LOINC Code 50366-4: Prolactin monomeric/Total prolactin [Mass fraction]

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 Prolactin.monomeric/Prolactin.total. 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

What it does not mean

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

Key facts

• Prolactin monomeric/Prolactin.total in Serum or Plasma
• Prolactin.monomeric/Prolactin.total
• Prolactin is measured before and after PEG-treatment of the sample. The PEG treatment precipitates the macroprolactin and leaves the monomeric prolactin in the sample (more or less). The monomeric prolactin (prolactin result after PEG-treatment) is divided by the total prolactin (prolactin result before PEG-tratment) and the result multiplied with 100 yielding the percentage of monomeric prolactin.
• Chemistry; fPRL; Free prolactin; Lactotropic hormone; Lactotropin; Mammatropic hormone; Mammotropin; Mass fraction; mPRL; Percent; Pl; Plasma; Plsm; Point in time; PRL; Prol; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; Tot; Totl

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.

Related SNOMED CT concepts

Related observations and tests

Common synonyms

Frequently asked questions