abcdefghijklmn
opqrstuvwxyz
Test Menu
Test Change Details
Allergy & Immunology
Cardiology & Coagulation
Dermatopathology
Endocrinology
Gastroenterology
Genetics
Hepatology
Infectious Disease
Microbiology
Nephrology
Neurology
Oncology
Pathology
Pediatrics
Rheumatology
Toxicology
Urology
Women's Health
31789: Homocysteine Print View
Homocysteine ENZYMATIC  Male: < 11.4
Female: < 10.4 
umol/L 

PRIMARY
1 Plasma EDTA 1 (0.5) mL   Room Temperature - 4 Day(s)/Refrigerated - 14 Day(s)/Frozen - 6 Month(s)  
ALTERNATE
  Serum 1 (0.5) mL   Room Temperature - 4 Day(s)/Refrigerated - 14 Day(s)/Frozen - 6 Month(s)  
  Plasma Heparinized 1 (0.5) mL   Frozen - 6 Month(s)/Room Temperature - 4 Day(s)/Refrigerated - 14 Day(s)  

An elevated concentration of Homocysteine is an independent risk factor for cardiovascular disease. When used in conjuction with Methylmalonic Acid (MMA), these tests are useful to diagnose and monitor Vitamin B12 (cobalamin) and folic acid deficiency and are often useful in evaluating macrocytosis (an elevated MCV, an erythrocytic index).
Setup Schedule
Tuesday-Saturday

Reported (Analytical Time)
Same day

CPT Code
83090

The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.

Notes
Reject Criteria: Gross hemolysis; unseparated serum or plasma; whole blood specimens; grossly lipemic


Transport temperature: Room temperature






1996 - 2019 Quest Diagnostics Nichols Institute of Valencia
For test information, please call Client Services at 800-421-4449.

San Francisco Web Design & Database