CurrentAmeriHealth CaritasPolicy CCP.1359

Video head impulse testing

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This policy governs medical necessity and coverage of video head impulse testing (vHIT) for evaluation of semicircular canal and vestibular function, affecting AmeriHealth Caritas members and providers requesting coverage for vestibular diagnostic testing.

Policy Summary

PayerAmeriHealth Caritas

PolicyVideo head impulse testing

Policy CodePolicy CCP.1359

Change TypeTechnical update — no material coverage changes

Effective DateMar 1, 2024

Last ReviewApr 1, 2026

Next Review DateAug 1, 2027

Key ActionDocument member symptoms, an inconclusive standard head impulse test, and that vHIT results will affect treatment decisions when requesting coverage.

SourceLink

POLICY UPDATE CHANGES

No material clinical or coverage changes in this revision.

15-30%prevalence of dizziness

84% / 85%stroke triage accuracy

47%discordant vHIT vs caloric

4/2026references updated

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CurrentAmeriHealth CaritasPolicy CCP.1359

Video head impulse testing

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Sign up for AmeriHealth Caritas Policy CCP.1359 alerts

Get alerted when Policy CCP.1359 changes without checking for updates manually.

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Policy Summary

PayerAmeriHealth Caritas

PolicyVideo head impulse testing

Policy CodePolicy CCP.1359

Change TypeTechnical update — no material coverage changes

Effective DateMar 1, 2024

Last ReviewApr 1, 2026

Next Review DateAug 1, 2027

Key ActionDocument member symptoms, an inconclusive standard head impulse test, and that vHIT results will affect treatment decisions when requesting coverage.

SourceLink

POLICY UPDATE CHANGES

No material clinical or coverage changes in this revision.

15-30%prevalence of dizziness

84% / 85%stroke triage accuracy

47%discordant vHIT vs caloric

4/2026references updated

Coverage Criteria for vHIT

Medical necessity criteria

Video head impulse testing may be medically necessary when ALL of the following criteria are met:

vHIT medical necessity criteria: The member has symptoms of a vestibular disorder (e.g., dizziness, vertigo, imbalance, falls without other medical explanation).

From policy coverage section

vHIT medical necessity criteria: History and clinical evaluation, including the standard head impulse test, is inconclusive.

From policy coverage section

vHIT medical necessity criteria: The test results will aid in determining the appropriate medical or surgical treatment for disorders of auditory, balance, and other neural systems.

From policy coverage section

Clinical utility and interpretation

Clinical evidence-based considerations for vHIT utility and interpretation

vHIT utility notes: vHIT provides objective assessment of high-frequency semicircular canal function and contributes independent discriminatory value in differentiating vestibular conditions, particularly when used alongside caloric testing and when saccade analysis is performed; vHIT gain alone has limited utility in some differentials (e.g., Meniere's disease vs vestibular migraine).

Supported by meta-analyses and systematic reviews

vHIT vs caloric testing: vHIT and caloric testing are complementary rather than interchangeable: caloric testing evaluates low-frequency lateral canal function and typically shows higher abnormal rates in some populations, while vHIT assesses high-frequency function across all six canals; discordant results (normal vHIT with abnormal caloric) are well described.

Data from multiple meta-analyses and systematic reviews

Evidence quality and applications: The evidence base is low-to-moderate quality overall; vHIT is useful for triage in acute vestibular syndrome and for adding discriminatory value in differential diagnoses when combined with other tests, but gain reduction alone may not distinguish some conditions—saccade pattern analysis often provides additional diagnostic information.

Summarizes prospective, retrospective, and meta-analytic findings

vHIT is not medically necessary as an initial, sole screening test for dizziness. Use of video head impulse testing alone as the first and only diagnostic evaluation for a patient presenting with dizziness is explicitly listed as a limitation and may be denied.

vHIT should not be considered a substitute for caloric testing. Caloric testing evaluates low-frequency lateral canal function while vHIT assesses high-frequency function across all six semicircular canal planes; the two tests provide complementary information and may yield divergent results because they measure different physiologic frequency domains rather than representing measurement error.

Any use of vHIT solely as the initial screening test for dizziness is considered not medically necessary. vHIT should not be used in isolation as the first-line, single screening modality for dizziness; clinical evaluation and other diagnostic approaches are required to establish the need for instrumented vestibular testing.

Coding and Billing for vHIT

Related/Commonly submitted codes for vHIT or vestibular testingCPT

92540	Basic vestibular evaluation, includes spontaneous nystagmus test with eccentric gaze fixation nystagmus, with recording, positional nystagmus test, minimum of 4 positions, with recording, optokinetic nystagmus test, bidirectional foveal and peripheral stimulation, with recording, and oscillating tracking test, with recording (report when all four component tests are performed on the same day; do not report in conjunction with 92541, 92542, 92544, or 92545)
92541	Spontaneous nystagmus test, including gaze and fixation nystagmus, with recording.
92542	Positional nystagmus test, minimum of 4 positions, with recording.
92544	Optokinetic nystagmus test, bidirectional, foveal or peripheral stimulation, with recording.
92545	Oscillating tracking test, with recording.
92547	Use of vertical electrodes (add-on code; list separately in addition to code for primary procedure for each vestibular test performed, 92537-92546).
92700	Unlisted otorhinolaryngological service or procedure (for use pending assignment of dedicated video head impulse testing Category I CPT codes approved by the AMA CPT Editorial Panel, October 2025; MAC-priced)

Provider Actions, Documentation & Billing Guidance

Prior Authorization

Prior authorization: attest to clinical criteria for vHIT medical necessity

Video head impulse testing (vHIT) is covered only when ALL of the following are met: the member has symptoms of a vestibular disorder (for example, dizziness, vertigo, imbalance, or unexplained falls); history and clinical evaluation including the standard (noninstrumented) head impulse test are inconclusive; and the vHIT results will aid in determining appropriate medical or surgical treatment for auditory, balance, or related neurologic disorders. Prior authorization may require attestation that these clinical criteria are satisfied.

Member symptoms consistent with a vestibular disorder are required (dizziness, vertigo, imbalance, falls without other explanation).
Standard head impulse test and clinical evaluation must be inconclusive before vHIT is considered.
Documentation must show that vHIT results will influence medical or surgical treatment decisions.

Billing Rule

Billing codes commonly submitted for vHIT-related vestibular testing

When billing for vestibular testing related to vHIT, use the most appropriate existing CPT codes commonly submitted for vestibular services; examples include 92540, 92541, 92542, 92544, 92545, 92547, and, when necessary pending vHIT-specific Category I CPT codes, unlisted otorhinolaryngological code 92700.

92540, 92541, 92542, 92544, 92545, 92547
92700 (unlisted otorhinolaryngological service/procedure) — used pending assignment of dedicated vHIT Category I CPT codes

Note

Consider alternative or adjunct vestibular tests prior to or with vHIT

Consider alternative or adjunct vestibular diagnostic options before or alongside vHIT depending on clinical context; the policy lists multiple covered vestibular and standard diagnostic tests as alternatives.

Computerized dynamic posturography
Electronystagmography or videonystagmography
Caloric testing
Rotation testing
Qualitative vestibular assessment
Scleral search coil method
Specialty referral
Standard diagnostic testing (audiometry, visual acuity exam, radiography, blood work)

Note

vHIT complements caloric testing; expect discordant abnormality rates

vHIT is complementary to caloric testing rather than a substitute; caloric testing evaluates low-frequency lateral canal function while vHIT assesses high-frequency function across all six canal planes, and meta-analyses show higher abnormal rates on caloric testing in many cohorts.

Caloric testing abnormal rates reported ~55% vs vHIT ~21% in chronic dizziness (Vallim, 2021).
Other reviews report 64% abnormal on caloric testing vs 28% on vHIT, with ~47% normal vHIT alongside abnormal caloric testing (Tamanini, 2023).
vHIT and caloric test different physiologic frequency domains; use together when clinical differentiation requires both low- and high-frequency assessment.

Documentation Required

Required clinical documentation to support medical necessity

Document clinical findings, symptoms, and prior evaluation clearly to support medical necessity: include member vestibular symptoms, inconclusive history/clinical evaluation (including standard head impulse test), and how vHIT results will influence treatment decisions.

Record presenting symptoms (dizziness, vertigo, imbalance, unexplained falls).
Document that history and clinical exam including the standard head impulse test were inconclusive.
State explicitly how vHIT results are expected to guide medical or surgical management.

Documentation Required

Documentation and coding: record tests performed and use appropriate CPT codes

Specify in the medical record which vestibular tests were performed and bill using the most appropriate existing CPT codes (92540–92547) or 92700 when a vHIT-specific Category I code is not yet available.

Document the test(s) performed (for example, vHIT plus any adjunct tests).
Select and report the most appropriate CPT code(s) for the procedures performed; consult coding manuals as needed.

Denial Risk

Denial risk: vHIT not authorized as sole initial screening for dizziness

vHIT used as the initial, sole screening test for dizziness is not medically necessary and may be denied; do not order vHIT as the only initial diagnostic screening for dizziness.

If vHIT is the sole initial test for dizziness it is considered not medically necessary.
Ensure other evaluation and clinical assessment precede vHIT when used for initial screening.

Billing Rule

Coding/billing risk: no dedicated Category I CPT code for vHIT; use related codes or 92700

There is no dedicated Category I CPT code yet for vHIT; common billing approaches include using existing vestibular CPT codes (92540–92547) or billing an unlisted otorhinolaryngological code 92700, which carries potential reimbursement and coding risk pending AMA CPT assignment.

Commonly used codes: 92540, 92541, 92542, 92544, 92545, 92547.
92700 (unlisted otorhinolaryngological procedure) may be used pending assignment of a dedicated vHIT code—this may be MAC-priced and subject to review.

Definitions and Test Descriptions

Standard head impulse test — bedside description and corrective saccade concept

Test typeStandard (bedside) head impulse test (head thrust test) — noninstrumented clinical maneuver assessing horizontal semicircular canal function by abrupt, unpredictable head rotations while the patient fixates on a target.

Observed signCorrective (catch‑up) saccade at the end of the head impulse indicates ipsilateral semicircular canal dysfunction — the eyes move with the head then a saccade returns fixation to the target.

Scope and limitationsSafe, noninvasive, uses physiological head movements of everyday life but lacks objective documentation compared with instrumented tests.

Video head impulse testing (vHIT) — instrumented eye‑tracking test description, gain and saccade measures

Test descriptionVideo head impulse testing (vHIT) is an instrumented, eye‑tracking version of the head impulse test that records eye and head velocity during abrupt head impulses across all six semicircular canals.

Primary measurementsQuantitative VOR gain (eye velocity / head velocity) and detection/characterization of corrective saccades (covert and overt) captured by high‑speed eye tracking.

Clinical advantageProvides objective, ear‑ and canal‑specific data and documents covert saccades that may be missed on bedside exam, contributing independent discriminatory value in some differentials when combined with other tests.

vHIT vs caloric testing — frequency domains and complementary nature

Frequency domainsCaloric testing evaluates low‑frequency lateral canal function; vHIT assesses high‑frequency function across all six canal planes.

Complementary relationshipAcross multiple meta‑analyses, vHIT and caloric testing are complementary rather than interchangeable; discordant results commonly occur (e.g., normal vHIT with abnormal caloric).

Implication for testingBecause each test measures different physiologic frequency sensitivity, vHIT should not be considered a substitute for caloric testing when low‑frequency function assessment is required.

vHIT metrics — gain and saccade analysis as key metrics

Gain metricvHIT gain quantifies vestibulo‑ocular reflex amplitude (eye velocity / head velocity); gain alone may have limited utility in some differentials (e.g., Meniere's vs vestibular migraine).

Saccade analysisCharacterization of corrective saccades (overt and covert) provides additional discriminatory value and is often more informative than gain reduction alone in certain differentials.

Combined interpretationInterpreting both gain and saccade patterns, and considering vHIT alongside caloric testing, yields greater diagnostic accuracy than relying on any single metric.

Video head impulse testing

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Coverage Criteria for vHIT

Coding and Billing for vHIT

Provider Actions, Documentation & Billing Guidance

Background and Epidemiology

Definitions and Test Descriptions