Summary & Overview
CPT 82615: Urine Test for Cystine and Homocystine (Cystinuria Evaluation)
CPT code 82615 identifies a urine biochemical assay for cystine and homocystine, used to evaluate suspected cystinuria — an inherited disorder that predisposes patients to recurrent kidney stones and urinary tract infections. As a targeted diagnostic laboratory procedure, this test plays a role in confirming a metabolic cause of nephrolithiasis and guiding subsequent medical management and genetic counseling.
Key payers in this national overview include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical context for the test, typical sites of service, and the scope of services represented by this code. The publication outlines common billing and coding considerations, payer coverage patterns, and benchmarks where available. It also highlights policy issues that affect laboratory reimbursement and access to specialty metabolic testing.
This summary is intended for healthcare administrators, laboratory billing staff, and clinicians seeking a high-level reference on CPT code 82615. Readers can expect clear definitions, the clinical rationale for testing, and guidance on where to look for payer-specific coverage details. Data not available in the input is identified explicitly in relevant sections.
Billing Code Overview
CPT code 82615 describes a laboratory test that detects the amino acids cystine and homocystine in a urine specimen. Neither substance is normally present in urine; their detection supports evaluation for cystinuria, an inherited metabolic disorder associated with recurrent kidney stones and repeated urinary tract infections.
Service Type: Urine biochemical diagnostic test
Typical Site of Service: Clinical laboratory or hospital laboratory
Clinical & Coding Specifications
Clinical Context
A typical patient is a young adult or child with recurrent nephrolithiasis or recurrent urinary tract infections and a history suggestive of an inherited amino acid transport disorder. The patient presents to a urology or nephrology clinic for evaluation of recurrent kidney stones, hematuria, flank pain, or recurrent UTIs. The clinician orders a urine amino acid analysis specifically to detect cystine and homocystine using assay 82615. A timed or random urine specimen is collected per laboratory instructions, labeled, and transported to the clinical laboratory. The laboratory performs qualitative or quantitative testing for urinary cystine and homocystine; results are reviewed by the ordering clinician for diagnosis of cystinuria or homocystinemia, to guide metabolic evaluation, stone prevention counseling, and referral for genetic testing when indicated. Typical sites of service include hospital outpatient laboratory, freestanding clinical laboratory, outpatient hospital clinic, or specialized metabolic testing centers.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when only the professional component (interpretation) of the laboratory test is billed separately by a physician or qualified provider. |