LOINCActiveObservation

LOINC Code 1303-7: Reverse ABO group (Bld)

1303-7 is a LOINC code used to identify Reverse ABO group (Bld) 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 Reverse ABO group. 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 Reverse ABO group. 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: ACTIVE
  • Order vs observation: Observation

What it does not mean

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

Key facts

  • Reverse ABO group [Type]
  • Reverse ABO group
  • Blood; BLOOD BANK; Nominal; Point in time; Random; REV; Typ; WB; Whole blood

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

Reverse ABO group (Bld)Reverse ABO group [Type]Reverse ABO Group BldReverse ABO groupBLDBKReverse ABO Group, BloodType

Frequently asked questions

Code details

Code1303-7
SystemLOINC
Display nameReverse ABO group (Bld)
DescriptionReverse ABO group
Short nameReverse ABO Group Bld
ComponentReverse ABO group
PropertyType
TimingPt
System (specimen)Bld
ScaleNom
ClassBLDBK
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0
Last changed2.73

Consumer names

Reverse ABO Group, Blood

Part names

Reverse ABO groupTypePtBldNomPoint 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.

LOINC Code 1303-7 | HealthAssure