Summary & Overview
CPT 82552: Creatine Kinase Isoenzyme Analysis
CPT code 82552 represents laboratory measurement of creatine kinase isoenzymes (CK/CPK isoenzymes), a diagnostic test used to determine the tissue origin of elevated CK levels and to assist clinical evaluation of muscle and cardiac injury. Nationally, CK isoenzyme testing remains a clinical tool for distinguishing cardiac from skeletal muscle sources of enzyme elevation, with implications for acute care, inpatient management, and outpatient follow-up.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context for CK isoenzyme testing, typical sites of service, and common billing considerations associated with CPT code 82552.
The publication summarizes benchmarks and payer coverage themes relevant to laboratory medicine and diagnostic coding, highlights clinical scenarios where CK isoenzyme analysis is applied, and notes where the input data is incomplete. Data not available in the input is identified explicitly. The content is intended for a national audience of coding professionals, laboratory managers, and policy analysts seeking clear information on the purpose and billing context of CPT code 82552.
Billing Code Overview
CPT code 82552 measures creatine kinase (CK) isoenzymes in a patient specimen. The test identifies and quantifies different isoenzyme forms of creatine kinase (also called creatine phosphokinase or CPK), which are present in tissues such as heart, brain, and skeletal muscle. Measurement of CK isoenzymes helps differentiate the tissue source of CK elevations and supports clinical evaluation of muscle injury, myocardial injury, and certain neurological conditions.
Service type: Clinical laboratory diagnostic test — creatine kinase isoenzyme analysis
Typical site of service: Clinical laboratory or hospital laboratory; specimens commonly collected in outpatient clinics, emergency departments, or inpatient settings
Clinical & Coding Specifications
Clinical Context
A 58-year-old man presents to the emergency department with acute-onset central chest pain radiating to the left arm and shortness of breath. The emergency physician orders cardiac enzyme testing, including measurement of creatine kinase isoenzymes, to evaluate for myocardial injury. A phlebotomist collects a blood specimen which is sent to the hospital clinical laboratory. A medical technologist performs the 82552 assay to quantify CK isoenzymes (CK-MB, CK-BB, CK-MM) as part of an acute coronary syndrome workup. Results are reported to the ordering clinician and integrated with ECG findings, troponin results, and clinical assessment to guide triage and management. Typical sites of service include hospital inpatient wards, emergency departments, and outpatient laboratories. The service type is clinical laboratory testing (chemistry/enzymology).
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when billing only the professional interpretation/consultative component if applicable to any ancillary reporting of results by a physician. |
TC | Technical component |