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.

LOINCObservation

LOINC Code 66744-4: Heparin/Body weight (Bld) [Mass/Mass]

Name: LOINC Code 66744-4: Heparin/Body weight (Bld) [Mass/Mass]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:46.212Z

66744-4 is a LOINC code used to identify Heparin/Body weight (Bld) [Mass/Mass] 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 Heparin/body weight. It is commonly used with the system or sample type Bld.

Reviewed by HealthAssure Clinical TeamUpdated 21 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 Heparin/body weight. It is commonly used with the system or sample type Bld.

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: DEPRECATED
Order vs observation: Observation

What it does not mean

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

Key facts

Deprecated Heparin/Body weight [Mass/mass] in Blood
Heparin/body weight
Bdy weight; Blood; bod; Bodies; BW; COAGULATION; Hematology; Heme; Hep; Hepar; Heparn; Mass content; Point in time; QNT; Quan; Quant; Quantitative; Random; WB; Whole blood; Wt

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

Heparin/Body weight (Bld) [Mass/Mass]Deprecated Heparin/Body weight [Mass/mass] in BloodDeprecated Heparin/BW Bld-mCntHeparin/body weightCOAGHeparin/Body Weight, BloodMCnt

Frequently asked questions

Code details

Code66744-4

SystemLOINC

Display nameHeparin/Body weight (Bld) [Mass/Mass]

DescriptionHeparin/body weight

Short nameDeprecated Heparin/BW Bld-mCnt

ComponentHeparin/body weight

PropertyMCnt

TimingPt

System (specimen)Bld

ScaleQn

ClassCOAG

Example unitsmg/Kg

StatusDEPRECATED

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.38

Last changed2.82

Consumer names

Heparin/Body Weight, Blood

Part names

Heparin/body weightMCntPtBldQnMass ContentPoint in time (spot)Blood

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.