CurrentBlue Cross Blue Shield - IllinoisPolicy CPCPLAB023

Diagnosis of Idiopathic Environmental Intolerance (lab testing reimbursement)

This document defines Blue Cross Blue Shield Illinois reimbursement rules for laboratory testing related to idiopathic environmental intolerance and related environmental/toxicology/nutritional profiling, and applies to providers submitting claims to BCBSIL plans.

Policy Summary

PayerBlue Cross Blue Shield - Illinois

PolicyDiagnosis of Idiopathic Environmental Intolerance (lab testing reimbursement)

Policy CodePolicy CPCPLAB023

Change TypeNew policy

Effective DateSep 5, 2025

Next Review Date

Key ActionUpon request, providers should submit additional documentation and must submit accurate documentation using valid code combinations.

SourceLink

POLICY UPDATE CHANGES

New policy established with effective date 01/01/2026.

multiplenon-reimbursable test categories listed

~40codes included in example code list

11 codesper-date-of-service unit maximums

CPCPLAB023internal identifier

Coverage Criteria

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Non-reimbursable tests and circumstances

Tests and test categories that the Plan does not reimburse in the circumstances described:

Laboratory tests designed to confirm the diagnosis of idiopathic environmental illness are not reimbursable in all circumstances.

Screening of blood, saliva, serum, plasma, urine, and/or stool samples for volatile solvents, organic acids, and organophosphates is not reimbursable in all circumstances.

Profiling of phthalates and parabens using blood, serum, plasma, saliva, urine, and/or stool samples is not reimbursable in all circumstances.

Profiling of chlorinated pesticides (including DDE and DDT) using blood, serum, plasma, saliva, urine, and/or stool samples is not reimbursable for asymptomatic individuals.

Testing of blood, serum, plasma, saliva, urine, and/or stool samples for carnitine sufficiency, oxidative stress and antioxidant sufficiency, detoxification adequacy, methylation sufficiency status, lipoic acid and CoQ10 sufficiency, and/or intestinal hyperpermeability is not reimbursable for asymptomatic individuals and/or during general encounters without abnormal findings.

Testing of blood, serum, plasma, saliva, urine, and/or stool samples for vitamin sufficiency, mineral sufficiency, and/or nutritional analysis is not reimbursable for asymptomatic individuals and/or during general encounters without abnormal findings.

Breath hydrogen and/or breath methane testing is not reimbursable to assess or diagnose idiopathic environmental intolerance; food allergies and sensitivities; carbohydrate sensitivity or intolerance; bacterial overgrowth (including but not limited to small intestinal bacterial overgrowth); digestive disorders; constipation, diarrhea, or flatulence; neurological/neuromuscular disorders; rosacea; or obesity.

Testing of blood, serum, urine, cerebrospinal fluid, fingernails, hair, and/or stool samples for metals is not reimbursable for asymptomatic individuals and/or during general encounters without abnormal findings.

Coding and Reimbursement Limits

Listed procedure codes with unit limits or inclusionCPT

83918	Organic acids; total, quantitative, each specimen
83919	Organic acids; qualitative, each specimen
83921	Organic acid, single, quantitative
82127	Amino acids; single, qualitative, each specimen
82136	Amino acids, 2 to 5 amino acids, quantitative, each specimen
82139	Amino acids, 6 or more amino acids, quantitative, each specimen
84585	Vanillylmandelic acid (VMA), urine
83150	Homovanillic acid (HVA)
83497	Hydroxyindolacetic acid, 5-(HIAA)
82656	Elastase, pancreatic (EL-1), fecal, qualitative, or semi-quantitative

Additional listed codesmixed

82108
82300
82379
82380
82441
82495
82507
82525
82542
82653

1–10 of 32

1/4

Per-date-of-service unit maxima — CPT limits

83918Organic acids; total, quantitative — maximum 2 units per date of service is ALLOWED.

83919Organic acids; qualitative — maximum 1 unit per date of service is ALLOWED.

83921Organic acid, single, quantitative — maximum 2 units per date of service is ALLOWED.

82127Amino acids; single, qualitative — maximum 1 unit per date of service is ALLOWED.

82136Amino acids, 2 to 5 amino acids, quantitative — maximum 2 units per date of service is ALLOWED.

82139Amino acids, 6 or more amino acids, quantitative — maximum 2 units per date of service is ALLOWED.

84585 / 83150 / 83497 / 8265684585 (VMA, urine), 83150 (HVA), 83497 (HIAA), 82656 (Elastase, pancreatic) — each maximum 1 unit per date of service is ALLOWED.

Provider Actions and Documentation

Documentation Required

Documentation and claims review — submit accurate documentation and respond to requests

Providers must submit accurate documentation and code claims using valid code combinations per HIPAA-approved code sets and industry coding guidelines. Claims are subject to code edit protocols and review against benefit terms, provider contracts, medical policies, clinical payment and coding policies, and coding software logic.

Submit additional documentation upon request to support claims and services billed.
Use valid code combinations from HIPAA-approved code sets (CPT, HCPCS, ICD-10-CM/PCS, NDC, DRG guidelines, CMS NCCI policy manual, CCI edits).
Code claims according to industry standard coding guidelines (Uniform Billing, AMA CPT resources, CPT Assistant).

Definitions and Plan Governance

Plan documents

Plan documents govern conflictsIf a conflict arises between this Clinical Payment and Coding Policy and any plan document under which a member is entitled to Covered Services, the plan document will govern. Plan documents include Certificates of Health Care Benefits, benefit booklets, Summary Plan Descriptions, and other coverage documents.

Provider contracts governIf a conflict arises between this policy and any provider contract pursuant to which a provider participates in and/or provides Covered Services, the provider contract will govern.

Review for product applicabilityThe Plan has implemented lab management reimbursement criteria; not all requirements apply to every product — providers are urged to review Plan documents for eligible coverage.

Covered Services / conflict resolution

Covered Services precedenceCovered Services are governed by the applicable plan document or provider contract in the event of a conflict with this policy; the plan document or provider contract will control.

Provider responsibility for accurate claimsProviders are responsible for submission of accurate documentation and for coding claims using valid, industry-standard code combinations and guidelines.

Possible claim review and documentation requestsClaims are subject to claim review and code edit protocols; upon request, providers should submit additional documentation to support services billed.