Thank you for your patience while we transitioned to our upgraded systems. We continue to work through the backlog of orders, demographic changes, and other requests created during the downtime. Our priority is to resolve the backlog as quickly as possible. We appreciate your understanding and continued support.
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ACCURACY-BASED VITAMIN D - ABVD
ABVD
Analytes/procedures in bold type are regulated for proficiency testing by the Centers for Medicare & Medicaid Services (CMS).
Analyte
Challenges per Shipment
Number of Shipments
25‑OH vitamin D (D2 and D3)
3
Two shipments per year
Calcium
3
Additional Information
The Centers for Disease Control and Prevention (CDC) will establish reference targets using isotope-dilution LC-MS/MS method.
Specimens are collected by a modified application of Clinical and Laboratory Standards Institute Guideline CLSI C37-A, Preparation and Validation of Commutable Frozen Human Serum Pools as Secondary Reference Materials for Cholesterol Measurement Procedures; Approved Guideline.
Program Information
Three 1.0‑mL liquid human serum specimens
Serum is from multi-donor endogenous pools.
Conventional and International System of Units (SI) reporting offered
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