LOINC Code 11921-4: Gestational age estimated from Femur length on US by Hansmann 1985 method

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 Gestational age. It is commonly used with the system or sample type ^Fetus.

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 FL.Hansmann 1985

What it does not mean

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

Key facts

• Gestational age estimated from Femur length on US by Hansmann 1985 method
• Gestational age
• Table 7.17 in this reference gives predicted mean, 5th and 95th %-ile femur lengths in mm for gestational ages 12 weeks to 40 weeks rather than estimating gestational age from femur length.
• 85; Echography; Est; estimation; Femur Length; Fetal; FL chart; from FL.Hansmann85; GA; Gest; Gestation; Gyn; Gynecology; OB; ObGyn; OBSTERICAL; OBSTERICAL.ULTRASOUND; Obstetrical; Obstetrics; Point in time; predicted; Prenatal; QNT; Quan; Quant; Quantitative; Random; Sonogram; Sonograph; Sonography; ULS; Ultrasound

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