CurrentUnitedHealthcarePolicy CS195ID.B

Tmj Disorders Id Cs

UnitedHealthcare medical policy (Idaho only) defining medically necessary non-surgical and surgical treatments for temporomandibular joint disorders, unproven/not medically necessary services, applicable procedure and durable medical equipment codes, documentation requirements, and evidence summaries. This is Part 1 of 2 and applies to Idaho including Idaho Medicaid Plus plans.

Policy Summary

PayerUnitedHealthcare

PolicyTmj Disorders Id Cs

Policy CodePolicy CS195ID.B

Change TypeRevisions and additions (examples, documentation language, editorial updates)

Effective DateMay 1, 2026

Next Review Date

Key ActionEnsure patient medical records fully support medical necessity including relevant history, physical exam, and diagnostic test results; keep documentation legible and available on request.

SourceLink

POLICY UPDATE CHANGES

Replaced 'passive rehabilitation therapy devices (e.g., TheraBite... and Jaw Dynasplint...) and low-load prolonged-duration stretch devices (e.g., Jaw Dynasplint® System)' with 'jaw mobility mechanical stretching devices (e.g., TheraBite..., Jaw Dynasplint® System)' in the list of unproven and not medically necessary services.

Revised list of examples of epigenetic appliances; added 'Advanced Lightwire Functional (ALF) appliances'.

Added language clarifying medical records documentation used for reviews and that documentation may be required to assess medical necessity but does not guarantee coverage.

Updated Description of Services, Clinical Evidence, and References sections to reflect most current information.

5Non-surgical services listed as medically necessary

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Coverage Summary

This UnitedHealthcare Idaho policy (Part 1 of 2) addresses treatment of temporomandibular joint disorders (TMJ/TMD) and defines medically necessary non‑surgical and surgical services, lists unproven/not medically necessary interventions, references applicable procedure and device codes, and describes required documentation and evidence summaries. The policy applies to Idaho, including Idaho Medicaid Plus plans. The clinical approach emphasizes initially using the most conservative, reversible treatments possible (e.g., NSAIDs, soft diet, jaw rest, moist heat, steroids, physical therapy, and occlusal splints); when conservative care fails, escalation may include injection therapies or surgery. Surgical medical necessity and coverage determinations for TMJ procedures are referenced to InterQual criteria.

Key counts from policy stats

Medically necessary non-surgical services5

Surgical procedures referenced to InterQual4

Examples of services listed as unproven/not medically necessary5

Mechanical stretching device examples cited2

New epigenetic appliance example added (ALF)1

Medical-Necessity Criteria

Not Medically Necessary / Unproven Services

Certain therapies are designated unproven and not medically necessary because high‑quality evidence of efficacy is lacking. Specifically, jaw mobility mechanical stretching devices (examples: TheraBite, Jaw Dynasplint) and other passive stretching devices have limited and inconsistent data with compliance issues in trials, and biofeedback and craniosacral manipulation lack sufficient quality evidence. Likewise, epigenetic intraoral appliances (examples: Homeoblock, DNA Appliance, and Advanced Lightwire Functional (ALF) appliances) have no quality evidence supporting benefit for TMJ disorders and are considered unproven.

Coding

Referenced CPT procedure codes (for TMJ procedures and injections)CPT

20552	Injection(s); single or multiple trigger point(s), 1 or 2 muscle(s)
20553	Injection(s); single or multiple trigger point(s), 3 or more muscles
20605	Arthrocentesis, aspiration and/or injection, intermediate joint, or bursa; without ultrasound guidance
20606	Arthrocentesis, aspiration and/or injection, intermediate joint, or bursa; with ultrasound guidance, with permanent recording and reporting
21010	Arthrotomy, temporomandibular joint
21050	Condylectomy, temporomandibular joint (separate procedure)
21060	Meniscectomy, partial or complete, temporomandibular joint (separate procedure)
21070	Coronoidectomy (separate procedure)
21085	Impression and custom preparation; oral surgical splint
21089	Unlisted maxillofacial prosthetic procedure

1–10 of 22

1/3

Referenced HCPCS / DME / supply codes (devices and biofeedback equipment)HCPCS

E0746	Electromyography (EMG), biofeedback device
E1399	Durable medical equipment, miscellaneous
E1700	Jaw motion rehabilitation system
E1701	Replacement cushions for jaw motion rehabilitation system, package of 6
E1702	Replacement measuring scales for jaw motion rehabilitation system, package of 200

FDA product codes referenced (informational only)mixed

LZD / MPI	FDA product codes for temporomandibular joint prostheses (Class III devices, PMA) - informational
BXB	FDA product code for Continuous Passive Motion (CPM) machines (Class II devices) - informational

Provider Actions & Authorization

Prior Authorization

InterQual required for surgical coverage / Verify contractual requirements

Surgical procedures described in this policy require meeting InterQual medical necessity criteria. In addition, federal, state, or specific contractual requirements may mandate preauthorization or other verification steps before coverage is determined.

Affected surgical services include: arthroscopy, discectomy, reconstruction, and arthroplasty of the temporomandibular joint.
Verify whether the member’s plan, state law, or federal program requires preauthorization prior to scheduling surgery.
If preauthorization is required, submit documentation sufficient to demonstrate that InterQual criteria are met for the requested surgical procedure.
Contact the payer or use the applicable portal/process to confirm contractual requirements and obtain any required prior authorization before performing the service.

Documentation Required

Documentation requirements for medical necessity

Background, Evidence Summary & Definitions

Temporomandibular disorders encompass conditions of the TMJ and surrounding musculature causing pain, limited range of motion, and joint noises. Experts recommend beginning treatment with conservative, reversible therapies (e.g., NSAIDs, jaw rest, physical therapy, and occlusal splints); if these fail, escalation to injections (arthrocentesis, intra‑articular corticosteroids, trigger point injections) or surgical interventions may be considered. Surgical procedures (arthroscopy, discectomy, reconstruction, arthroplasty) require meeting InterQual clinical criteria for medical necessity. The policy cross‑references related Medical Benefit Drug Policies for intra‑articular sodium hyaluronate and botulinum toxins A/B and lists applicable CPT and HCPCS codes for TMJ procedures, injections, and devices; it also specifies medical record documentation requirements used in benefit reviews.

Evidence topic	Summary
Arthrocentesis RCTs/systematic reviews	Multiple RCTs and systematic reviews show arthrocentesis can reduce pain and improve mouth opening; evidence is heterogeneous with some studies showing faster pain relief or superior outcomes when combined with injections (HA/PRP).
Corticosteroid injections evidence	Systematic reviews and RCTs indicate corticosteroid injections alone or with arthrocentesis can improve pain; arthrocentesis plus corticosteroid may improve maximum mouth opening; overall evidence quality variable/limited.
Trigger point injections and needling	Network meta-analyses suggest needling therapies (dry/wet, local anesthetic, PRP, botulinum toxin A) yield short- and intermediate-term improvements, but overall evidence quality is low to very low.
Physical therapy and splints	RCTs and systematic reviews show benefit from physical therapy and occlusal splint therapy; combined multimodal therapy (e.g., PT plus splint) may produce greater improvements; evidence quality ranges low to moderate.
Unproven therapies	Biofeedback, craniosacral therapy, jaw mobility mechanical stretching devices (e.g., TheraBite, Jaw Dynasplint), and epigenetic appliances lack sufficient high-quality evidence to establish efficacy.
Zatarain et al. (2018) Jaw Dynasplint trial	Feasibility RCT in head and neck cancer patients found low compliance with Jaw Dynasplint and decreased adherence versus conventional stretching, making it unlikely efficacious as a preventative regimen.
Kraaijenga et al. (2014) TheraBite RCT	RCT comparing TheraBite to standard physical therapy for myogenic TMD found both equally effective by 3 months; TheraBite produced greater early functional improvement but no long-term differences.
Epigenetic appliances literature	No quality evidence identified to support efficacy of epigenetic appliances (examples include Homeoblock, DNA Appliance, ALF) for TMJ disorders.

Definitions

Key definitions used in this policy:

Definitions text block: Arthrocentesis: Lavage/flush of the TMJ joint often with aspiration and/or injection; CPT 20605/20606 referenced. -- Occlusal splint: Stabilization or mandibular repositioning splint/device intended to reduce clenching/bruxism and reposition the jaw. -- PMA: Premarket Approval (FDA process for Class III devices). -- CPM: Continuous Passive Motion device.

Revision History

2026-05-01revisedLatest

Revised list of examples of epigenetic appliances; added 'Advanced Lightwire Functional (ALF) appliances' to examples considered unproven and not medically necessary.