Currentblue cross blue shield - south dakotaPolicy N/A

Four-Dimensional (4-D) and Five-Dimensional (5-D) Fetal Ultrasound(s)

Governs use of 4-D and 5-D fetal ultrasound imaging in maternity care; does not apply to non-pregnancy ultrasound and refers 3-D ultrasound review to Wellmark/eviCore.

Policy Summary

Payerblue cross blue shield - south dakota

PolicyFour-Dimensional (4-D) and Five-Dimensional (5-D) Fetal Ultrasound(s)

Policy CodePolicy N/A

Change TypePolicy renewal (no material changes)

Effective DateApr 1, 1999

Next Review DateN/A

Key ActionDocument pregnancy status and the specific suspected fetal abnormality when ordering 4-D or 5-D ultrasound and justify incremental value over 2-D.

SourceLink

POLICY UPDATE CHANGES

No material clinical or coverage changes in this revision.

investigationalcoverage stance

2 obs + 4 diagstudies summarized

95.18%diagnostic accuracy (Wang et al)

0clinical utility studies

non-pregnancy excludedscope exclusion

Related Billing Codes

CPT-76499-UNLISTED-DIAGNOSTIC-RADIOGRAPHIC-PROCEDURE

CPT 76499: Unlisted Diagnostic Radiographic Procedure

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Coverage Determination and Evidence Summary

Investigational — All Indications

Coverage determination

Main policy statement: The use of four-dimensional (4-D) and/or five-dimensional (5-D) fetal ultrasound(s) is considered investigational for all indications because the evidence is insufficient to determine the technology results in an improvement in the net health outcomes.

No clinical utility studies identified; most studies evaluated diagnostic accuracy for 4-D only; 5-D not evaluated in included studies.

Clinical validity and limitations

Evidence summary and applicability for diagnostic use

Clinical validity for 4-D ultrasound: Class I studies exist for 4-D ultrasound for fetal cardiac (2 studies) and noncardiac (4 studies) abnormalities but findings are inconclusive due to heterogeneity in evaluated abnormalities and inadequate reporting of variance/precision.inconclusive

None of these studies evaluated 5-D ultrasound; most were not conducted in the U.S.; study designs and populations were heterogeneous.

Clinical utility (health outcomes)

Clinical utility

Clinical utility evidence: No randomized or nonrandomized controlled studies demonstrate that use of 4-D or 5-D ultrasound changes health outcomes; direct evidence of clinical utility is lacking and the chain of evidence is insufficient to infer benefit for diagnosis of fetal noncardiac abnormalities.no direct evidence

Hence, clinical utility is unproven.

Coverage considerations based on evidence

Evidence summary and application to coverage decisions

Evidence base: Clinical validity: a small number of diagnostic accuracy (Class I) studies report mixed results and are heterogeneous in abnormalities evaluated and reporting; Clinical utility: no controlled studies demonstrate improved health outcomes when management is guided by 4-D or 5-D ultrasound.

Representative references include Öcal et al. 2015 and Wang et al. 2019; none of the identified studies evaluated 5-D ultrasound and overall evidence does not support coverage.

This evidence review addresses the use of four-dimensional (4-D) and five-dimensional (5-D) fetal ultrasound in maternity care and does not apply to ultrasound performed for non-pregnancy related conditions. For review of 3-D fetal ultrasound, the policy refers to Wellmark's Authorization Table/eviCore. The clinical context for fetal ultrasound includes assessment of pregnancy, confirmation of gestational age, fetal size and position, heartbeat, congenital malformations, placental abnormalities, and amniotic fluid volume.

No clinical validity studies of 5-D ultrasound were identified in the evidence reviews for either fetal cardiac or noncardiac abnormalities. All Class I studies found evaluated 4-D ultrasound only, and the reviews explicitly state that 5-D is not supported by the available evidence.

The policy and supporting professional guidance discourage use of fetal ultrasound solely for non-medical keepsake/entertainment purposes. ACOG and AIUM statements note that prenatal ultrasounds performed for nonmedical keepsake videos or photographs are not medically indicated, and AIUM recommends that only images obtained as part of a medically indicated examination (or used in supervised educational settings) are consistent with professional ethical principles.

Within the cited document chunks there are no additional explicit coverage criteria, exclusions, or formal medical necessity statements beyond those already summarized; the coding section directs use of appropriate CPT/HCPCS and diagnosis codes but does not contain new coverage rules in the referenced chunk.

Overall, the available evidence does not demonstrate that 4-D or 5-D fetal ultrasound improves net health outcomes. The policy concludes these modalities are investigational for all indications because no clinical utility studies were identified and diagnostic accuracy studies (which evaluated 4-D only) were heterogeneous and inconclusive.

Use of 4-D or 5-D ultrasound for diagnosis of fetal noncardiac abnormalities lacks evidence that such testing leads to improved health outcomes. No randomized or nonrandomized controlled studies compared management with versus without 4-D/5-D results, and the chain of evidence linking diagnostic performance to clinical benefit is uncertain; therefore clinical utility for these diagnostic indications is unproven.

The literature review found no clinical utility or outcome studies demonstrating that 4-D or 5-D ultrasound use changes management in a way that improves patient-important outcomes for fetal noncardiac abnormalities. Because direct intervention trials are absent and the chain of evidence is uncertain, clinical utility has not been demonstrated.

The referenced chunks do not contain an explicit phrase labeling 4-D or 5-D fetal ultrasound as 'not medically necessary.' Instead, the document characterizes these modalities as investigational for all indications due to insufficient evidence of improved net health outcomes.

Code References and Reporting

Codes table referencedmixed

No codes listed

Reported CPT codesCPT

76499

Unlisted diagnostic radiographic procedure (when specified as a 4-D or 5-D rendering of a fetal ultrasound)

HCPCSHCPCS

No code(s)

No HCPCS code provided in this section

Place/Type of Servicemixed

Outpatient/Physician's Office	Place of service designated
Medical/Diagnostic	Type of service

Prior Authorization, Documentation, and Billing Guidance

Prior Authorization

Prior authorization — Not applicable

Not applicable for prior authorization under this policy. For review of 3-D fetal ultrasound prior authorization, refer to Wellmark's eviCore/Authorization Table.

3-D fetal ultrasound review via Wellmark/eviCore Authorization Table

Denial Risk

Investigational — potential denial

4-D and 5-D fetal ultrasounds are considered investigational for all indications; requests may be denied as investigational because the evidence does not demonstrate improved net health outcomes compared with standard 2-D ultrasound.

Denial Risk

Clinical Background and Scope

Fetal ultrasound is used in pregnancy to assess and monitor gestational age, fetal size and position, cardiac activity/heartbeat, congenital malformations, placental abnormalities, and amniotic fluid volume. 4-D ultrasound provides real-time (time as the fourth dimension) visualization of 3-D images enabling perception of fetal movement and expressions, while 5-D ultrasound aims to automate acquisition from volume data using software/AI to improve image quality, efficiency, and reduce operator dependency. These modalities are evaluated against conventional 2-D ultrasound, the standard imaging comparator.

Terminology and Modalities

Four-Dimensional (4-D) Ultrasound

DefinitionReal-time visualization of 3‑D images where time is the fourth dimension, enabling perception of fetal movement and expressions via dynamic (timelapse) rendering.

Primary useTo display successive 3‑D image updates at very short intervals for assessment of fetal motion and facial/behavioral features.

SynonymAlso known as dynamic 3‑D sonography.

Relation to 2‑D/3‑DRenders 3‑D volume data in real time (adds temporal dimension to 3‑D imaging), distinct from static 3‑D reconstructions and from conventional 2‑D imaging.

Five-Dimensional (5-D) Ultrasound

DefinitionBuilds on 4‑D sonography by automating acquisition of diagnostic images from volume data using software with artificial intelligence to improve image detail, efficiency, and reduce operator dependency.

Policy Revision Timeline

2025-01Annual review / RenewalLatest

Policy renewed following the January 2025 annual review.

2024-01Annual review / Revision

Policy revised during the January 2024 annual review.

2023-06Annual review / Revision

Policy Summary

Payerblue cross blue shield - south dakota

PolicyFour-Dimensional (4-D) and Five-Dimensional (5-D) Fetal Ultrasound(s)

Policy CodePolicy N/A

Change TypePolicy renewal (no material changes)

Effective DateApr 1, 1999

Next Review DateN/A

Key ActionDocument pregnancy status and the specific suspected fetal abnormality when ordering 4-D or 5-D ultrasound and justify incremental value over 2-D.

SourceLink

On This Page

Scope limitation — potential denial for non‑pregnancy ultrasound

This evidence review applies only to fetal ultrasound in pregnancy. Ultrasound performed for non-pregnancy related conditions is outside the scope of this policy and may be denied or reviewed under other applicable policies.

Billing Rule

Code reporting and prior authorization note

Report services using appropriate CPT/HCPCS/revenue and ICD diagnosis codes. When a specific code for a 4‑D or 5‑D rendering is not available, report unlisted CPT 76499 with documentation explaining the procedure.

Use CPT 76499 — Unlisted diagnostic radiographic procedure (when specified as a 4‑D or 5‑D rendering of a fetal ultrasound)
Include appropriate ICD diagnosis codes indicating pregnancy status and suspected fetal abnormality when applicable

Denial Risk

Coding-related denial risk

Missing, incorrect, or nonspecific coding and incomplete documentation may result in claim denial or payment delay. Ensure the claim includes the appropriate CPT/HCPCS code(s), place of service, and supporting clinical documentation describing medical indication and operator qualifications.

Include place of service (Outpatient/Physician's Office) and Type of Service (Medical/Diagnostic) as applicable
If using CPT 76499, attach detailed procedure notes and rationale

Documentation Required

Keepsake imaging documentation

Keepsake or entertainment ultrasounds (non‑medical imaging provided solely for bonding or souvenir purposes) are not consistent with guidance from ACOG and AIUM and may be considered non‑covered. If images are obtained during a medically indicated exam, document the medical indication and that the operator has appropriate training.

Keepsake imaging performed outside a medically indicated exam or without physician oversight may be non‑covered
When provides during a clinical exam, document medical indication and provider/operator qualifications

Step Therapy

Stepwise use of ultrasound modalities

Start with conventional 2‑D ultrasound as the comparator and first‑line imaging modality. 4‑D may be used adjunctively or as follow‑up to 2‑D when additional detail is needed, but it should not replace standard 2‑D imaging.

2‑D ultrasound is the required comparator; document why 4‑D/5‑D is being requested as adjunct or follow‑up
Consider 4‑D/5‑D only when 2‑D findings are inconclusive or further characterization is clinically warranted

Documentation Required

Use after standard imaging — selective, experienced‑operator use

3‑D and 4‑D ultrasound are not recommended for routine first‑trimester anatomical evaluation. Use 3‑D/4‑D selectively and preferably in experienced hands after standard imaging has been performed and when additional diagnostic information could affect management.

Reserve advanced rendering for secondary evaluation by experienced operators
Document that standard imaging was performed and why advanced modalities are needed

Example applicationsIncludes specialized packages such as 5‑D Heart Color, 5‑D CNS+, 5‑D Limb Vol, 5‑D NT, and 5‑D LB for standardized views and measurements.

Intended benefitsAims to standardize plane selection, assist biometric/structural measurements, and decrease human error compared with manual 4‑D acquisition.

Clinical roles noted in documentApplied to biometrics, nuchal translucency, morphological assessment, twin chorionicity/amnionicity, and fetal risk assessment in practice descriptions.

Intervention — 4‑D and 5‑D Ultrasound

Intervention definitionUse of four‑dimensional (4‑D) and five‑dimensional (5‑D) ultrasound for diagnosis of fetal noncardiac abnormalities as an alternative to or potential improvement over 2‑D ultrasound.

Role of 4‑D vs 5‑D4‑D typically denotes real‑time rendering of 3‑D data (time as fourth dimension); 5‑D refers to software‑assisted/automated image extraction from volume datasets.

ScopeIntended for diagnostic evaluation of noncardiac fetal anomalies where additional detail beyond 2‑D may be sought.

Comparator — Two‑Dimensional (2‑D) Ultrasound

ComparatorTwo‑dimensional (2‑D) ultrasound is the standard imaging modality against which 4‑D and 5‑D techniques are evaluated.

Intended use of comparator2‑D ultrasound serves as the initial or reference exam for fetal evaluation; 4‑D/5‑D are considered adjunctive or alternative modalities.

Policy implicationCoverage and clinical utility assessments compare outcomes and diagnostic performance of 4‑D/5‑D relative to established 2‑D imaging.

Spatio‑Temporal Image Correlation (STIC)

Definition (STIC)Spatio‑temporal image correlation (STIC) captures a static or dynamic 3‑D fetal cardiac volume dataset using specialized transducers and analysis software.

Potential capabilitiesCan enhance detection of anatomic cardiac defects and quantify hemodynamics such as ventricular function and cardiac output in research/advanced practice settings.

Validation statusDocument notes STIC has not been validated for routine clinical use despite its potential to augment fetal cardiac assessment.

4‑D/5‑D Related Tools and Practice References

Related tools and applicationsDocument references multiple 4‑D/5‑D tools and software: STIC, 5‑D Heart Color, 5‑D CNS+, 5‑D Long Bone (5‑D LB), 5‑D Limb Vol, 5‑D NT, and HDlive among others.

Practice parameter referencesCites professional guidance and practice parameters from ACOG, AIUM, ACR, ISUOG, ASE, and joint practice parameters relevant to obstetric ultrasound performance.

Evidence and literatureThe policy lists numerous studies and references evaluating 3‑D/4‑D/5‑D techniques (e.g., Kurjak, Hur, Wang) and systematic reviews; roughly ~59 references cited for context and guideline support.

Clinical noteWhile multiple technologies and vendor‑specific applications are described, the policy indicates limited clinical validation/utility for 4‑D/5‑D for improving health outcomes.

Policy revised during the June 2023 annual review.

2022-06Annual review / Revision

Policy revised during the June 2022 annual review.

2021-06Annual review / Renewal

Policy renewed following the June 2021 annual review.

2020-06Annual review / Revision

Policy revised during the June 2020 annual review.

2019-06Annual review / Renewal

Policy renewed following the June 2019 annual review.

2018-06Annual review / Revision

Policy revised during the June 2018 annual review.

2017-06Annual review / Renewal

Policy renewed following the June 2017 annual review.

2016-06Annual review / Revision

Policy revised during the June 2016 annual review.

2015-07Annual review / Renewal

Policy renewed following the July 2015 annual review.

2014-08Annual review / Revision

Policy revised during the August 2014 annual review.

2013-10Annual review / Revision

Policy revised during the October 2013 annual review.

2012-12Annual review / Renewal

Policy renewed following the December 2012 annual review.

2011-12Annual review / Renewal

Policy renewed following the December 2011 annual review.