LOINC Code 9813-7: Cortisol AM peak specimen [Mass/Vol]

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 Cortisol^AM peak specimen. It is commonly used with the system or sample type Ser/Plas.

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: Both

What it does not mean

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

Key facts

• Cortisol [Mass/volume] in Serum or Plasma --AM peak specimen
• Cortisol^AM peak specimen
• Identifies a morning specimen when cortisol is at its highest point in a circadian cycle - often considered to be 8AM. Some laboratories will call this "8AM" specimen, but specimens in the range of 7AM to 9AM are acceptable. The peak time may have to be adjusted for patients on night or evening shifts because their circadian rhythms can shift with their sleeping time.
• 17-Hydroxycorticosterone; 8 AM; 8AM; AM diurnal peak; Chemistry; circadian high; Compound F; Coritsol; Cort; F; hydrocortisone; Level; Mass concentration; Morning; Pl; Plasma; Plsm; Point in time; Post; Postdose; Post-dose; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; Spec; SR; UniversalLabOrders

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