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LOINC Code 16264-4: Calcium oxalate monohydrate crystals Infrared spectroscopy Ql (Stone)

16264-4 is a LOINC code used to identify Calcium oxalate monohydrate crystals Infrared spectroscopy Ql (Stone) 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 Calcium oxalate monohydrate crystals. It is commonly used with the system or sample type Calculus.

Reviewed by HealthAssure Clinical TeamUpdated 25 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 Calcium oxalate monohydrate crystals. It is commonly used with the system or sample type Calculus.

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: Infrared spectroscopy

What it does not mean

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

Key facts

  • Calcium oxalate monohydrate crystals [Presence] in Stone by Infrared spectroscopy
  • Calcium oxalate monohydrate crystals
  • Ca; CaC2O4; CaC2O4.H2O; Cal; Calc; Calculi; CaOx; Chemistry; COM; COM Cry; Crys; Cryst; Crystal; Ethanedioate; Ethanedioic acid; Gastro; Gastroenterology; GI; Infared spectoscopy; IR; Kidney; Monohydrt; Nephrology; Ordinal; Oxal; Oxalic acid; Point in time; PR; QL; Qual; Qualitative; Random; Renal; Screen; Stn; Stone; Stones; Whewelite; Whewellite

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

Calcium oxalate monohydrate crystals Infrared spectroscopy Ql (Stone)Calcium oxalate monohydrate crystals [Presence] in Stone by Infrared spectroscopyCOM Cry Stone Ql IRCalcium oxalate monohydrate crystalsCHEMCalcium oxalate monohydrate crystals, StonePrThr

Frequently asked questions

Code details

Code16264-4
SystemLOINC
Display nameCalcium oxalate monohydrate crystals Infrared spectroscopy Ql (Stone)
DescriptionCalcium oxalate monohydrate crystals
Short nameCOM Cry Stone Ql IR
ComponentCalcium oxalate monohydrate crystals
PropertyPrThr
TimingPt
System (specimen)Calculus
ScaleOrd
MethodInfrared spectroscopy
ClassCHEM
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

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

Consumer names

Calcium oxalate monohydrate crystals, Stone

Part names

Calcium oxalate monohydrate crystalsPrThrPtCalculusOrdInfrared spectroscopyPresence or ThresholdPoint in time (spot)Calculus (stone)

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.