DraftUnitedHealthcarePolicy CS020ID.C

Cognitive Rehabilitation and Coma Stimulation (for Idaho Only)

This policy governs outpatient cognitive rehabilitation services and the use of coma stimulation for members in Idaho, including Idaho Medicaid Plus plans; it defines coverage rationale, references state-specific criteria, and lists applicable codes and supporting clinical evidence.

Policy Summary

PayerUnitedHealthcare

PolicyCognitive Rehabilitation and Coma Stimulation (for Idaho Only)

Policy CodePolicy CS020ID.C

Change TypeTitle and definition revisionsmaterial change

Effective DateFeb 1, 2026

Next Review Date

Key ActionCheck member benefits and follow Idaho-specific medical necessity criteria before requesting authorization; coma stimulation for any Disorder of Consciousness is considered not medically necessary.

SourceLink

POLICY UPDATE CHANGES

Replaced language that labeled coma stimulation as unproven and not medically necessary for any indication including comatose, vegetative, or minimally conscious states with a statement that coma stimulation is unproven and not medically necessary for any Disorder of Consciousness (DOC).

Added definition of 'Disorder of Consciousness (DOC)'.

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

Idaho-onlygeographic applicability

Outpatient onlyservice setting

Not medically necessary

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coverage stance for coma stimulation

CPT 97129, 97130; S9056example procedure codes listed

Coverage Criteria and Rationale

Coverage Summary

Covered when ALL of the following apply:

Outpatient Cognitive Rehabilitation: Applies to outpatient cognitive rehabilitation services only; medical necessity clinical coverage criteria are those in the Idaho Medicaid Provider Handbook, Therapy Services, Chapter 5.13: Cognitive Rehabilitation (OT/SLP).

For number and frequency of therapy visits, refer to InterQual® LOC: Outpatient Rehabilitation & Chiropractic as applicable.

Coma Stimulation (also known as coma arousal, coma responsiveness, multisensory stimulation, and coma care therapy/programs) is unproven and not medically necessary due to insufficient evidence of efficacy for any Disorder of Consciousness (DOC).

No established standardized protocols or definitive patient selection criteria; see policy exclusions for noncoverage statement.

Not Medically Necessary — Coma Stimulation for DOC

Not medically necessary when the following condition is present:

Coma stimulation for Disorder of Consciousness: Coma Stimulation (also known as coma arousal, coma responsiveness, multisensory stimulation, and coma care therapy/programs) is unproven and not medically necessary for any Disorder of Consciousness (DOC).

This statement replaces prior broader wording referencing comatose, vegetative, or minimally conscious states.

Coma Stimulation (also known as coma arousal, coma responsiveness, multisensory stimulation, and coma care therapy/programs) is unproven and not medically necessary for treatment of Disorders of Consciousness (DOC). This noncoverage applies to outpatient settings addressed by this policy and is based on insufficient evidence of efficacy for any DOC.

No additional coverage criteria are specified in this policy window beyond the statement that coma stimulation is unproven and not medically necessary for any Disorder of Consciousness (DOC). The revised wording replaces prior language that referenced specific states such as comatose, vegetative, or minimally conscious conditions.

The rationale for noncoverage is that controlled trials and systematic reviews are limited and provide inconsistent evidence regarding clinical benefit. Available studies, including recent reviews, show heterogeneous interventions and outcomes and do not demonstrate a consistent, reproducible, and positive impact on health outcomes; therefore coma stimulation programs are considered unproven and not medically necessary for disorders of consciousness.

In alternate wording for clarity: Coma stimulation is unproven and not medically necessary for any Disorder of Consciousness (DOC). This concise statement reflects the policy’s intent and replaces the prior broader phrasing referencing specific consciousness states.

Relevant Procedure and Billing Codes

Covered CPT Codes (referenced)CPT

97129

Therapeutic interventions that focus on cognitive function (e.g., attention, memory, reasoning, executive function, problem solving, and/or pragmatic functioning) and compensatory strategies to manage the performance of an activity (e.g., managing time or schedules, initiating, organizing, and sequencing tasks), direct (one-on-one) patient contact; initial 15 minutes.

97130

HCPCS Codes (referenced)HCPCS

S9056

Coma stimulation per diem

Provider Requirements, Prior Auth, and Billing Guidance

Prior Authorization

Prior Authorization and Benefit Verification

Prior authorization may be required for outpatient cognitive rehabilitation services and related billing. Verify member benefits, state and contract requirements, and any applicable third-party utilization management tools (e.g., InterQual) before rendering services.

Verify member benefits and prior authorization requirements per Idaho contract
UnitedHealthcare may use InterQual criteria for number/frequency of therapy visits

Denial Risk

Coma Stimulation — Denial Risk

Coma Stimulation (also known as coma arousal, coma responsiveness, multisensory stimulation, and coma care therapy/programs) is considered unproven and not medically necessary for any Disorder of Consciousness (DOC). Requests for coma stimulation are likely to be denied and are not covered under this policy.

HCPCS S9056 (Coma stimulation per diem) is considered not medically necessary for DOC

Key Terms and Definitions

inv-18: Cognitive Rehabilitation (CR) — definition of multidisciplinary treatment program

TermCognitive Rehabilitation (CR)

DefinitionA multidisciplinary treatment program designed to improve cognitive function and retrain an individual's ability to think, use judgment, and make decisions; focuses on deficits in memory, attention, perception, visual processing, language, reasoning, learning, planning, judgment, and problem-solving.

GoalsReinforce or reestablish previously learned behaviors or establish compensatory mechanisms to maximize functional independence.

ApproachIncludes restorative and compensatory tasks performed by a multidisciplinary team to minimize interference from cognitive limitations.

inv-19: Coma Stimulation — definition describing multimodal sensory stimulation

Term

Clinical Background

Cognitive impairment can affect memory, attention, executive function, language, and visuoperceptual abilities. Cognitive Rehabilitation (CR) is a multidisciplinary program using restorative and compensatory approaches to improve cognitive processing and functional independence. Coma Stimulation refers to multimodal sensory stimulation intended to improve arousal in individuals with disorders of consciousness, but it lacks standardized protocols, definitive patient selection criteria, and sufficient evidence of consistent benefit, which informs the policy’s noncoverage stance.

Policy Revision History

2026-02-01Title and coverage wording updateLatest

Policy title changed from 'Cognitive Rehabilitation (for Idaho Only)' and coverage rationale was revised to state that coma stimulation is unproven and not medically necessary for any 'Disorder of Consciousness (DOC)' instead of prior broader wording referencing comatose, vegetative, or minimally conscious states.

2026-02-01Definition added/removed

Added a definition for 'Disorder of Consciousness (DOC)' and removed prior definitions for 'Coma/Persistent Vegetative State' and 'Minimally Conscious State'.

2026-02-01

Policy Summary

PayerUnitedHealthcare

PolicyCognitive Rehabilitation and Coma Stimulation (for Idaho Only)

Policy CodePolicy CS020ID.C

Change TypeTitle and definition revisionsmaterial change

Effective DateFeb 1, 2026

Next Review Date

SourceLink

On This Page

Prior authorization requests for coma stimulation will be subject to noncoverage

Documentation Required

State Criteria and Coding Reference (Idaho)

Providers must follow Idaho-specific clinical criteria and coding guidance for Cognitive Rehabilitation as contained in the Idaho Medicaid Provider Handbook, Therapy Services, Chapter 5.13.

Follow Idaho Medicaid clinical criteria for medical necessity determinations
Use CPT codes 97129 and 97130 for outpatient cognitive rehabilitation services per coding guidance

Step Therapy

No step therapy requirements are specified in this policy for cognitive rehabilitation or coma stimulation.

There are no step therapy steps applicable to Cognitive Rehabilitation or Coma Stimulation in this policy

Note

Plan and Contract Checks Required

Always reference federal, state, and contractual benefit requirements when determining coverage; this policy is informational and does not override plan or contractual terms.

Confirm plan/contract terms prior to service authorization
This policy may be supplemented by state Medicaid handbook or other contractual provisions

DefinitionThe use of multimodal sensory stimulation in an attempt to speed up the process of recovery from coma or improve arousal level.

SynonymsAlso referred to as coma arousal, coma responsiveness, multisensory stimulation, and coma care therapy/programs.

Evidence noteControlled trials are limited and literature does not demonstrate reproducible positive impact on health outcomes for disorders of consciousness.

inv-20: Disorder of Consciousness (DOC) — DOC definition (coma, vegetative state, minimally conscious state) from policy

TermDisorder of Consciousness (DOC)

DefinitionA state of prolonged altered consciousness, categorized into coma, vegetative state, or minimally conscious state based on neurobehavioral function.

ContextDOC terminology was added to the policy to replace prior separate definitions for coma/persistent vegetative state and minimally conscious state.

inv-21: Disorder of Consciousness (DOC) — added definition referenced elsewhere in the policy

Policy changeDefinition of 'Disorder of Consciousness (DOC)' was added to the policy; previous separate definitions for coma/persistent vegetative state and minimally conscious state were removed.

Replacement wordingPolicy language updated to state coma stimulation is unproven and not medically necessary for any Disorder of Consciousness (DOC).

Version noteChange recorded in Policy History/Revision Information dated 02/01/2026.

inv-22: Cognitive rehabilitation — note that therapy is not subject to FDA regulation

TopicCognitive rehabilitation and FDA regulation

StatementCognitive rehabilitation is therapy and is not subject to FDA regulation.

PurposeInformational: FDA approval alone is not a basis for coverage decisions.

SourceU.S. Food and Drug Administration section of policy (informational).

Supporting information updated and previous version archived

Updated Description of Services, Clinical Evidence, and References sections and archived previous policy version CS020ID.B.