stimulation; Deep Pharyngeal Neuromuscular Stimulation (DPNS); Hako-Med treatments; H-WAVE® stimulation; microcurrent electrical nerve stimulation (MENS) therapy; microcurrent point stimulation; Neufit Neubie device; NMES/electrical stimulation, including the Guardian dysphagia dual chamber unit and VitalStim Therapy device; pelvic floor stimulation, including electric and magnetic stimulation; Percutaneous Electrical Nerve Stimulation (PENS) and Percutaneous Neuromodulation Therapy (PNT); RST-SANEXAS neoGEN® Electric cell-Signaling Treatments (EcST); transcutaneous electrical modulation pain reprocessing (TEMPR), including Scrambler therapy and Calmare®; and threshold electrical stimulation.

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NMES is not supported by the reviewed literature for treatment of heart failure. Although some studies reported improvements in aerobic capacity, peak oxygen uptake, or muscle strength, the evidence is limited by heterogeneous protocols, patient populations, muscle groups, and comparators; outcomes and adverse events were conflicting, and conventional exercise generally produced greater improvement in peak oxygen uptake.

Covered Codes and Service Limits

Considered Medically Necessary CPT CodesCPTCovered

97014	Application of a modality to 1 or more areas; electrical stimulation (unattended)
97032	Application of a modality to 1 or more areas; electrical stimulation (manual), each 15 minutes
97032	Application of a modality to 1 or more areas; electrical stimulation (manual), each 15 minutes

Considered Medically Necessary HCPCS CodesHCPCSCovered

G0283

Electrical stimulation (unattended), to one or more areas for indication(s) other than wound care, as part of a therapy plan of care

Short-Term Clinic Electrical Stimulation

SettingClinic setting under the direct supervision of a physical therapist or similar professional

PurposePain and swelling as part of a comprehensive treatment program

Maximum durationShort term, up to 2 weeks

Documentation, Billing, and Denial Risks

Documentation Required

Document Treatment Response and Parameters

Document the patient’s response to electrical stimulation in the medical record, including the specific stimulation parameters used. Parameters should identify the type of stimulation, such as low- or high-frequency TENS, and electrode placement.

Record treatment response.
Record stimulation type and frequency, including low- or high-frequency TENS when applicable.
Record electrode placement and other relevant stimulation parameters.

Documentation Required

Support NMES Disuse Atrophy Criteria

For NMES used to treat disuse atrophy, document that the nerve to the muscle is intact, that the atrophy results from a qualifying non-neurological cause, and that NMES is used only with active exercise.

Document intact nerve supply to the affected muscle.
Document one qualifying non-neurological cause: major hip or knee surgery with failure to respond to basic therapeutic exercises initiated in physical therapy or rehabilitation, or previous immobilization of an extremity, such as casting or splinting.

Electrical Stimulation Therapy Overview

Electrical stimulation therapy applies electrical current through electrodes to an affected body area. In outpatient rehabilitation, it may be used for pain relief, swelling reduction, muscle re-education, or healing enhancement. Transcutaneous electrical nerve stimulation (TENS) is used primarily for pain, while neuromuscular electrical stimulation (NMES) delivers current to targeted muscles to elicit contraction, support neuromuscular re-education, improve motor-unit recruitment, and prevent or reduce disuse atrophy. NMES is generally used as part of a comprehensive rehabilitation program.

Electrical Stimulation Modalities

Transcutaneous Electrical Nerve Stimulation (TENS)

DeviceBattery-operated device

DeliveryElectrical pulses delivered through wired electrodes placed on the skin at the site of pain

ParametersSelectable parameters include pulse rate and pulse width; stimulation may be high or low frequency

Neuromuscular Electrical Stimulation (NMES)

ApplicationElectrical current delivered through skin electrodes to targeted muscles

Primary effectElicits muscle contraction

Rehabilitation role

Policy Summary

PayerAmerican Specialty Health

PolicyElectric Stimulation for Pain, Swelling and Function in a Clinic Setting

Policy CodePolicy N/A

Change TypeNo material change

Effective DateAug 15, 2026

Next Review DateAug 15, 2027

Key ActionDocument the patient's response to electrical stimulation and specify the stimulation type and electrode placement.

SourceLink

On This Page

Some meta-analyses reported benefit from NMES added to swallowing therapy, particularly short-term post-stroke outcomes, but found insufficient evidence that NMES alone is superior to swallowing therapy; other comparisons showed comparable outcomes.

In acquired brain injury, NMES plus conventional therapy improved some short-term measures, but both NMES and sham groups improved similarly at three months and aspiration persisted in both groups.

More recent reviews reported improvements in selected post-stroke outcomes such as functional oral intake, penetration-aspiration, and swallowing-related quality of life, but not consistently across water-swallowing, salivary-swallowing, or dysphagia-severity measures; the evidence base remains limited.

For Parkinson’s disease, evidence regarding NMES plus speech-language therapy versus sham NMES plus speech-language therapy is very uncertain for swallowing safety and efficiency.

Document concurrent active exercise.

Billing Rule

Use Covered Diagnoses and Procedure Codes

Submit claims using the most appropriate covered diagnosis and procedure or billing codes in effect on the submission date. Services billed for non-covered conditions or diagnoses, or without covered codes under this policy, will be denied as not covered.

Use covered diagnosis and/or procedure codes identified by the policy.
Use codes current as of the effective date of the submission.
Confirm that the billed condition or diagnosis is covered before submitting the claim.

Denial Risk

Experimental Electrical Stimulation

Do not bill the following electrical stimulation devices, therapies, or treatments as covered for any condition; the policy designates them experimental, investigational, or unproven.

Cranial electrotherapy stimulation
Deep Pharyngeal Neuromuscular Stimulation (DPNS)
Hako-Med treatments
H-WAVE® stimulation
Microcurrent electrical nerve stimulation (MENS) therapy
Microcurrent point stimulation
Neufit Neubie device
NMES/electrical stimulation, including the Guardian dysphagia dual chamber unit and VitalStim Therapy device
Pelvic floor stimulation, including electric and magnetic stimulation
Percutaneous Electrical Nerve Stimulation (PENS) and Percutaneous Neuromodulation Therapy (PNT)
RST-SANEXAS neoGEN® Electric cell-Signaling Treatments (EcST)
Transcutaneous electrical modulation pain reprocessing (TEMPR), including Scrambler therapy and Calmare®
Threshold Electrical Stimulation

Denial Risk

Sensory Deficit Application

Electrical stimulation other than NMES is contraindicated when applied to areas with decreased or absent sensation because sensory deficits prevent the patient from providing the feedback needed for safe and effective application. Stimulation may be appropriate in related areas that do not have sensory deficits.

Screen and document sensory status before applying non-NMES electrical stimulation.
Do not apply non-NMES electrical stimulation directly to areas with sensory deficits.
Consider only related areas without sensory deficits when clinically appropriate.

Promotes neuromuscular re-education and motor-unit recruitment and may prevent or diminish disuse atrophy

Functional Electrical Stimulation (FES)

Relationship to NMESA form of neuromuscular electrical stimulation

ApplicationActivates paralyzed or weak muscles in a precise sequence

PurposeEnhances functional activity, particularly in neurologically impaired individuals

Electrical Stimulation Therapy

MethodElectrodes are applied to the affected body area to deliver electrical current

Rehabilitation usesMuscle re-education, pain relief, reduction of swelling, and healing enhancement

Policy settingThe policy focuses on outpatient clinic use for pain, swelling, and function

TENS: Mechanism and Clinical Definition

Clinical typeNonpharmacological intervention for reducing pain and hyperalgesia

Neural activationActivates large-diameter afferent fibers and a complex neuronal network

MechanismAfferent input activates descending inhibitory systems in the central nervous system, including pathways involving the periaqueductal gray, rostral ventromedial medulla, and spinal cord

High-Frequency TENS (HF TENS)

DefinitionTENS delivered at a high frequency

Receptor activityActivates opioid receptors different from those activated by low-frequency TENS

Clinical distinctionMay be more effective for people taking opioids; analgesia is provided when applied at a strong, non-painful intensity

Low-Frequency TENS (LF TENS)

DefinitionTENS delivered at a low frequency

Receptor activityActivates opioid receptors different from those activated by high-frequency TENS

Clinical characteristicCan provide analgesia when applied at a strong, non-painful intensity

Percutaneous Electrical Nerve Stimulation (PENS)

DeliveryElectrical stimulation delivered through needles

Clinical comparisonEvaluated in comparison with TENS for musculoskeletal pain

Comparative findingIn lower-risk-of-bias analyses, no difference was observed between PENS and TENS for pain intensity

TES

AbbreviationTES

Full termThreshold electrical stimulation

Evidence contextIn ambulatory children with cerebral palsy, one 12-month trial found no significant clinical effect compared with placebo

IFC

AbbreviationIFC

Full termInterferential current

Evidence contextThe literature includes case reports, case series, and small randomized trials, while large long-term comparative trials are lacking

HVPS

AbbreviationHVPS

Full termHigh-voltage pulsed stimulation

Clinical contextThe literature describes its use for edema control, including investigation of acute edema formation

PENS

AbbreviationPENS

Full termPercutaneous electrical nerve stimulation

Delivery methodElectrical stimulation delivered percutaneously through needles

NMES

AbbreviationNMES

Full termNeuromuscular electrical stimulation

Clinical useUsed to produce stimulated muscle contraction and support neuromuscular re-education, including after surgery or immobilization