LOINC Code 4525-2: Complement membrane C3b-C4b cofactor protein (WBC) [Entitic number]

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 membrane C3b-C4b cofactor protein. It is commonly used with the system or sample type WBC.

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

• Complement membrane C3b-C4b cofactor protein [Entitic number] in Leukocytes
• Complement membrane C3b-C4b cofactor protein
• Cofact; Comp; Complmt; Entitic; Entitic number; HEMATOLOGY/CELL COUNTS; Leukocytes; MCP C3b-C4b; Point in time; PR; Prot; QNT; Quan; Quant; Quantitative; Random; WBCs; White blood cells

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