LOINC Code 21970-9: 2nd course treatment start date 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 2nd course treatment start date. 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

• 2nd course treatment start date Cancer Rx
• 2nd course treatment start date
• Date of initiation of second-course treatment. Central registries currently collecting this data item should follow the 1998 ROADS Manual coding instructions. See page 81 for date format... NAACCR Data Standards and Data Dictionary Version 11
• 2nd course Tx; 2nd crs Tx start date; CA; Oncology; Point in time; QNT; Quan; Quant; Quantitative; Random; Second; Started; 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