LOINCActiveObservation

LOINC Code 99721-3: Return pressure Renal replacement therapy circuit

99721-3 is a LOINC code used to identify Return pressure Renal replacement therapy circuit 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 Return pressure. It is commonly used with the system or sample type Renal replacement therapy circuit.

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 Return pressure. It is commonly used with the system or sample type Renal replacement therapy circuit.

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

  • Return pressure Renal replacement therapy circuit
  • Return pressure
  • CLIN; Kidney; Point in time; Pressure; QNT; Quan; Quant; Quantitative; Random; RRT circuit

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

Return pressure Renal replacement therapy circuitReturn pressure RRT circuitReturn pressureCLINPresPtRenal replacement therapy circuit

Frequently asked questions

Code details

Code99721-3
SystemLOINC
Display nameReturn pressure Renal replacement therapy circuit
DescriptionReturn pressure
Short nameReturn pressure RRT circuit
ComponentReturn pressure
PropertyPres
TimingPt
System (specimen)Renal replacement therapy circuit
ScaleQn
ClassCLIN
Example unitsmm Hg
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.72
Last changed2.72

Consumer names

Return pressure

Part names

Return pressurePresPtRenal replacement therapy circuitQnPressurePoint in time (spot)

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 99721-3 | HealthAssure