LOINC Code 42055-4: 4th course Surgery Cancer Rx
42055-4 is a LOINC code used to identify 4th course Surgery Cancer Rx 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 4th course treatment.surgery. It is commonly used with the system or sample type Subsequent cancer Rx.
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 4th course treatment.surgery. It is commonly used with the system or sample type Subsequent cancer Rx.
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
- 4th course Surgery Cancer Rx
- 4th course treatment.surgery
- Codes for the type of primary site surgery given as part of the fourth course of treatment. Central registries currently collecting this data item should follow the 1998 ROADS Manual coding instructions. The codes are the same as those for Surgery of Primary Site, 1998 ROADS Manual, p. 187... NAACCR Data Standards and Data Dictionary Version 11
- 4th course Surg; CA; Identity or presence; Nominal; Oncology; Point in time; Random; Surg; Treatment; TUMOR REGISTRY(NAACCR); Tx
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.