CPT code 88285 represents an analyst-performed cytogenetic chromosome analysis in which an analyst counts cells for abnormalities identified by a separately reportable code and then counts additional cells as needed. This code captures a focused, follow-up laboratory task that refines or confirms chromosomal findings and can affect diagnostic classification, prognosis, and downstream clinical management. Nationally, accurate reporting of 88285 is important for laboratory quality measurement, appropriate billing for additional analytic effort, and clear clinical documentation of cytogenetic work.

Key payers in scope include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of the code’s clinical and billing purpose, typical sites of service, common modifiers, and where this service fits in cytogenetics workflows. The publication provides benchmarks and comparative guidance on payer coverage language when available, summaries of coding conventions tied to cytogenetic analysis, and the clinical context in which additional cell counting is performed. Data not available in the input will be noted where relevant. This resource is aimed at laboratory managers, coders, and policy analysts seeking a concise national summary of CPT code 88285 and its role in cytogenetic diagnostic services.