LOINCActiveObservation

LOINC Code 11811-7: Renal pelvis - right Diameter US

11811-7 is a LOINC code used to identify Renal pelvis - right Diameter US 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 Diameter. It is commonly used with the system or sample type Renal pelvis.right.

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 Diameter. It is commonly used with the system or sample type Renal pelvis.right.

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
  • Method: US.measured

What it does not mean

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

Key facts

  • Renal pelvis - right Diameter US
  • Diameter
  • Longest dimension measured in the plane that contains the longest rostral caudal diameter and, perpendicular to it, the longest pelvis-cortex dimension. Used to quantify degree of hydronephrosis or obstruction.
  • DIA; Diam; Echography; Gyn; Gynecology; Kidney; Length; OB; ObGyn; OBSTERICAL; OBSTERICAL.ULTRASOUND; Obstetrical; Obstetrics; Pelvic; Point in time; QNT; Quan; Quant; Quantitative; R; Random; Renal pelvis-R; RT; Sonogram; Sonograph; Sonography; ULS; Ultrasound; US+Meas

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

Renal pelvis - right Diameter USRenal pelvis-R Diam US.measDiameterOB.USLenPtRenal pelvis.right

Frequently asked questions

Code details

Code11811-7
SystemLOINC
Display nameRenal pelvis - right Diameter US
DescriptionDiameter
Short nameRenal pelvis-R Diam US.meas
ComponentDiameter
PropertyLen
TimingPt
System (specimen)Renal pelvis.right
ScaleQn
MethodUS.measured
ClassOB.US
Example unitscm
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0j-a
Last changed2.48

Part names

DiameterLenPtRenal pelvis.rightQnUS.measuredLengthPoint in time (spot)Renal pelvis RightUltrasound.measured

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 11811-7 | HealthAssure