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852: Beta-2-Microglobulin, Serum Print View
B2 Microglobulin, Serum NEPH  < 19 years: Call Client Services
>= 19 years: < 2.52 
mg/L 

PRIMARY
1 Serum 1 (0.5) mL   Room Temperature - 5 Day(s)/Refrigerated - 7 Day(s)/Frozen - 30 Day(s)  
ALTERNATE

Beta-2 microglobulin normally passes through the glomerulus into the proximal tubule where much of it is reabsorbed. Serum levels are therefore an index of glomerular function. When impaired, serum levels rise in inverse ratio to glomerular filtration rate. Increased amounts of beta-2-microglobulin are excreted in several renal disorders, e.g., Balkan nephropathy, heavy metal poisoning and renal tubular disease due to therapeutic agents. Serial levels of beta-2-microglobulin in serum and urine are used to evaluate transplant viability and anticipate rejection. Following a successful graft, serum levels decline toward normal. Increasing serum levels provide an early sign of rejection. Elevated levels are also noted in lymphproliferative disorders, neoplasms (malignant and beningn), inflammatory disease, and autoimmune diseases such as systemic lupus erythematosus (SLE) and Sjogren's disease.

Overnight fasting is preferred.

Reject Criteria: Hemolysis; lipemia
Setup Schedule
Monday-Thursday

Reported (Analytical Time)
3 days

CPT Code
82232

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.






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