Version 2.74

Part Description

LP14071-2   Ammonia
Ammonia (NH3) is produced in the body as a byproduct of the metabolism of amino acids and other compounds, is processed in the liver to form urea which is ultimately eliminated in the urine. Elevated blood concentrations of ammonia are toxic and can lead to brain damage, coma and death. [PMID: 31082083] Testing of ammonia levels is most commonly performed to monitor various diseases and less so for occupational exposure or poisoning. Conditions associated with elevated ammonia include severe liver disease, Reye syndrome, kidney failure, and certain rare genetic diseases. Ammonia levels may also be measured to evaluate the effectiveness of treatment of hepatic encephalopathy.[Lab Tests Online: Ammonia] Source: Regenstrief LOINC

Reference Information

Type Source Reference
Mapping Guidance Regenstrief Help Almost all laboratories name this "ammonia" but given the range of possible human pH, NH3 (ammonia) actually exists in the form of NH4+ (ammonium ion), and some labs might use the more precisea name. Most laboratories report this measurement in molar units, but some do report it as a mass concentration [LOINC: 22763-7]. Plasma is the recommended specimen. Mapper’s Guide for the Top 2000 plus LOINC Laboratory Observations

Fully-Specified Name


Additional Names

Short Name
Ammonia Plas-sCnc
Display Name
Ammonia (P) [Moles/Vol]
Consumer Name Alpha
Ammonia, Blood

Basic Attributes

First Released
Version 1.0l
Last Updated
Version 2.73
Order vs. Observation
Common Test Rank

Member of these Panels

LOINC Long Common Name
100847-3 Gas and ammonia panel - Arterial blood

Member of these Groups

LOINC Group Group Name
LG42811-6 Ammonia|Pt|Plas|17.031 g/mole
LG4629-4 Ammonia|SCnc|Pt|ANYBldSerPl

Language Variants

Tag Language Translation
zh-CN Chinese (China) 氨:物质的量浓度:时间点:血浆:定量型:
Synonyms: Amm;Ammon;NH3;氨水;阿摩尼亚 克分子浓度;克分子浓度(单位体积);摩尔浓度;摩尔浓度(单位体积);物质的量浓度(单位体积) 化学;化学检验项目;化学检验项目类;化学类;化学试验;非刺激耐受型化学检验项目;非刺激耐受型化学检验项目类;非刺激耐受型化学试验;非刺激耐受型化学试验类 可用数量表示的;定量性;数值型;数量型;连续数值型标尺 时刻;随机;随意;瞬间
fr-CA French (Canada) Ammoniac:Concentration de substance:Temps ponctuel:Plasma:Quantitatif:
es-AR Spanish (Argentina) amoníaco:concentración de sustancia:punto en el tiempo:plasma:cuantitativo:
et-EE Estonian (Estonia) Ammoniaak:SCnc:Pt:P:Qn:
Synonyms: Aine kontsentratsioon Juhuslik Kvantitatiivne Plasma
de-DE German (Germany) Ammoniak:Stoffmengenkonzentration:Zeitpunkt:Plasma:Quantitativ:
pt-BR Portuguese (Brazil) Amônia:SCnc:Pt:Qn:Qn:
Synonyms: Amm; Ammon; NH3; Substance concentration; Level; Point in time; Random; Plasma; Pl; Plsm; Quantitative; QNT; Quant; Quan; Chemistry
ko-KR Korean (Korea, Republic Of) 암모니아:물질농도:검사시점:혈장:정량:
es-ES Spanish (Spain) Amonio:Concentración de sustancia:Punto temporal:Plasma:Qn:
it-IT Italian (Italy) Ammoniaca:SCnc:Pt:Plasma:Qn:
Synonyms: Chimica Concentrazione di Sostanza Plasma Punto nel tempo (episodio)
el-GR Greek (Greece) Αμμωνία:Συγκέντρωση ουσίας:Χρονική στιγμή:Πλάσμα:Ποσοτική:
fr-FR French (France) Ammoniaque:Moles/Volume:Ponctuel:Plasma:Numérique:
tr-TR Turkish (Turkey) Amonyak:SubKons:Zmlı:Plaz:Kant:
ru-RU Russian (Russian Federation) Аммиак:МолКонц:ТчкВрм:Плаз:Колич:
Synonyms: Количественный Молярность;Молярная объёмная концентрация Нашатырный спирт Плазма Точка во времени;Момент
nl-NL Dutch (Netherlands) ammoniak:mol/volume:moment:plasma:kwantitatief:
Synonyms: ammoniumhydroxide
fr-BE French (Belgium) Ammoniac:Concentration de substance:Temps ponctuel:Plasma:Quantitatif:
Synonyms: NH3
es-MX Spanish (Mexico) Amoníaco:Concentración de sustancias:Punto temporal:Plasma:Cuantitativo:

Example Units

Unit Source
umol/L Example UCUM Units

LOINC Terminology Service (API) using HL7® FHIR®

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