Summary & Overview
CPT 86235: Extractable Nuclear Antigen (ENA) Antibody Assay
CPT code 86235 denotes a laboratory assay for antibodies to extractable nuclear antigens (ENA), detecting autoantibodies such as anti-RNP, anti-SS A/SS B, anti-Sm, and anti-Scl 70. This immunologic test is clinically important for diagnosing and characterizing systemic autoimmune connective tissue diseases, including lupus, Sjogren’s syndrome, mixed connective tissue disease, and systemic sclerosis. Nationally, ENA testing is a common component of rheumatologic workups and impacts diagnostic pathways, specialty referrals, and subsequent management decisions.
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 purpose of the assay, typical sites of service, and the role of CPT code 86235 in laboratory billing. The publication outlines common billing considerations, payer coverage patterns, and benchmarking context where available. It also summarizes clinical context for ordering clinicians and coding staff, and highlights where data were not provided.
This summary equips administrators, laboratory directors, and coding professionals with a national-level view of CPT code 86235, its clinical relevance, and the types of information policymakers and payers consider when assessing coverage and reimbursement for ENA antibody testing.
Billing Code Overview
CPT code 86235 describes a laboratory assay that evaluates a patient’s serum for antibodies to extractable nuclear antigens (ENA). ENAs include antibodies such as anti-ribonuclear protein (RNP/nRNP), anti-Sjogren’s Syndrome A and B (SS A, SS B), anti-Smith (Sm), and anti-scleroderma (Scl 70). This test is used to detect specific autoantibodies associated with systemic autoimmune connective tissue diseases.
Service type: Clinical laboratory serologic assay for ENA antibodies.
Typical site of service: Clinical laboratory or hospital laboratory; specimens are collected in outpatient clinics, physician offices, or hospital outpatient departments for processing in a laboratory setting.
Clinical & Coding Specifications
Clinical Context
A 42-year-old female presents to a rheumatology clinic with a 6-month history of fatigue, arthralgias, photosensitive rash, and dry eyes. The clinician orders serologic testing to evaluate for connective tissue disease, including an extractable nuclear antigen (ENA) panel to detect antibodies such as anti-SS-A, anti-SS-B, anti-Sm, anti-RNP, and anti-Scl-70. A phlebotomy nurse obtains a serum specimen in the outpatient clinic; the sample is sent to the clinical laboratory. A medical laboratory scientist performs an immunoassay or multiplex bead assay per laboratory protocol to identify individual ENA antibodies. Results are reviewed by the laboratory director and reported to the ordering rheumatologist, who integrates the results with clinical findings to assist in diagnosis and management.
Typical site of service: outpatient clinic for specimen collection and clinical laboratory (central lab) for assay processing.
Typical workflow:
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Order placed by clinician in ambulatory EHR with indication for autoimmune/connective tissue disease testing.
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Patient presents to clinic; phlebotomy obtains blood specimen labeled with demographics and clinical information.
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Specimen transported to central laboratory; accessioning and specimen preparation performed.
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Laboratory analyst runs ENA testing (immunoassay/multiplex) corresponding to
86235and documents results and quality controls. -
Laboratory director reviews results; final report released to ordering provider for clinical correlation.