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Creatine Phosphokinase (CPK) | Special Requirement | 1 red top tube | Methodology | Enzymatic | Special Instructions | Collect timed samples at fasting,1 hour,2 hours.Label sample with draw time tube number.Patient should fast for at least 8 hrs.Administer 75 gm Glucola immediately after collecting fasting specimen. | Collection Days | Monday-Friday | Report Available | Daily | CPT Code | 82550 | Reference Range | 35-245 iu/l | Interfering Substance | Hemoglobin, unconjugated bilirubin, lipemia ,adenylated kinase are known to interfere with this methodology. | |