94673-1

25-Hydroxyvitamin D3+25-Hydroxyvitamin D2/24,25-dihydroxyvitamin D3+24,25-dihydroxyvitamin D2 [Mass Ratio] in Serum or Plasma

Active

Part Descriptions

LP182450-9 Calcidiol+ercalcidiol
The total of 25-hydroxyvitamin D3 (calcidiol) + 25-hydroxyvitamin D2 (ercalcidiol), which is often reported simply as 25-hydroxyvitamin D, or 25-OH-D. Source: Regenstrief LOINC

LP417253-4 Calcidiol+ercalcidiol/24r-Hydroxycalcidiol+24r-Hydroxyercalcidiol
24,25-dihydroxyvitamin D (24,25 DHD), also known as 24r-Hydroxycalcidiol, is an INactive metabolite produced by alternative hydroxylation of 25 hydroxyvitamin D (25HDN) by the CYP24A1 enzyme. The hydroxylation by CYP24A1 competes with hydroxylation to active form 1,25-dihydroxyvitamin D (1,25 DHD) by the CYP27B1 enzyme, and is an important process that prevents overproduction of 1,25 DHD and resulting vitamin D toxicity. Testing for an elevated ratio of 25HDN to 24,25 DHD can be used to reveal the likely presence of mutations in the CYP24A1 gene PMID: 22648296. Source: Regenstrief LOINC

Fully-Specified Name

Component: Calcidiol+ercalcidiol/24r-Hydroxycalcidiol+24r-Hydroxyercalcidiol
Property: MRto
Time: Pt
System: Ser/Plas
Scale: Qn
Method

Additional Names

Long Common Name: 25-Hydroxyvitamin D3+25-Hydroxyvitamin D2/24,25-dihydroxyvitamin D3+24,25-dihydroxyvitamin D2 [Mass Ratio] in Serum or Plasma
Short Name: 25(OH)D3+25(OH)D2/24,25(OH)2 VitD SerPl
Display Name: 25-hydroxyvitamin D/24,25-dihydroxyvitamin D3+24,25-dihydroxyvitamin D2 [Mass ratio]
Consumer Name Alpha Get Info: 25-hydroxyvitamin D/24,25-dihydroxyvitamin D3+24,25-dihydroxyvitamin D2, Blood

Basic Attributes

Class: CHEM
Type: Laboratory
First Released: Version 2.68
Last Updated: Version 2.68 (ADD)
Order vs. Observation: Both

Member of these Panels

LOINC	Long Common Name
94674-9	25-Hydroxyvitamin D3+25-Hydroxyvitamin D2/24,25-dihydroxyvitamin D3+24,25-dihydroxyvitamin D2 ratio panel in Serum or Plasma

Language Variants Get Info

Tag	Language	Translation
el-GR	Greek (Greece)	Καλσιδιόλη+ερκαλσιδιόλη/24r-υδροξυκαλσιδιόλη+24r-υδροξυερκαλσιδιόλη:MRto:Pt:Ορός/Πλάσμα:Qn: Synonyms: 24r-υδροξυκαλσιδιόλη 24r-υδροξυκαλσιδιόλη+24r-υδροξυερκαλσιδιόλη MRto Ερκαλσιδιόλη Καλσιδιόλη Καλσιδιόλη+ερκαλσιδιόλη Υδροξυκαλσιδιόλη
es-ES	Spanish (Spain)	25-Hidroxivitamina D2+25-Hidroxivitamina D3/24,25-dihidroxivitamina D3+24,25-dihidroxivitamina D2:Relacion de Masa:Punto temporal:Suero o Plasma:Qn: Synonyms: Cuantitativo
es-MX	Spanish (Mexico)	25-hidroxivitamina D3 + 25-hidroxivitamina D2 / 24,25-dihidroxivitamina D3 + 24,25-dihidroxivitamina D2:Relación de masa:Punto temporal:Suero o Plasma:Cuantitativo:
fr-FR	French (France)	25-hydroxycholécalciférol+25-hydroxyergocalciférol/24r-hydroxycholécalciférol+24r-hydroxyergocalciférol:Masse ratio:Ponctuel:Sérum/Plasma:Numérique:
it-IT	Italian (Italy)	25-Idrossivitamina D2+25-Idrossivitamina D3/24r-Idrossicalcidiolo+24r-Idrossicalcidiolo:MRto:Pt:Siero/Plasma:Qn: Synonyms: 24,25-Diidrossivitamina D3+24,25-diidrossivitamina D2 Chimica Plasma Punto nel tempo (episodio) Rapporto di Massa Siero Siero o Plasma
nl-NL	Dutch (Netherlands)	25-hydroxyvitamine D2 + 25-hydroxyvitamine D3/24,25-dihydroxyvitamine D3 + 24,25-dihydroxyvitamine D2:massaverhouding:moment:serum of plasma:kwantitatief: Synonyms: calcidiol + ercalcidiol; vitamine D2 + D3 calcidiol; vitamine D3 ercalcidiol; 25-hydroxycalciferol vitamine D3 + D2
zh-CN	Chinese (China)	钙二醇+羟基钙二醇/24r-羟基钙二醇+24r,25-羟基钙化醇:质量比率:时间点:血清/血浆:定量型: Synonyms: 24(R),25-二羟基维生素 D;24(R),25-二羟基胆维丁;24(R),25-二羟基胆钙化甾醇;24(R),25-二羟基胆钙化醇;24(R),25-二羟基胆骨化醇;24,25-二羟基维生素 D;24,25-二羟基胆维丁;24,25-二羟基胆钙化甾醇;24,25-二羟基胆钙化醇;24,25-二羟基胆骨化醇;24R-OH-钙二醇;维生素 D3 25-OH-维生素 D3;25OH-维生素 D3;25-羟基维生素 D;25-羟基维生素 D3;25-羟基胆维丁;25-羟基胆钙化醇;25-羟基胆骨化醇;25-羟维生素 D;25-羟维生素 D3;25-羟胆维丁;25-羟胆钙化醇;25-羟胆骨化醇;Calciderol;维生素 D 25 羟;维生素 D 25 羟基;骨化二醇 25-羟基钙化醇;25-羟基维生素 D2;25-羟基麦角钙化甾醇;25-羟基麦角钙化醇;25-羟基麦角骨化醇;9,10-断麦角甾-5,7,10(19),22-四烯-3 Beta,25-二醇;9,10-断麦角甾-5,7,10(19),22-四烯-3 β,25-二醇;Ercalcidiol;OH-Vit D2 25-羟维生素 D2+25-羟维生素 D3;25-羟基维生素 D2+25-羟基维生素 D3 OH-钙二醇化学;化学检验项目;化学检验项目类;化学类;化学试验;非刺激耐受型化学检验项目;非刺激耐受型化学检验项目类;非刺激耐受型化学试验;非刺激耐受型化学试验类可用数量表示的;定量性;数值型;数量型;连续数值型标尺时刻;随机;随意;瞬间来自于同一体系的两种分析物的质量之比;质量比血清或血浆

Example Units

Unit	Source
{ratio}	Example UCUM Units

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Copyright © 2025 Regenstrief Institute, Inc. All Rights Reserved. To the extent included herein, the LOINC table and LOINC codes are copyright © Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. See https://loinc.org/license for the full LOINC copyright and license.