Proteomic Testing for Systemic Therapy in Non-Small-Cell Lung Cancer
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This policy governs the use of serum proteomic tests (including the VeriStrat assay) to predict survival or guide systemic therapy selection in patients with non-small-cell lung cancer for members of Blue Cross and Blue Shield of Kansas.
No material clinical or coverage changes in this revision.
Coverage Determination
Not covered (experimental/investigational)
No clinical use is supported by this policy.
Experimental / Investigational
Not covered
Policy statement applies to all intended uses and patient populations in NSCLC.
Clinical validity evidence
Evidence summary (study-level prognostic associations)
See study tables and cohort summaries in the evidence review (eg, Taguchi et al., Grossi et al., Spigel et al.).
Evidence requirement node
Evidence summary informing coverage considerations
Derived from lack of identified studies and limitations in study design and applicability.
Evidence-based coverage considerations
Evidence summary regarding use of VeriStrat to predict therapy response in NSCLC:
Prognostic associations reported across multiple study types.
See PROSE (positive interaction) and subsequent trials with inconsistent findings.
Described in study relevance and limitation summaries.
Evidence synthesis
Summary of evidence-based conclusions
No direct RCT evidence demonstrates improved outcomes from test-guided management; analytic identification of constituent proteins remained incomplete in several reports.
The policy states that the use of serum proteomic testing, including the commercially described VeriStrat assay, is considered experimental / investigational for all uses in the management of non-small-cell lung cancer (NSCLC). This classification excludes proteomic testing from coverage for any intended clinical use in NSCLC because the evidence does not establish clinical utility.
Proteomic assays (including VeriStrat) are explicitly excluded from coverage for all uses in NSCLC as experimental/investigational; the policy makes no supported clinical indications for proteomic testing to predict survival or to guide selection of systemic therapy in NSCLC.
The provided excerpts do not define detailed patient-selection or exclusion criteria tied to coverage decisions. Study cohorts often excluded small cell histology and in some analyses excluded or separately reported squamous versus nonsquamous histology, but the policy text does not provide explicit clinical eligibility rules for proteomic testing.
No published studies were identified that used VeriStrat to inform therapeutic decision-making for patients with stage I or II NSCLC after surgical resection; the evidence review explicitly notes the absence of studies applying the proteomic test in this post-surgical early-stage population.
The policy indicates there are no identified studies using VeriStrat to inform therapy for patients with stage I or II NSCLC who are medically inoperable or post-surgery; consequently, no evidentiary support exists for those early-stage clinical scenarios.
The review found no published studies that assessed use of VeriStrat to inform treatment selection or imaging surveillance for newly diagnosed stage I or II NSCLC; the evidence base for these indications is absent in the cited literature.
Inclusion of CPT/HCPCS codes in the policy is informational only. The policy cautions that code listing does not constitute coverage; listed codes are medically necessary only if performed according to the Policy section and applicable member contract.
Based on the evidence review, proteomic testing (including VeriStrat) is not established as medically necessary for prediction of survival or for selection of systemic therapy in NSCLC because clinical utility (improved patient health outcomes when management is guided by the test) has not been demonstrated.
The rationale for the policy conclusion is that although VeriStrat classification (good vs poor) is associated with overall and progression-free survival in multiple retrospective cohorts and some randomized-trial sample analyses, there is no direct evidence that using the test to guide therapy selection improves patient outcomes; clinical validity is limited by heterogeneous populations, outdated treatment contexts, and lack of independence from EGFR-variant status.
While the document describes that proteomic testing is considered experimental/investigational, the provided fragments do not contain explicit phrasing that uses the label 'not medically necessary' in every chunk; the policy instead conveys exclusion via the experimental/investigational determination.
The evidence does not support using VeriStrat to predict response to first-line targeted therapies or first-line chemotherapy in newly diagnosed advanced NSCLC. Randomized trials and cohort analyses either did not use VeriStrat to direct first-line therapy or enrolled populations and used treatment strategies that are not consistent with current guideline-based sequencing.
Using VeriStrat to direct EGFR tyrosine kinase inhibitor (TKI) therapy in EGFR wild-type or unselected populations is not aligned with contemporary guidelines; NCCN and trial evidence indicate EGFR TKIs should be used based on confirmed sensitizing EGFR variants, and several trials that evaluated VeriStrat did not reflect current molecular-testing–driven treatment pathways.
A central evidence gap is that no trials were identified demonstrating that management strategies guided by VeriStrat improve health outcomes. The available data are primarily prognostic associations and do not provide direct evidence of clinical utility for therapy selection.
The policy reiterates that procedure and diagnosis codes shown are for informational purposes only; the presence of a code in the coding section does not automatically indicate coverage—codes are considered medically necessary only when the service meets the policy's clinical criteria and member contract.
Indications Studied / Considered
Prognostic assessment in advanced NSCLC
Prognostic assessment in advanced NSCLC
Studies included chemotherapy-naive and previously treated patients; many cohorts were predominantly non-squamous histology.
Prognostic classification evidence
Prognostic classification evidence
Examples include Wu et al., Yang et al., and other validation analyses reporting significant HRs for OS and PFS.
Assessment of prognosis in advanced NSCLC cohorts
Assessment of prognosis in advanced NSCLC cohorts — investigational/prognostic biomarker findings
Retrospective subsets often lacked comparator arms representative of current standard care.
Lack of direct outcome improvement evidence
Lack of direct outcome improvement evidence
Preferred evidence would be RCTs comparing management with and without the test; such direct evidence is not available for contemporary treatment pathways.
Use of mass spectrometric 8-protein signature (VeriStrat-type) studied and listed in coding/references
Use of mass spectrometric 8-protein signature (VeriStrat-type) studied and listed in coding/references
Analytic identity of all constituent proteins/features remained under investigation in several studies; see coding section for CPT 81538.
Not Covered / Exclusions
Proteomic testing, including VeriStrat, is specifically listed in the 'Not covered' section as not covered for prediction of survival or selection of systemic therapy in NSCLC, reflecting the experimental/investigational policy stance.
The policy reiterates that proteomic assays (including VeriStrat) are excluded from coverage for any use to predict survival or guide systemic therapy selection in NSCLC because clinical utility has not been demonstrated.
Although the policy states proteomic testing is not covered, the provided excerpts do not enumerate specific, granular test-use exclusions tied to particular clinical scenarios beyond the broad experimental/investigational classification.
The policy highlights the lack of evidence supporting use of VeriStrat to select therapy in stage I/II post‑surgery or medically inoperable stage I/II NSCLC, and therefore these indications are not supported for coverage.
Use of VeriStrat to select first-line targeted therapies or first-line chemotherapy in newly diagnosed advanced NSCLC is not supported by identified studies and is therefore not covered under the evidence presented.
The policy identifies a key evidence limitation: there is no direct evidence that management guided by VeriStrat improves health outcomes, which underpins the 'not covered' determination.
The coding section reiterates a cautionary note that listing a code does not guarantee coverage. No explicit test-specific code-based exclusions are provided in the excerpt.
Procedure and Billing Codes
Coding and coverage caveat
The inclusion or exclusion of the codes listed in this section is for informational purposes only and does not imply that services described by these codes are a covered benefit or will be reimbursed. Coverage and payment depend on the member's contract and whether the service meets the medical necessity criteria in this policy.
Coding and prior authorization note
CPT codes 81235 and 81538 are listed in this policy. These codes are considered medically necessary only when performed in accordance with the medical necessity criteria and other requirements described in this policy. Prior authorization or documentation requirements may apply per the payer's policies and the member's benefit plan.
Provider Steps and Documentation Requirements
Prior authorization and benefit verification — verify benefits and authorize where required
Proteomic testing (including VeriStrat) is categorized as experimental/investigational and not supported for coverage; providers should verify member benefits and obtain prior authorization where required by the member’s contract, recognizing the policy does not support coverage.
- Verify member benefits with BCBSKS Customer Service
- Obtain prior authorization when required by the member contract, but note policy stance
Prior authorization not applicable — experimental/investigational tests not covered
Proteomic testing (e.g., VeriStrat) is classified as experimental/investigational and is not a covered service; prior authorization cannot be used to render these tests covered for NSCLC management.
- Tests are considered experimental/investigational for all NSCLC uses
- Prior authorization will not make an excluded test covered
Prior authorization not specified — follow member contract processes
The provided excerpts do not specify explicit prior authorization requirements for proteomic testing; providers should follow member contract and plan-specific prior authorization processes.
- No explicit prior authorization rules stated in the policy excerpts
Prior authorization likely required — unsupported indications likely denied
Proteomic testing to predict response for first‑line therapies or to guide treatment in early‑stage (I/II) post‑surgical patients is unsupported by identified studies; requests for such uses are likely to require prior authorization and are likely to be denied absent evidence of investigational approval.
- No studies identified using VeriStrat to guide first‑line therapy or early‑stage post‑surgical treatment
- Such indications lack evidentiary support and are likely to be denied
Prior authorization considerations — PROSE evaluated second‑line contexts, not first‑line
Evidence does not show VeriStrat has been used to direct first‑line therapy in newly diagnosed advanced NSCLC; the PROSE RCT evaluated VeriStrat in a second‑line context (erlotinib vs chemotherapy), limiting applicability to first‑line decisions.
- PROSE trial evaluated VeriStrat in second‑line erlotinib vs chemotherapy
- No direct evidence supporting first‑line use to direct therapy selection
Established genomic testing preferred — use guideline-directed molecular testing
Guideline-directed molecular testing for established genomic alterations (eg, sensitizing EGFR variants) guides targeted TKI use; proteomic testing is not a substitute and is not recommended by this policy for directing targeted therapy.
- NCCN recommends EGFR‑variant testing to guide EGFR TKI selection
- Proteomic assays are not endorsed as an alternative to established genomic testing
Reference to standard management — follow guideline-based care
Standard guideline-based systemic therapy is the comparator practice; the policy indicates proteomic testing has not been established to change standard management pathways.
- Standard medical management remains the comparator
- Proteomic testing is not established to alter guideline-based therapy selection
No step therapy rules specified — policy does not define sequencing
No step therapy rules are provided in the policy excerpts; the document reviews clinical studies and coding but does not specify step therapy sequencing or authorization requirements.
- Policy does not define step therapy rules in provided excerpts
Adherence to current treatment sequencing — studies used outdated regimens
Many evaluated studies used treatment regimens (eg, EGFR TKIs in EGFR‑unknown or wild‑type populations, or EGFR+VEGF combinations) that are no longer consistent with current guideline-recommended sequencing; providers should adhere to current standards when considering treatment sequencing.
- Studies used outdated treatment contexts (EGFR TKI in EGFR‑unknown/wild‑type)
- Apply current guideline-recommended sequencing rather than proteomic classification
Relevance to current step therapy — trial populations differ from current practice
Trials often used erlotinib in populations not consistent with current guideline-recommended sequencing (eg, EGFR wild‑type patients), limiting the relevance of those trials to contemporary step therapy pathways.
- TOPICAL and PROSE included erlotinib use in unselected/EGFR‑unknown populations
- Applicability to current sequencing is limited
Provider actions not applicable — no step therapy sequencing defined
This policy focuses on evidence review and coding; it does not define step therapy sequencing requirements or impose specific step edits based on proteomic classification.
- Policy does not establish step therapy rules; follow plan-specific utilization management if present
Benefit verification — verify benefits and legal mandates
Verify member benefits and consider state/federal mandates and the member’s contract language before determining eligibility for coverage of proteomic testing.
- Contact BCBSKS Customer Service to verify benefits
- Consider plan and state/federal mandates first
Required test context documentation — record assay type, timing, and intended use
When submitting proteomic test results or requests, document that the assay is a serum proteomic test performed prior to treatment or at progression and clearly state the intended use (prediction of OS/PFS or to influence selection of systemic therapy).
- Document test type (serum proteomic assay), timing (pre‑treatment or at progression), and intended use (prognosis or treatment selection)
Specimen and clinical data reporting — record sample type, histology, performance status
Document specimen type and pertinent clinical data that were used for testing—studies typically used pretreatment frozen serum or baseline plasma samples and reported tumor histology and ECOG performance status where available.
- Record specimen (pretreatment frozen serum or baseline plasma)
- Include histology and performance status in documentation
Required clinical outcome documentation — record OS/PFS and adjustment variables
When proteomic test results are used in clinical decision‑making, include documentation of relevant clinical outcomes (OS, PFS) and adjustment variables considered (age, sex, histology, performance status) as reported in evidence summaries.
- Document OS and PFS outcomes and any adjustments for age, sex, histology, or ECOG PS
Supporting trial documentation — include trial cohort details when relevant
Clinical trial reports included sample sizes, histology, ECOG performance status distribution, and EGFR‑variant status where available; include these supporting trial data when relevant to test interpretation.
- Include trial/sample sizes, histology, ECOG PS, and EGFR‑variant status if available
Medical necessity and member contract — codes only medically necessary per Policy and contract
Procedures and codes listed in the coding section are medically necessary ONLY if performed according to the Policy section; refer to the member contract at the time of service to determine coverage eligibility.
- Codes medically necessary only if consistent with Policy criteria
- Confirm member contract benefits at time of service
Provider actions summary — proteomic testing considered experimental/investigational
Use of proteomic testing (including VeriStrat) for any use in the management of non‑small‑cell lung cancer is considered experimental/investigational and not supported for coverage; providers should not expect coverage unless policy and member contract criteria are met.
- Proteomic testing (including VeriStrat) is experimental/investigational for all NSCLC uses
- Tests are not supported for coverage under this policy
Denial for experimental/investigational tests — likely denial basis
Requests for proteomic testing for NSCLC are likely to be denied on the basis that these tests are experimental/investigational and not medically necessary according to this policy.
- Denial reason: experimental/investigational exclusion for all uses in NSCLC
No explicit prior authorization/denial triggers — follow standard processes
The policy does not identify specific prior authorization or documentation triggers that would automatically permit coverage; absence of explicit triggers in the excerpts means usual benefit verification and prior authorization processes apply.
- No explicit prior authorization or denial triggers stated in provided text
Lack of evidence for first‑line use — no supporting studies
No studies identified use of VeriStrat to guide first‑line targeted therapy or first‑line chemotherapy in newly diagnosed advanced NSCLC; lack of direct evidence for first‑line use may lead to denial for such intended use.
- No studies supporting use to guide first‑line therapy
- Requests for first‑line guidance likely unsupported
Limits of evidence for early-stage NSCLC — no supporting studies for stage I–II uses
No studies were identified that used VeriStrat to inform therapeutic options for stage I–II NSCLC after surgery or in medically inoperable stage I–II disease; such uses are unsupported by the evidence reviewed and may be denied.
- No evidence for stage I–II post‑surgical or medically inoperable stage I–II uses
Coding and coverage caveat — code listing not coverage (repeat)
Inclusion of CPT or other codes in the policy’s coding section does not constitute member coverage; listed codes are medically necessary only if the procedure is performed according to the Policy section and member contract.
- Code listing is informational; verify policy clinical criteria and member contract for coverage
Coding inclusion note — listing does not imply coverage (repeat)
Inclusion or exclusion of codes in the document does not imply coverage or reimbursement; the presence of a code does not change the policy’s experimental/investigational stance.
- Code inclusion does not alter coverage determination
Ordering clinician unspecified — no explicit ordering requirements
The excerpts do not specify who may order the test; while oncology specialists commonly order proteomic testing in studies, the policy provides no explicit ordering‑clinician requirements.
- No explicit ordering-provider restrictions in policy excerpts
- Oncology specialists commonly involved in study settings
Ordering clinician context — oncology specialists commonly involved
No specific ordering-provider requirements are provided in the policy excerpt; tests in the literature were commonly ordered by treating medical oncologists in trial and clinical contexts.
- Ordering by treating medical oncologists is typical in studies
- Policy contains no formal ordering restrictions
Ordering context — tests performed in oncology trial settings
Studies were typically performed in oncology trial settings and tests were ordered in that context; the policy does not prescribe which specialties may order the test.
- Tests ordered in oncology trial settings
- Policy does not restrict ordering specialties
Ordering-provider study notes — policy does not specify specialties
Physician decision‑making studies report tests were ordered for NSCLC, but the policy does not specify which specialties may order the test; no explicit ordering‑provider requirements are provided in this excerpt.
- Physician decision‑making studies included various ordering clinicians
- No ordering restrictions in policy excerpt
Ordering provider absence — follow plan procedures
No specific ordering‑provider requirements are provided in this policy excerpt; providers should follow their plan’s ordering and authorization procedures.
- Follow plan‑specific ordering and prior authorization rules
Definitions and Test Descriptions
Clinical Background
The policy background notes that NSCLC comprises the majority of lung cancers and that prognosis depends on stage; advanced disease has poor 5-year survival, providing clinical context for why prognostic markers have been investigated but underscoring the need for outcome-improving management strategies.
Eligibility Criteria
No eligibility requirement top-level nodes are specified in the provided policy excerpt.
No eligibility requirement top-level nodes are specified in the provided policy excerpt.
No eligibility requirement top-level nodes are specified in the provided policy excerpt.
No eligibility requirement top-level nodes are specified in the provided policy excerpt.
No eligibility requirement top-level nodes are specified in the provided policy excerpt.
No eligibility requirement top-level nodes are specified in the provided policy excerpt.
No eligibility requirement top-level nodes are specified in the provided policy excerpt.
Policy Revision Timeline
Policy originally posted (original effective date).
Current effective date set for this policy.
Policy most recently reviewed; clinical evidence and coding sections updated as needed during review.
The policy references ongoing and published trials relevant to VeriStrat; among them, PROSE, EMPHASIS, TOPICAL, BR.21 analyses, LUX-Lung 8 analyses, and a noted ongoing observational trial (NCT03289780) are cited in the reference list.
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