81631-4

LOINC Code


LOINC code81631-4
name
descriptionThe overall interpretation of methotrexate polyglutamates (MTX-PGs) measurement results in red blood cells. Results are used to guide treatment planning and evaluation for various diseases, including rheumatoid arthritis.
statusACTIVE

Fully-Specified Name

componentMethotrexate polyglutamates
propertyImp  =  Impression/interpretation of study
timePt  =  Point in time:  To identify measures at a point in time. This is a synonym for “spot” or “random” as applied to urine measurements.
systemRBC  =  Erythrocytes
scaleNar  =  Narrative:  Text narrative, such as the description of a microscopic part of a surgical papule test.
method

Additional Names

short nameAmethoperin; Amethopterin; DRUG/TOXICOLOGY; Drugs; Erythrocytes; Impression; Impression/interpretation of study; Impressions; Interp; Interpretation; Methotrexat; Methotrexate polyglutamates; MTX; MTXpg; MTXpgs; MTX-PGs; Narrative; Point in time; RA; Rand

Basic Attributes

classDRUG/TOX
type1  Laboratory
order vs. observationMTX-PGs RBC-Imp

Member of these Panels

81630-6

History/Usage

first released
last updated2.56
last change typeADD  - added

Related Names



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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