20640-9
LOINC Code
| LOINC code | 20640-9 | ||
|---|---|---|---|
| name | |||
| description | Genetic metabolic specialist (from Canada) point out that plasma may be the traditional sample of choice, but they see no clinically significant difference between plasma and serum amino acids. | ||
| status | ACTIVE | ||
Fully-Specified Name | |||
| component | Citrulline | ||
| property | SCnc = Substance Concentration | ||
| time | Pt = Point in time: To identify measures at a point in time. This is a synonym for “spot” or “random” as applied to urine measurements. | ||
| system | Ser/Plas Ser = Serum Plas = Plasma | ||
| scale | Qn = Quantitative: The result of the test is a numeric value that relates to a continuous numeric scale. Reported either as an integer, a ratio, a real number, or a range. The test result value may optionally contain a relational operator from the set {<=, <, >, >=}. Valid values for a quantitative test are of the form "7", "-7", "7.4", "-7.4", "7.8912", "0.125", "<10", "<10.15", ">12000", 1-10, 1:256 | ||
| method | |||
Additional Names | |||
| short name | Chemistry; CIT; Citr; Level; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; Substance concentration; UniversalLabOrders | ||
Basic Attributes | |||
| class | CHEM | ||
| type | 1 Laboratory | ||
| order vs. observation | Citrulline SerP | ||
| example UCUM units | mcmol/dL; mcmol/L; umol/L The Unified Code for Units of Measure (UCUM) is a code system intended to include all units of measures being contemporarily used in international science, engineering, and business (www.unitsofmeasure.org) | ||
Member of these Groups | |||
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Member of these Panels | |||
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History/Usage | |||
| first released | |||
| last updated | 2.73 | ||
| last change type | MIN - change to field other than name | ||
| change reason | umol/L | ||
Related Names | |||
| |||
| hierarchy paths | LOINC Home {component} LP432695-7 Laboratory LP29693-6 Chemistry and Chemistry - challenge LP343631-0 Chemistry - non-challenge LP7786-9 Amino acids LP18033-8 Citrulline LP15504-1 Citrulline | Serum or Plasma | Chemistry - non-challenge LP383841-6 LOINC Home {component} LP432695-7 Laboratory LP29693-6 Chemistry and Chemistry - challenge LP343631-0 Chemistry - non-challenge LP7786-9 Liver function (excluding enzymes) LP31397-0 Citrulline LP15504-1 Citrulline | Serum or Plasma | Chemistry - non-challenge LP383841-6 | ||
Copyright © 2026 Regenstrief Institute, Inc. All Rights Reserved. To the extent included herein, the LOINC table and LOINC codes are copyright © 1995-2026, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. See https://loinc.org/license for the full LOINC copyright and license.
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