Test Name: B-Type Natriuretic Peptide
CPT Code: 83880
Alternative Names: BNP
Turnaround Time: Same Day / 24 Hours

• Preferred Specimen: Plasma 
• Collection Tube: Lavender Top (EDTA) 
• Recommended Volume: 2.0 mL
   

• Gently invert tube 8–10 times after collection 
• Transport promptly to laboratory
   

• Transport Temperature: Refrigerated (2–8 °C) preferred 
• Stability: Up to 24 hours 
• Frozen: ❌ Unacceptable
   

• Diagnosis and management of heart failure 
• Assessment of ventricular dysfunction
   

Test Name: C-Reactive Protein, High Sensitivity
CPT Code: 86141
Alternative Names: hs-CRP, Ultra-Sensitive CRP
Turnaround Time: 24–48 Hours

• Specimen: Serum or Plasma 
• Collection Tube: SST or Lavender Top (EDTA)
   

• No special preparation required
   

• Assessment of low-grade inflammation 
• Cardiovascular risk stratification
   

Test Name: Homocysteine
CPT Code: 83090
Turnaround Time: 24–48 Hours

• Specimen: Plasma preferred 
• Collection Tube: Lavender Top (EDTA)
   

• Place specimen on ice immediately after collection 
• Separate plasma promptly
   

• Cardiovascular risk assessment 
• Evaluation of vitamin B12, B6, or folate deficiency
   

Test Name: Lipase
CPT Code: 83690
Turnaround Time: Same Day / 24 Hours

• Specimen: Serum 
• Collection Tube: SST
   

• Diagnosis of acute pancreatitis 
• Monitoring pancreatic function
   

Test Name: Amylase
CPT Code: 82150
Turnaround Time: Same Day / 24 Hours

• Specimen: Serum 
• Collection Tube: SST
   

• Evaluation of pancreatic and salivary gland disorders
   

Test Name: Lipase & Amylase
CPT Codes: 83690 / 82150
Turnaround Time: Same Day / 24 Hours

• Lipase 
• Amylase
   

• Specimen: Serum 
• Collection Tube: SST
   

• Comprehensive assessment of pancreatic injury or inflammation