LOINC Code 21924-6: Tumor marker Cancer
21924-6 is a LOINC code used to identify Tumor marker Cancer in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Tumor marker. It is commonly used with the system or sample type Cancer.XXX.
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 Tumor marker. It is commonly used with the system or sample type Cancer.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
What it does not mean
- The code identifies the observation or test, not the actual result.
Key facts
- Tumor marker Cancer
- Tumor marker
- Records prognostic indicators for specific sites or histologies. COC uses these codes for cases diagnosed 1996 and forward. See the COC ROADS Manual, 1998 Supplement, for a list of specific sites and histologies. For tumors diagnosed before January 1, 1996, Tumor Marker 1 is coded only for estrogen receptor status of breast cancers. For SEER requirements for the specific sites, histologies, and diagnosis years for which this item is coded, see the 1998 SEER Program Code Manual... NAACCR Data Standards and Data Dictionary Version 11
- CA; Mark; Misc; Miscellaneous; Nominal; Oncology; Other; Point in time; Random; Spec; To be specified in another part of the message; TUMOR REGISTRY(NAACCR); Typ; 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
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.