LOINC Code 77990-0: Case class status [CDC.PHIN]

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 Case class status. It is commonly used with the system or sample type ^Event.

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
• Order vs observation: Observation
• Method: CDC.PHIN

What it does not mean

• The code identifies the observation or test, not the actual result.

Key facts

• Case class status [CDC.PHIN]
• Case class status
• The case class status as originally defined by the National Electronic Telecommunications System for Surveillance (NETSS), a computerized public health surveillance information system that provided CDC with weekly data regarding nationally notifiable diseases. CDC is now using the National Electronic Disease Surveillance System (NEDSS).
• Centers for Disease Control and Prevention; Centers for Disease Control and Prevention, Public Health Information Network; Nominal; Point in time; Random; Survey; SURVEY.CDC; 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