LOINC Code 11851-3: Fetal Head Diameter.occipito-frontal US
11851-3 is a LOINC code used to identify Fetal Head Diameter.occipito-frontal US in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Diameter.occipito-frontal. It is commonly used with the system or sample type Head^Fetus.
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.occipito-frontal. It is commonly used with the system or sample type Head^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.measured
What it does not mean
- The code identifies the observation or test, not the actual result.
Key facts
- Fetal Head Diameter.occipito-frontal US
- Diameter.occipito-frontal
- Distance from frontal to occipital bone measured in same plane as biparietal diameter. Authors vary but seems most reasonable to use outer to outer edge in determining circumference. Measurement used to derive circumference and cephalic index.
- Brain; Cranial; Cranium; DIA; Diam; Echoencephalogram; Echoencephalography; Echography; Fetal; Gyn; Gynecology; Intracranial; Length; OB; ObGyn; OBSTERICAL; OBSTERICAL.ULTRASOUND; Obstetrical; Obstetrics; OFD; Point in time; QNT; Quan; Quant; Quantitative; Random; Skull; Sonogram; Sonograph; Sonography; ULS; Ultrasound; US+Meas
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
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.