CPT code 83625 denotes laboratory measurement of lactate dehydrogenase (LDH) isoenzymes, typically performed on a serum specimen to fractionate LDH into its component isoenzymes. This test helps clinicians localize tissue injury or hemolysis when overall LDH is elevated and is used across inpatient and outpatient laboratory settings nationwide. The code is clinically important for differential diagnosis in hepatic, cardiac, renal, and hematologic conditions and affects utilization and reimbursement patterns for clinical laboratories.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of CPT code 83625, clinical context for when LDH isoenzyme testing is ordered, and what service settings typically bill this code. The publication summarizes benchmarking and payment considerations where available, notes common billing modifiers, and highlights areas where policy updates or coding guidance can affect coverage and claims processing. Practical items covered include typical site-of-service considerations, how the code fits into laboratory service lines, and national-level implications for utilization and laboratory workflow.

Data not available in the input for some items such as associated taxonomies, specific ICD-10 pairings, payer-specific rates, and related codes.