Headline: CPT code 87188: Macrobroth Dilution Antimicrobial Susceptibility Testing

Lead: CPT code 87188 identifies the technical laboratory procedure for assessing a culture isolate’s susceptibility to multiple antimicrobial agents using macrobroth dilution techniques. This test supports targeted antibiotic selection and informs infection control and stewardship programs across clinical settings.

What this code represents and why it matters: CPT code 87188 covers the laboratory-based, technical component of antimicrobial susceptibility testing performed by a lab analyst using macrobroth dilution methods. As bacterial resistance patterns evolve, standardized susceptibility testing remains essential for appropriate antimicrobial therapy, public health surveillance, and stewardship efforts nationwide.

Key payers covered: Analysis addresses major national payers, including Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.

What readers will learn: The publication provides benchmarks and clinical context for CPT code 87188, outlines typical sites of service and service type, and summarizes common payer considerations. It highlights how the procedure fits into laboratory workflows and clinical decision-making. Policy or coding updates and payer-specific coverage patterns are summarized where available. Data not available in the input are noted when applicable.