LOINC Code 33171-0: Gestational sac Diameter estimated from gestational age by method of Rempen 1991 (US)

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 Diameter. It is commonly used with the system or sample type Gestational sac.

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: US.estimated from Rempen 1991

What it does not mean

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

Key facts

• Gestational sac Diameter estimated from gestational age by method of Rempen 1991 (US)
• Diameter
• 91; DIA; Diam; Echography; Est; estimation; from GA.Rempen91; Gest; Gestation; GS; GSD; Gyn; Gynecology; Length; OB; ObGyn; OBSTERICAL; OBSTERICAL.ULTRASOUND; Obstetrical; Obstetrics; Point in time; predicted; Prenatal; QNT; Quan; Quant; Quantitative; Random; Sonogram; Sonograph; Sonography; ULS; Ultrasound; US+est

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