LOINC Code 21831-3: Unique tumor case ID Cancer
21831-3 is a LOINC code used to identify Unique tumor case ID 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 Unique tumor case ID. 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 Unique tumor case ID. 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
- Unique tumor case ID Cancer
- Unique tumor case ID
- A system-generated number assigned to each tumor. The number should never change even if the tumor sequence is changed or a record (tumor) is deleted. This is a unique number that identifies a specific tumor so data can be linked. "Sequence Number" cannot be used as a link because the number is changed if a report identifies an earlier tumor or if a tumor record is deleted... NAACCR Data Standards and Data Dictionary Version 11
- CA; Ident; Identifier; Intradermal; Misc; Miscellaneous; Nominal; Oncology; Other; Point in time; Random; Spec; To be specified in another part of the message; TUMOR REGISTRY(NAACCR); 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.