LOINC Code 55866-8: Free beta HCG (CSF) [Mass/Vol]

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 Choriogonadotropin.beta subunit.free. 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

• Choriogonadotropin.beta subunit free [Mass/volume] in Cerebral spinal fluid
• Choriogonadotropin.beta subunit.free
• B; B HCG; Beta HCG; Beta human chorionic gonadotropin; B-HCG; B-HCG Free; Cerebral spinal fluid; Cerebrospinal Fl; CG; Chemistry; Choriogonadotropin beta chain; Choriogonadotropins total; Chorionic gonadotropin; FR; HCG; Human chorionic gonadotropin; Level; Mass concentration; Non-protein bound; Point in time; QNT; Quan; Quant; Quantitative; Random; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; Tumor marker

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