LOINCActiveObservation

LOINC Code 70103-7: Methotrexate 6th specimen [Moles/Vol]

70103-7 is a LOINC code used to identify Methotrexate 6th specimen [Moles/Vol] 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 Methotrexate^6th specimen. It is commonly used with the system or sample type Ser/Plas.

Reviewed by HealthAssure Clinical TeamUpdated 21 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 Methotrexate^6th specimen. It is commonly used with the system or sample type Ser/Plas.

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

What it does not mean

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

Key facts

  • Methotrexate [Moles/volume] in Serum or Plasma --6th specimen
  • Methotrexate^6th specimen
  • Amethoperin; Amethopterin; DRUG/TOXICOLOGY; Drugs; Level; Methotrexat; MTX; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; sp6; Spec; SR; Substance concentration

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

Methotrexate 6th specimen [Moles/Vol]Methotrexate [Moles/volume] in Serum or Plasma --6th specimenMTX sp6 SerPl-sCncMethotrexate^6th specimenDRUG/TOXMethotrexate specimen 6, BloodSCnc

Frequently asked questions

Code details

Code70103-7
SystemLOINC
Display nameMethotrexate 6th specimen [Moles/Vol]
DescriptionMethotrexate^6th specimen
Short nameMTX sp6 SerPl-sCnc
ComponentMethotrexate^6th specimen
PropertySCnc
TimingPt
System (specimen)Ser/Plas
ScaleQn
ClassDRUG/TOX
Example unitsumol/L
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.40
Last changed2.70

Consumer names

Methotrexate specimen 6, Blood

Part names

Methotrexate^6th specimenSCncPtSer/PlasQnSubstance ConcentrationPoint in time (spot)Serum or Plasma

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.

LOINC Code 70103-7 | HealthAssure