CurrentMass General Brigham Health PlanPolicy 096

IB-Stim percutaneous electrical nerve field stimulation

Medical policy governing coverage and medical necessity criteria for the IB-Stim percutaneous electrical nerve field stimulator system for Mass General Brigham Health Plan members, with specific MassHealth and Medicare variation notes.

Policy Summary

PayerMass General Brigham Health Plan

PolicyIB-Stim percutaneous electrical nerve field stimulation

Policy CodePolicy 096

Change TypeNo material changes

Effective DateAug 1, 2025

Next Review Date

Key ActionObtain MassHealth prior authorization using code 64999 for eligible MassHealth ACO members.

SourceLink

POLICY UPDATE CHANGES

No material clinical or coverage changes in this revision.

11-18age range

120 hrs/wktherapy duration

0720T, 64999codes listed

MassHealth ACOcoverage

Coverage and Medical Necessity Criteria

Covered Indications (Mass General Brigham ACO only)

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Age: Member is between the ages of 11 and 18ages 11-18

Diagnosis: Member has functional abdominal pain associated with irritable bowel syndrome or functional dyspepsia as defined below

IBS and functional dyspepsia definitions provided

Irritable bowel syndrome (pediatric criteria): Irritable bowel syndrome: Recurrent abdominal pain on average at least one day per week in the last three months, with symptom onset at least six months ago, associated with two or more of: change in stool frequency and/or change in stool form

From policy diagnostic criteria

Functional dyspepsia (diagnostic criteria): Functional dyspepsia: Evaluation including upper endoscopy shows no evidence of structural disease likely to explain symptoms, and at least one of: bothersome postprandial fullness; bothersome early satiation; bothersome epigastric pain; or bothersome epigastric fullness

From policy diagnostic criteria

Functional impact and prior therapies: Member has decreased functioning (e.g., school absence, avoidance of extracurricular activities, social avoidance) due to abdominal symptoms that persist despite at least three of the following categories: behavioral modification; educational interventions or psychotherapy (coping mechanisms such as relaxation, distraction, or guided imagery); dietary changes or trigger avoidance; pharmacologic interventionsat least 3 categories tried

Enumerated prior intervention categories

Skin condition: Member's skin is healthy, clean, and intact at the implantation site

Implantation site skin requirement

The following conditions are exclusions or contraindications to IB‑Stim percutaneous electrical nerve field stimulation: presence of a cardiac pacemaker; hemophilia; psoriasis vulgaris; infected skin at the intended implantation site; or a history of sensitivity to compound benzoin tincture. Providers should confirm the implantation site is healthy, clean, and intact before proceeding.

Coding and Service Parameters

Informational CPT/HCPCSCPT

0720T

Percutaneous electrical nerve field stimulation, cranial nerves, without implantation.

Unlisted procedure / Authorization codeCPT

64999

Unlisted procedure, nervous system

inv-06: Therapy duration — 120 hours per week for up to three consecutive weeks and no more than four consecutive weeks

Therapy duration120 hours per week for up to three consecutive weeks and no more than four consecutive weeks

Prior Authorization, Documentation, and Billing Actions

Prior Authorization

Prior Authorization Required

Authorization is required for MassHealth (use code 64999). Mass General Brigham follows MassHealth guidance for its MassHealth ACO members.

MassHealth authorization code: 64999
MassHealth not payable code: 0720T (MassHealth lists 0720T as Not Covered/Payable)

Documentation Required

MassHealth documentation linkage

MassHealth has specific documentation requirements for IB‑Stim. Mass General Brigham Health Plan uses MassHealth guidance for its MassHealth ACO members — ensure all MassHealth documentation elements are included in the prior authorization and medical record.

Follow MassHealth documentation rules when submitting authorizations for MassHealth ACO members
Retain documentation showing attempts of required prior interventions and functional impact

Documentation Required

Required prior interventions

Candidates must have persistent decreased functioning due to abdominal symptoms despite having tried at least three categories of prior interventions. Document the specific interventions tried and the ongoing functional impact (e.g., school absence, avoidance of activities, social avoidance).

Required prior interventions (at least three categories): Behavioral modification; Educational interventions or psychotherapy to teach coping mechanisms (relaxation, distraction, guided imagery); Dietary changes or trigger avoidance; Pharmacologic interventions
Document duration and response to each intervention and current functional impairment

Background and Device Description

IB‑Stim is a percutaneous electrical nerve field stimulator that delivers low‑frequency electrical pulses to branches of cranial and occipital nerves with the intent to modulate pain processing. The precise mechanism of action in humans has not been fully demonstrated. Evidence to date is limited but suggests potential benefit in some adolescents with disorders of gut–brain interaction; major guidelines have provided only conditional recommendations.

Definitions and Diagnostic Criteria

inv-12: IB-Stim / PENFS — device definition

Device typePercutaneous electrical nerve field stimulator (PENFS) that transmits low‑frequency electrical pulses to branches of cranial and occipital nerves

PurposeModulates pain processing in the brain and central nervous system

Alternate nameIB‑Stim

inv-13: Irritable bowel syndrome (pediatric criteria) — diagnostic criteria summary

IBS (pediatric) frequency and durationRecurrent abdominal pain on average at least one day per week in the last 3 months with symptom onset at least 6 months ago

IBS associated features (need ≥2)Associated with a change in stool frequency and/or a change in stool form (appearance), or related to defecation

Age range (coverage context)Policy applies to members aged 11–18 when criteria are met

inv-14: Functional dyspepsia — diagnostic criteria summary

Functional dyspepsia core requirementEvaluation including upper endoscopy shows no structural disease likely to explain symptoms

Key symptoms (any one qualifies)Bothersome postprandial fullness; bothersome early satiation; bothersome epigastric pain; or bothersome epigastric fullness

Coverage contextFunctional dyspepsia included as eligible diagnosis for IB‑Stim when other policy criteria are met

Policy Revision History

2025-08-01policy_effective_dateLatest

Policy effective date set to August 2025; IB-Stim coverage criteria and MassHealth/Mass General Brigham variations documented.

2025-05-08evidence_update_reference

Literature and evidence summary updated with recent references (Balakrishnan & Chiou 2024, Hayes EER 2022, and others) cited in the summary of evidence section.

2022-07-14evidence_review

Hayes Inc. published an Evolving Evidence Review on IB-Stim noting limited/no support from clinical studies, cited in the policy's evidence summary and informing investigational stance for commercial and Medicare Advantage plans.