LOINC Code 33034-0: CD45 negative events (Specimen) [#]

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 CD45 negative events. It is commonly used with the system or sample type XXX.

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: Observation

What it does not mean

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

Key facts

• CD45 negative events [#] in Specimen
• CD45 negative events
• This is used as a control for stem cell counts and reported with the C34 values
• B220; CD45 neg events; CD45R; CD45RA; CD45RB; CD45RC; CD45RO; CELL MARKERS; Cnt; Count; LCA; Leukocyte common antigen; Ly5; Misc; Miscellaneous; NEG; Number; Other; Point in time; QNT; Quan; Quant; Quantitative; Random; Spec; T200; To be specified in another part of the message; Unspecified

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