LOINC Code 94674-9: 25-hydroxyvitamin D/24,25-dihydroxyvitamin D3+24,25-dihydroxyvitamin D2 ratio panel

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Calcidiol+ercalcidiol/24r-Hydroxycalcidiol+24r-Hydroxyercalcidiol ratio panel. It is commonly used with the system or sample type Ser/Plas.

When is it used?

• Used in lab systems, EHRs, and clinical data exchange.
• May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
• Status: ACTIVE
• Order vs observation: Order
• Panel type: Panel

What it does not mean

• The code identifies the observation or test, not the actual result.

Key facts

• 25-Hydroxyvitamin D3+25-Hydroxyvitamin D2/24,25-dihydroxyvitamin D3+24,25-dihydroxyvitamin D2 ratio panel in Serum or Plasma
• Calcidiol+ercalcidiol/24r-Hydroxycalcidiol+24r-Hydroxyercalcidiol ratio panel
• 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. CYP24A1 converts 25 hydroxyvitamin D to 24,25 dihydroxyvitamin D, a process thought to prevent overproduction of the active metabolite 1,25 dihydroxyvitamin D.
• 24(R),25-dihydroxycholecalciferol; 24,25(OH)2 VitD; 24,25(OH)2 VitD Pnl; 24,25-dihydroxy cholecalciferol; 24,25-dihydroxy vitamin D; 24,25-Dihydroxyvitamin D; 24,25-Dihydroxyvitamin D2 +24,25-Dihydroxyvitamin D3; 24r-Hydroxy calcidiol; 24R-OH-Calcidiol; 25 Hydroxyvitamin D 2; 25 Hydroxyvitamin D2; 25(OH)D2; 25(OH)D3; 25(OH)D3+25(OH)D2; 25D3+25D2/24,25D3+24,25D2; 25D3+25D2/24,25D3+24,25D2 Pnl; 25-Hydroxy calciferol; 25-Hydroxy Vit D total; 25-Hydroxycalciferol; 25-hydroxycholecalciferol; 25-Hydroxyergocalciferol; 25-hydroxyvitamin D; 25-Hydroxyvitamin D 2; 25-hydroxyvitamin D 3; 25-Hydroxyvitamin D2; 25-Hydroxyvitamin D2+25-Hydroxyvitamin D3/24,25 Dihydroxyvitamin D; 25-Hydroxyvitamin D2+25-Hydroxyvitamin D3/24,25 Dihydroxyvitamin D2+24,25 Dihydroxyvitamin D3; 25-Hydroxyvitamin D2+25-Hydroxyvitamin D3/24,25-Dihydroxyvitamin D ratio panel; 25-hydroxyvitamin D3; 9,10-Secoergosta-5,7,10(19),22-tetraene-3 beta,25-diol; Calciderol; Calcidiol+Calciferol; Calcidiol+Ercalcidiol; Calcifediol; Chemistry; CYP24A1 gene; Ercalcidiol; Ercalcidiol+calcidiol/24r-Hydroxycalcidiol; Ercalcidiol+calcidiol/24r-Hydroxycalcidiol Ratio Panel; Hydroxy calcidiol; Hypercalcemia; OH-Calcidiol; Pan; PANEL.CHEMISTRY; Panl; Pl; Plasma; Plsm; Pnl; Point in time; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; Vitamin D 25 hydroxy

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

Frequently asked questions