What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveBoth

LOINC Code 72157-1: Apo-transcobalamin II (S) [Moles/Vol]

Name: LOINC Code 72157-1: Apo-transcobalamin II (S) [Moles/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

72157-1 is a LOINC code used to identify Apo-transcobalamin II (S) [Moles/Vol] in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Apo-transcobalamin II. It is commonly used with the system or sample type Ser.

Reviewed by HealthAssure Clinical TeamUpdated 25 May 2026

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 Apo-transcobalamin II. It is commonly used with the system or sample type Ser.

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: Both

What it does not mean

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

Key facts

Apo-transcobalamin II [Moles/volume] in Serum
Apo-transcobalamin II
2; Apo-HC-II; apo-TC-I; Apotranscobalamin; Chemistry; Cobalamin; Level; Point in time; QNT; Quan; Quant; Quantitative; Random; Serum; SR; Substance concentration; TC; TC-2; TCII; TC-II; Transcobalamin 1; Transcobalamin 2; transcobalamin I; 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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for Apo-transcobalamin II (S) [Moles/Vol] (72157-1)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Apo-transcobalamin II (S) [Moles/Vol]Apo-transcobalamin II [Moles/volume] in SerumApo-HC-II Ser-sCncApo-transcobalamin IICHEMApo-transcobalamin II, BloodSCnc

Frequently asked questions

Code details

Code72157-1

SystemLOINC

Display nameApo-transcobalamin II (S) [Moles/Vol]

DescriptionApo-transcobalamin II

Short nameApo-HC-II Ser-sCnc

ComponentApo-transcobalamin II

PropertySCnc

TimingPt

System (specimen)Ser

ScaleQn

ClassCHEM

Example unitspmol/L

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.42

Last changed2.42

Consumer names

Apo-transcobalamin II, Blood

Part names

Apo-transcobalamin IISCncPtSerQnSubstance ConcentrationPoint in time (spot)Serum

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.