LOINC Code 30905-4: Cobalamin (Vitamin B12) post cyanocobalamin post dose cyanocobalamin+intrinsic factor/Cobalamins (24H U) [Ratio]

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 Cobalamins^post dose cyanocobalamin+intrinsic factor/Cobalamins^post cyanocobalamin. It is commonly used with the system or sample type Urine.

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: Observation

What it does not mean

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

Key facts

• Cobalamin (Vitamin B12) [Ratio] in 24 hour Urine --post dose cyanocobalamin+intrinsic factor/post dose cyanocobalamin
• Cobalamins^post dose cyanocobalamin+intrinsic factor/Cobalamins^post cyanocobalamin
• 1 day; 24 hours; 24HR; Absorbing intrinsic; After; c133; C721; Cbl; CHEMISTRY.CHALLENGE TESTING; CN-Cbl; Cobalamin; Fac; Fact; IF; p B12; p B12+IF; p dose; PST; QNT; Quan; Quant; Quantitative; Ratios; Rto; Schilling test; Schillings test; UA; UR; Urn; Vit B12; Vitamin B12

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