LOINC Code 98485-6: Amyloid beta 42 peptide/Amyloid beta 40 peptide (CSF) [Mass ratio]

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 Amyloid beta 42 peptide/Amyloid beta 40 peptide. It is commonly used with the system or sample type CSF.

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

What it does not mean

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

Key facts

• Amyloid beta 42 peptide/Amyloid beta 40 peptide [Mass Ratio] in Cerebral spinal fluid
• Amyloid beta 42 peptide/Amyloid beta 40 peptide
• Ab40 peptide; Ab42 peptide; Abeta; Abeta 40; Abeta 42; ABeta 42/40; AL beta40; AL beta42; Alzheimer disease; Alzheimer's disease; B; Beta-amyloid; Cerebral spinal fluid; Cerebrospinal Fl; Chemistry; Mass concentration ratio; Mass ratio; MCRto; Neuro; Neurology; Pept; Point in time; QNT; Quan; Quant; Quantitative; Random; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid

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

Frequently asked questions