LOINC Code 74520-8: Complement alternate pathway AH50 actual/normal IA (S) [Rel units/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 Complement alternate pathway AH50 actual/normal. It is commonly used with the system or sample type Ser.

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

• Complement alternate pathway AH50 actual/normal in Serum by Immunoassay
• Complement alternate pathway AH50 actual/normal
• Act/Nor; AP; APH50; Comp; Complement alternative pathway; Complement total alternate pathway AH50; Complmt; Control; EIA; ELFA; ELISA; Enzyme immunoassay; HEMATOLOGY/CELL COUNTS; IAA; MEIA; Point in time; QNT; Quan; Quant; Quantitative; Random; RlACnc; Serum; SR; 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