LOINC Code 87557-5: Protein S Ag and protein S Ag.free panel 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 Ag & protein S Ag.free panel. 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: Order
• Panel type: Panel
• Method: IA

What it does not mean

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

Key facts

• Protein S Ag and protein S Ag.free panel - Platelet poor plasma by Immunoassay
• Protein S Ag & protein S Ag.free panel
• This panel contains quantitative results for free & total protein S Ag in human plasma. The test may be order for patients with a history of thrombosis to evaluate for possible protein S deficiency either due to a congenital inherited disorder or an acquired condition, such as liver disease or vitamin K deficiency.
• COAGULATION; EIA; ELFA; ELISA; Enzyme immunoassay; FR; IAA; MEIA; MNSs Blood Group System; Non-protein bound; Pan; PANEL.COAGULATION; Panl; Plas; Platelet poor plasma; Pnl; Point in time; PR; Prot; Prot S; Prot S Ag + Prot S Ag.free Pnl; PS; QNT; Quan; Quant; Quantitative; Random; Relative mass concentration; RLMCNC; S prime; SUDS

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