Test Directory

Clear All
Test Code
CRTIN
Test Name
Creatine, Serum
CPT Codes
82540
Expected Turnaround Time
3 - 6 days
Clinical Utility
Serum creatine levels may be significantly increased in amyotrophic lateral sclerosis, dermatomyositis, myasthenia gravis, starvation, muscular dystrophies, and trauma. Creatine synthesis is stimulated by methyltestosterone and may also be increased in hyperthyroidism, diabetic acidosis, and puerperium.
Specimen and Container Info

Specimen Type: Serum

 

Collection Container: Red Top, Plain

 

Desired Specimen Volume: 1 mL
Collection Instructions
  1. Collect a red top, plain tube via venipuncture.
Processing and Submission Instructions
  1. Separate serum from cells.
  2. Transfer 1 mL of serum to a LabCorp pp transpak frozen purple tube.
Transport Instructions

Transport to the laboratory frozen. 
Stability Requirements

Frozen

2 months
Causes for Rejection
  • Hemolysis
  • Specimen not frozen
Methodology
Quantitative Enzymatic/Spectrophotometry
Reference Intervals

See patient report.
Reference Lab
Labcorp Of America Holdings
Testing Schedule
Varies
The American Medical Association (AMA) Current Procedural Terminology (CPT) codes published by HNL Lab Medicine are guidelines and are intended for informational purposes only. CPT coding is the exclusive responsibility of the billing entity. View the Terms.
© 2026 HNL Lab Medicine. All rights reserved.