LOINC Code 27821-8: Protein S Free Ag actual/normal IA (PPP) [Relative mass conc]

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 Protein S.free Ag actual/Normal. It is commonly used with the system or sample type PPP.

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: IA

What it does not mean

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

Key facts

• Protein S Free Ag actual/normal in Platelet poor plasma by Immunoassay
• Protein S.free Ag actual/Normal
• Act/Nor; Ag Act/Nor; Antigen; Antigens; COAGULATION; Control; EIA; ELFA; ELISA; Enzyme immunoassay; FR; Hematology; Heme; IAA; MEIA; Non-protein bound; Plas; Platelet poor plasma; Point in time; PR; Prot; Prot S; Prot S Free; PS; QNT; Quan; Quant; Quantitative; Random; Relative mass concentration; RLMCNC; S prime; SUDS; UniversalLabOrders

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