Creatine kinase 210 U/L is considered high. The normal range for creatine kinase is 18.0 to 198.0 U/L. Creatine kinase is found primarily in the cytoplasm and mitochondria, and is an important kinase directly related to intracellular energy operation, muscle contraction, and ATP regeneration. Creatine kinase is most abundant in skeletal, cardiac, and smooth muscle, followed by brain tissue. Pathologic causes of elevated creatine kinase are common in myocardial infarction, viral infections, polymyositis, etc. Physiologic causes are common in prolonged heavy exercise, neonates, etc. Pharmacologic causes are common in oral statins, antipsychotic medications, etc. If you have elevated creatine kinase, you need to go to the hospital and have your doctor evaluate the cause and formulate a treatment plan.