Summary & Overview
CPT 84410: Bioavailable Testosterone Assay, Serum
CPT code 84410 identifies a laboratory assay that measures bioavailable testosterone in serum, a clinically important marker for assessing androgen status in adults. This laboratory test matters nationally because it informs diagnosis and management of conditions such as hypogonadism, infertility, and disorders of sexual development, and it can affect follow-up endocrine evaluations and therapeutic decisions. Key payers included in the analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.
Readers will find a concise overview of the clinical purpose of CPT code 84410, typical sites of service, and the service classification as a laboratory diagnostic test. The publication summarizes payer coverage context and common billing modifiers encountered in practice. It also provides benchmarks and policy-relevant considerations for billing and coding of laboratory services, plus a clinical context that explains when bioavailable testosterone testing is generally ordered and interpreted. Data not available in the input is noted where applicable.
Billing Code Overview
CPT code 84410 measures bioavailable testosterone in patient serum. The test quantifies the fraction of testosterone that is not bound to sex hormone–binding globulin and is therefore available to tissues, providing clinically relevant information about androgen status.
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Service type: Laboratory diagnostic test
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Typical site of service: Clinical laboratory or hospital outpatient laboratory
Clinical & Coding Specifications
Clinical Context
A 45-year-old male presents to an outpatient endocrinology clinic with complaints of fatigue, decreased libido, and erectile dysfunction. The clinician orders a laboratory test to measure bioavailable testosterone from a fasting serum sample to assess androgen status and distinguish between total testosterone and the fraction available for tissue uptake. The typical clinical workflow includes: collection of a venous blood sample at the outpatient laboratory or hospital phlebotomy station, specimen labeling and transport to the clinical laboratory, analysis by an immunoassay or equilibrium dialysis followed by calculation or direct measurement of bioavailable testosterone, result verification by a laboratory analyst, and reporting to the ordering clinician. Results may trigger further endocrine evaluation, medication adjustment (for example, testosterone replacement therapy), or referral to urology or reproductive endocrinology. Typical site of service: outpatient laboratory, hospital outpatient department, or physician office with phlebotomy services. Service type: moderate complexity quantitative laboratory test performed by a clinical laboratory analyst.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when reporting the professional interpretation or oversight separate from the technical component |