LOINC Code 77991-8: MMWR Week [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 Week counted for Morbidity and Mortality Weekly Report. 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

• MMWR Week [CDC.PHIN]
• Week counted for Morbidity and Mortality Weekly Report
• Morbidity and Mortality Weekly Report (MMWR) week for which case information is to be counted for MMWR publication.
• Centers for Disease Control and Prevention; Centers for Disease Control and Prevention, Public Health Information Network; Cnt; Count; Number; Point in time; QNT; Quan; Quant; Quantitative; Random; Survey; SURVEY.CDC

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