Cpt Code Vitamin D 25 Hydroxy ~ Maurice Bloom Vigor

Cpt Code Vitamin D 25 Hydroxy

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Synonyms

Vitamin D, 25-Hydroxy, LC/MS-MS

Expected Turnaround Time

4 - 10 days

Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.

Specimen Requirements

Specimen

Serum (preferred) or plasma

Volume

Minimum Volume

0.5 mL (Note: This volume does not allow for repeat testing.)

Container

Red-top tube, gel-barrier tube, lavender-top (EDTA) tube, or green-top (heparin) tube

Collection

Serum or plasma must be separated from cells within 45 minutes of venipuncture. Submit serum or plasma in a plastic transport tube.

Storage Instructions

Freeze. Stable frozen for 34 months. Stable at room temperature or refrigerated for seven days.

Test Details

Use

25-Hydroxy vitamin D is used to measure vitamin D status; it includes results for total 25-hydroxy vitamin D₂ and 25-hydroxy vitamin D₃. This 25-hydroxy vitamin D assay and the alternative immunoassay test (Vitamin D, 25-Hydroxy [081950]) are both CDC-certified for accuracy.¹

Methodology

Liquid chromatography/tandem mass spectrometry (LC/MS-MS)

Additional Information

The biological function of vitamin D is to maintain normal levels of calcium and phosphorus absorption. 25-Hydroxy vitamin D is the storage form of vitamin D. Vitamin D assists in maintaining bone health by facilitating calcium absorption. Vitamin D deficiency can also cause osteomalacia, which frequently affects elderly patients. Vitamin D from sunshine on the skin or from dietary intake is converted predominantly by the liver into 25-hydroxy vitamin D, which has a long half-life and is stored in the adipose tissue. The metabolically active form of vitamin D, 1,25-di-hydroxy vitamin D, which has a short life, is then synthesized in the kidney as needed from circulating 25-hydroxy vitamin D. The reference interval of greater than 30 ng/mL is a target value established by the Endocrine Society.²

Footnotes

1. Centers for Disease Control and Prevention (CDC). Laboratory Quality Assurance and Standardization Programs. Standardization of Measurement Procedures. Vitamin D Standardization Certification Program (VDSCP). Atlanta, Ga: CDC;2015. Available at: http://www.cdc.gov/labstandards/hs_standardization.html. Accessed April 12, 2015.

2. Holick MF, Binkley NC, Bischoff-Ferrare HA, et al. Evaluation, treatment, and prevention of vitamin D deficiency: An Endocrine Society clinical practice guideline. J Clin Endocrinol Metab. 2011; 96(7):1911-1930. 21646368

LOINC® Map

Order Code	Order Code Name	Result Code	Result Code Name	UofM	Result LOINC
504115	25-Hydroxyvitamin D LCMS D2+D3	500815	25-Hydroxy, Vitamin D	ng/mL	62292-8
504115	25-Hydroxyvitamin D LCMS D2+D3	500816	25-Hydroxy, Vitamin D-2	ng/mL	49054-0
504115	25-Hydroxyvitamin D LCMS D2+D3	500817	25-Hydroxy, Vitamin D-3	ng/mL	1989-3

CPT Statement/Profile Statement

The LOINC® codes are copyright © 1994-2021, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at https://loinc.org/license/. Additional information regarding LOINC® codes can be found at LOINC.org, including the LOINC Manual, which can be downloaded at LOINC.org/downloads/files/LOINCManual.pdf

Cpt Code Vitamin D 25 Hydroxy

Source: https://www.labcorp.com/tests/504115/25-hydroxy-vitamin-d-d-sub-2-sub-d-sub-3-sub-fractionated-lc-ms-ms

Maurice Bloom Vigor

Cpt Code Vitamin D 25 Hydroxy