LOINCActiveBoth

LOINC Code 100842-4: NASH score Calculated.FAST [Score]

100842-4 is a LOINC code used to identify NASH score Calculated.FAST [Score] 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 Nonalcoholic steatohepatitis score. 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 Nonalcoholic steatohepatitis score. 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: Both
  • Method: Calculated.FAST

What it does not mean

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

Key facts

Nonalcoholic steatohepatitis score in Serum or Plasma Calculated by FAST
Nonalcoholic steatohepatitis score
Fast is a score used by healthcare professionals to aid in the identification of patients with suspicion of NAFLD as being at risk for active fibrotic NASH (NASH+NAS≥4+F≥2). Fast is computed from liver stiffness by US.transient elastography, liver ultrasound attenuation by transient elastography, and AST blood parameter measurement. More information and the formula can be found at https//www.echosens.com/products/fast.
Calc; Calculation; Chemistry; NASH score; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; Scale; Scre; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR

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

NASH score Calculated.FAST [Score]Nonalcoholic steatohepatitis score in Serum or Plasma Calculated by FASTNASH score SerPl Calculated.FASTNonalcoholic steatohepatitis scoreCHEMNonalcoholic steatohepatitis score, BloodScore

Frequently asked questions

Code details

Code100842-4
SystemLOINC
Display nameNASH score Calculated.FAST [Score]
DescriptionNonalcoholic steatohepatitis score
Short nameNASH score SerPl Calculated.FAST
ComponentNonalcoholic steatohepatitis score
PropertyScore
TimingPt
System (specimen)Ser/Plas
ScaleQn
MethodCalculated.FAST
ClassCHEM
Example unitsscore
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.73
Last changed2.73

Consumer names

Nonalcoholic steatohepatitis score, Blood

Part names

Nonalcoholic steatohepatitis scoreScorePtSer/PlasQnCalculated.FASTPoint 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 100842-4 | HealthAssure