LOINC Code 21939-4: Surgical margins cancer involvement
21939-4 is a LOINC code used to identify Surgical margins cancer involvement 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 Surgical margins cancer involvement. 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 Surgical margins cancer involvement. 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
- Surgical margins cancer involvement
- Codes describe the final status of surgical margins after resection of the primary tumor. See also RX Summ--Surg Prim Site [1290]. This item serves as a quality measure for pathology reports, is used for staging, and may be a prognostic factor in recurrence. This item is not limited to cases that have been staged. It applies to all cases that have a surgical procedure of the primary site... NAACCR Data Standards and Data Dictionary Version 11
- CA; Misc; Miscellaneous; Nominal; Oncology; Other; Point in time; Random; Spec; Surg; Surg margins cancer invol; 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.