LOINCActiveObservation

LOINC Code 51637-7: Plateletcrit (Bld) [Volume fraction]

51637-7 is a LOINC code used to identify Plateletcrit (Bld) [Volume fraction] 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 Plateletcrit. 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 Plateletcrit. 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

  • Plateletcrit [Volume Fraction] in Blood
  • Plateletcrit
  • Blood; HEMATOLOGY/CELL COUNTS; Pct; Percent; Platelet mass; plateletocrit; Point in time; QNT; Quan; Quant; Quantitative; Random; Volfr; Volume fraction; 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

Plateletcrit (Bld) [Volume fraction]Plateletcrit [Volume Fraction] in BloodPlateletcrit VFr BldPlateletcritHEM/BCPlateletcrit, BloodVFr

Frequently asked questions

Code details

Code51637-7
SystemLOINC
Display namePlateletcrit (Bld) [Volume fraction]
DescriptionPlateletcrit
Short namePlateletcrit VFr Bld
ComponentPlateletcrit
PropertyVFr
TimingPt
System (specimen)Bld
ScaleQn
ClassHEM/BC
Example units%
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.24
Last changed2.73

Consumer names

Plateletcrit, Blood

Part names

PlateletcritVFrPtBldQnVolume FractionPoint 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 51637-7 | HealthAssure