CurrentUnitedHealthcarePolicy CS020.S

Cognitive Rehabilitation and Coma Stimulation

UnitedHealthcare policy governing outpatient cognitive rehabilitation services and coma stimulation programs, including applicability by state, coding references, and evidence-based coverage positions. Coma stimulation is considered unproven and not medically necessary for Disorders of Consciousness; cognitive rehabilitation may be medically necessary when InterQual LOC: Outpatient Rehabilitation & Chiropractic criteria are met.

Policy Summary

PayerUnitedHealthcare

PolicyCognitive Rehabilitation and Coma Stimulation

Policy CodePolicy CS020.S

Change TypeTitle revision; coverage rationale updated

Effective DateDec 1, 2025

Next Review Date

Key ActionProviders must document and demonstrate that outpatient cognitive rehabilitation meets the InterQual® LOC: Outpatient Rehabilitation & Chiropractic medical necessity criteria when requesting coverage or prior authorization.

POLICY UPDATE CHANGES

Title changed from 'Cognitive Rehabilitation' to 'Cognitive Rehabilitation and Coma Stimulation' and coverage rationale language updated to specify coma stimulation is not medically necessary for any Disorder of Consciousness (DOC).

Application section updated to exclude additional states and update state-specific policy links (Idaho, Nebraska, North Carolina, Pennsylvania and others).

Supporting information, Description of Services, Clinical Evidence, and References updated to reflect current information.

Outpatient onlyService Setting

1Not Covered: Coma Stimulation indications

Coverage Summary

UnitedHealthcare policy CS020.S governs outpatient Cognitive Rehabilitation (CR) services and Coma Stimulation programs. The policy stance is mixed: CR is considered proven and medically necessary under certain circumstances when all InterQual® LOC: Outpatient Rehabilitation & Chiropractic medical necessity criteria are met, while coma stimulation is not medically necessary for any Disorder of Consciousness (DOC). This policy is CURRENT. Effective date: December 1, 2025. Last review: March 1, 2026.

Policy facts

Policy numberCS020.S

PayerUnitedHealthcare

Effective date2025-12-01

Last review2026-03-01

Service settingOutpatient only

Coverage stanceMixed (CR: may be medically necessary per InterQual; Coma Stimulation: not medically necessary for any DOC)

Medical necessity referenceInterQual® LOC: Outpatient Rehabilitation & Chiropractic

Medical Necessity Criteria

Cognitive Rehabilitation - Medical Necessity

Covered when ALL of the following are met per InterQual® LOC: Outpatient Rehabilitation & Chiropractic:

ALL of the following

Service is outpatient Cognitive Rehabilitation (CR) per policy scope (policy applies to outpatient CR services only).
InterQual® level of care criteria for Outpatient Rehabilitation & Chiropractic are met for the requested CR services (refer to InterQual® Outpatient Rehabilitation & Chiropractic for specific clinical criteria).
Click here to view the InterQual® criteria.

Outpatient service restriction: This policy applies only to outpatient Cognitive Rehabilitation services; inpatient, long-term acute care, skilled nursing facility, or residential settings are outside the scope of this outpatient policy.

Coma Stimulation / Coma Arousal

Coding

Cognitive Rehabilitation CPT codes (reference)CPTCovered

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; direct (one-on-one) patient contact; initial 15 minutes.
97130	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; direct (one-on-one) patient contact; each additional 15 minutes (List separately in addition to code for primary procedure).

Coma Stimulation HCPCS code (reference)HCPCSNot Covered

S9056

Coma stimulation per diem.

Provider Actions & Billing Impact

Prior Authorization

Use InterQual criteria for medical necessity determination

Providers must document and demonstrate that outpatient cognitive rehabilitation meets the InterQual® LOC: Outpatient Rehabilitation & Chiropractic medical necessity criteria when requesting coverage or prior authorization.

97129
97130

Denial Risk

Coma stimulation not medically necessary for DOC

Claims for coma stimulation (for example, S9056) for any Disorder of Consciousness (DOC) are considered not medically necessary due to insufficient evidence of efficacy and are subject to denial.

Background, Evidence & Definitions

Cognitive Rehabilitation (CR) is described as a multidisciplinary outpatient program using restorative and compensatory approaches to improve cognitive functions such as memory, attention, language, reasoning, planning, and problem-solving; restorative approaches strengthen skills while compensatory approaches teach strategies to bypass impairments. Coma Stimulation involves multimodal sensory stimulation intended to promote arousal and speed recovery from coma but lacks established protocols or definitive patient selection criteria.

Clinical evidence is mixed: CR is governed for medical necessity by InterQual® LOC: Outpatient Rehabilitation & Chiropractic and evidence includes randomized trials and systematic reviews showing benefits in some populations but with limitations (small samples, heterogeneous methods). Multiple systematic reviews and trials find insufficient high-quality, consistent evidence to support coma stimulation for Disorders of Consciousness; sensory stimulation studies are heterogeneous and do not establish standardized protocols or definitive efficacy.

Supporting evidence summary: InterQual criteria govern CR medical necessity; systematic reviews and randomized controlled trials provide mixed evidence for CR across disorders, and multiple reviews/meta-analyses show insufficient high-quality evidence to support coma stimulation for Disorders of Consciousness.

Definitions

Evidence summary

Revision History

2025-12-01title_revision

Title changed from 'Cognitive Rehabilitation' to 'Cognitive Rehabilitation and Coma Stimulation'; coverage rationale updated to specify coma stimulation is unproven and not medically necessary for any Disorder of Consciousness (DOC).

2025-12-01definitions_revision

Definition of 'Disorder of Consciousness (DOC)' was added; definitions for coma/persistent vegetative state and minimally conscious state were removed; supporting sections (Description of Services, Clinical Evidence, References) updated.

2026-01-01application_update

Application section updated to indicate the policy does not apply to additional states (Nebraska and North Carolina); refer to state-specific policy versions/links for those states.