LOINC Code 21845-3: Source of information Usual occupational Hx
21845-3 is a LOINC code used to identify Source of information Usual occupational Hx 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 Information source. It is commonly used with the system or sample type Usual occupation Hx.
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 Information source. It is commonly used with the system or sample type Usual occupation Hx.
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
- Method: *
What it does not mean
- The code identifies the observation or test, not the actual result.
Key facts
- Source of information Usual occupational Hx
- Information source
- Code that best describes the source of occupation information provided on this patient. This is a central cancer registry data item (i.e., codes should be applied by a central or regional registry rather than collected from reporting facilities). Occupation information may come from a variety of sources. The most valid and reliable source of occupation information for patients has not yet been determined... NAACCR Data Standards and Data Dictionary Version 11
- Nominal; Oncology; Point in time; Random; Source of info; Srce; TUMOR REGISTRY(NAACCR); Typ
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.