LOINC Code 59558-7: Flag for 2nd course treatment start date not populated 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 Flag for 2nd course treatment start date not populated. 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

• Flag for 2nd course treatment start date not populated Cancer Rx
• Flag for 2nd course treatment start date not populated
• This flag explains why there is no appropriate value in the corresponding date field, Subsq RX 2nd Course Date [1660]. This data item was added to Volume II Version 12 (effective January 2010)... NAACCR Data Standards and Data Dictionary Version 12
• 2nd course Tx; 2nd crs Tx start date; CA; Flag for 2nd crs Tx start date; Identity or presence; Nominal; Oncology; Point in time; 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