Summary & Overview

CPT 86008: Allergen Component-Specific IgE Assay

CPT code 86008 represents a laboratory diagnostic procedure that measures allergen-specific immunoglobulin E (IgE) against recombinant or purified allergen components. The code is billed per allergen component and yields quantitative or semiquantitative results used to refine allergy diagnosis and guide clinical decision-making. Nationally, component-resolved IgE testing matters because it enables more precise identification of sensitizations than whole-allergen testing, with implications for targeted immunotherapy selection and risk stratification for severe allergic reactions.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context for component-specific IgE testing, common sites of service, and how the code is applied in laboratory billing. The publication also summarizes available benchmarks and payer coverage themes, highlights relevant coding relationships, and outlines policy updates affecting laboratory immunology services.

This summary is intended for clinicians, laboratory managers, and billing professionals who need a national-level briefing on CPT code 86008, including its clinical purpose, billing unit conventions, and the types of operational and policy considerations that typically affect reimbursement and utilization for allergen component testing.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicare86008CPTallergy-testingimmunologylaboratoryIgEcomponent-resolved-diagnosticsdiagnostic-testing

Billing Code Overview

CPT code 86008 describes a laboratory analysis in which a lab analyst performs the technical testing of a specimen to measure an allergen-specific immunoglobulin E (IgE) using a recombinant or purified allergen component. The result reported is quantitative or semiquantitative, and a single unit of CPT code 86008 is used for each individual allergen component tested.

Service Type: Laboratory diagnostic test (allergen component-specific IgE assay)

Typical Site of Service: Clinical laboratory or hospital laboratory

Data not available in the input.

Clinical & Coding Specifications

Clinical Context

A 28-year-old patient with a history of seasonal allergic rhinitis and suspected peanut sensitization is referred by an allergist for component-resolved IgE testing. The clinician collects a serum specimen during an outpatient clinic visit. The specimen is sent to a clinical laboratory where a lab analyst performs a quantitative immunoassay using a recombinant or purified allergen component to measure allergen-specific IgE levels. Each allergen component tested (for example, Ara h 2 for peanut) is reported as a separate quantitative or semiquantitative result and billed as a single unit of 86008 per component. Typical sites of service include hospital outpatient laboratories, independent clinical diagnostic laboratories, and physician office laboratories with appropriate lab capability. Results are used by the ordering allergist or immunologist to refine diagnosis, guide allergen immunotherapy decisions, or assess cross-reactivity among components.

Coding Specifications

Modifier	Description	When to Use
`26`	Professional component	When billing only the professional interpretation/reporting portion if the facility bills technical component separately.
`TC`	Technical component	When billing only the laboratory technical component (instrumentation, reagents, specimen processing).
`90`	Reference (outside) laboratory	When the test was performed by a laboratory other than the billing provider.
`91`	Repeat clinical diagnostic laboratory test	When the test is repeated on the same day for serial comparison.
`59`	Distinct procedural service	When another distinct test or procedure on the same day must be indicated as separate and not bundled.
`52`	Reduced services	When the test is partially reduced or not performed to full extent.
`53`	Discontinued procedure	When specimen cannot be processed and test was discontinued for clinical reasons.
`76`	Repeat procedure or service by same physician	When the same test is repeated by the same provider (useful when clinically indicated).
`77`	Repeat procedure or service by another physician	When the same test is repeated and performed by a different provider.
`QW`	CLIA waived test	If a waived methodology is used (rare for component-resolved IgE assays) to indicate waived status.

Taxonomy Code	Specialty	Notes
207R00000X	Allergy & Immunology	Ordering and interpreting clinicians for IgE component testing.
207L00000X	Laboratory Medicine	Laboratory directors and pathologists overseeing testing quality and reporting.
207K00000X	Clinical Pathology	Specialists involved in laboratory testing processes and validation.
331K00000X	Pediatrics — Allergy/Immunology	Pediatric allergists frequently order component-resolved IgE testing for children.
207LP2900X	Diagnostic Molecular Laboratory	Laboratories performing specialized immunoassays and component-resolved diagnostics.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`J30.1`	Allergic rhinitis due to pollen	Common indication for allergen-specific IgE component testing to identify sensitizing pollen components.
`J30.2`	Other seasonal allergic rhinitis	Used when seasonal allergens are suspected and component testing helps define sensitization.
`T78.0XXA`	Anaphylactic reaction due to food, initial encounter	Component-resolved testing can identify specific food components (e.g., Ara h 2) associated with systemic reactions.
`Z91.012`	Allergy to peanuts	Direct clinical indication for peanut component IgE testing to assess true sensitization and risk.
`L50.0`	Allergic urticaria	Urticaria with suspected allergen trigger where specific IgE component testing may be informative.
`R06.2`	Wheezing	Respiratory symptoms with suspected allergic etiology prompting allergen-specific IgE testing.
`Z13.020`	Encounter for routine child health examination with abnormal findings of immunology (screening)	May be used when evaluating atopic risk or screening in high-risk patients with component testing.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`86003`	Allergen specific IgE; quantitative or semiquantitative, each allergen (singleplex)	Alternative single allergen-specific IgE assay using whole allergen extract rather than a component; may be ordered alongside `86008` when component testing is not available or to compare extract-level IgE.
`86038`	Antibody; direct transmission, screen (e.g., enzyme immunoassay)	General antibody immunoassay methodology code sometimes used in laboratory workflows; relates to assay methods but not specific for component IgE.
`87338`	Antibody; severe combined immunodeficiency screening or other specific antibody assays (note: use clinically appropriate IFA/ELISA codes)	Related immunologic testing codes performed in immunology workups that may accompany allergen-specific IgE testing.
`99000`	Handling and/or conveyance of specimen (may be facility-specific)	Administrative/handling tasks associated with specimen transport to reference laboratories performing `86008`.
`36415`	Collection of venous blood by venipuncture	Common preceding procedure for specimen collection before performing `86008`.