4549-2
LOINC Code
| LOINC code | 4549-2 | ||||||||||||||||||||||||
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| name | |||||||||||||||||||||||||
| description | Changing from the property from Mass fraction to substance fraction has not effect on the meaning when the molecular weight of the numerator and the denominator are the same (for practical purposes). These terms had had a property of MFR in the past and we changed to SFR because we thought the LOINC community preferred SFR for HbA1c. But we mis understood the preference is to use the MFR variant- so we have changed back. | ||||||||||||||||||||||||
| status | ACTIVE | ||||||||||||||||||||||||
Fully-Specified Name | |||||||||||||||||||||||||
| component | Hemoglobin A1c/Hemoglobin.total | ||||||||||||||||||||||||
| property | MFr = Mass Fraction | ||||||||||||||||||||||||
| 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 | Bld = Whole blood | ||||||||||||||||||||||||
| 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 | Electrophoresis | ||||||||||||||||||||||||
Additional Names | |||||||||||||||||||||||||
| short name | Blood; Chemistry; Elec; Elect; Electr; Electro; Electrophhrs; Electrophrs; Elp; Elph; Endocrine; Endocrinology; Ep; GHb; Glycated hemoglobin; Glycohaemogolobin; Glycohemogolobin; Glycosylated hemoglobin; HA1c; Haemoglobin; Hb; HbA1c; Hgb; Hgb A1c; Mass fr | ||||||||||||||||||||||||
Basic Attributes | |||||||||||||||||||||||||
| class | CHEM | ||||||||||||||||||||||||
| type | 1 Laboratory | ||||||||||||||||||||||||
| order vs. observation | HbA1c MFr Bld E | ||||||||||||||||||||||||
| example UCUM units | % 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 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 | % | ||||||||||||||||||||||||
Related Names | |||||||||||||||||||||||||
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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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