LOINC Code 79817-3: Left retina Foveal thickness by OCT

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 Foveal thickness. It is commonly used with the system or sample type Retina.left.

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: OCT

What it does not mean

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

Key facts

• Left retina Foveal thickness by OCT
• Foveal thickness
• This term was developed in collaboration with the National Institute of Health's National Eye Institute (NEI) as part of an effort to standardize the data elements collected by the National Ophthalmic Disease Genotyping and Phenotyping Network (eyeGENE).
• EYE; EYE.OCT; EYE.OCT.NEI; L; L ret; Length; LT; Ophthalmology; Ophtho; Ophthy; Optical Coherence Tomography; Point in time; QNT; Quan; Quant; Quantitative; Random; Thick

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