LOINC Code 56058-1: Deprecated PhenX measure - child head circumference
56058-1 is a LOINC code used to identify Deprecated PhenX measure - child head circumference 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 PhenX measure - child head circumference. It is commonly used with the system or sample type ^Patient.
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 PhenX measure - child head circumference. It is commonly used with the system or sample type ^Patient.
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: DEPRECATED
- Method: PhenX
What it does not mean
- The code identifies the observation or test, not the actual result.
Key facts
- Deprecated PhenX measure - child head circumference
- PhenX measure - child head circumference
- Child head circumference is the maximum circumference measurement around the head from frontal bones to the occipital prominence of the back of the head. Head circumference is measured to monitor an infant's head growth to ensure normal skull/brain growth - not too fast (which may indicate macrocephaly or hydrocephalus), or too slow (which may indicate microcephaly or craniosynostosis). Growth measurements encompass the measurement of height, weight, and head circumference.
- Girth; HC; Pan; Panel; PANEL.PHENX; Panl; Pnl; Point in time; Random
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.