LOINC Code 78439-7: Phenytoin free and total trough panel
78439-7 is a LOINC code used to identify Phenytoin free and total trough panel 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 Phenytoin free & total trough panel. It is commonly used with the system or sample type Ser/Plas.
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 Phenytoin free & total trough panel. It is commonly used with the system or sample type Ser/Plas.
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: Order
- Panel type: Panel
What it does not mean
- The code identifies the observation or test, not the actual result.
Key facts
- Phenytoin free and total trough panel - Serum or Plasma
- Phenytoin free & total trough panel
- Trough levels of phenytoin free and total are measured for therapeutic drug management in patients with renal failure or conditions that may alter albumin concentrations.
- DI-HYDAN; Dilantin; Dilj; Diphenylhydantoin; DPH; DRUG/TOXICOLOGY; Drugs; Epanutin; Fenantoin; FR; Lehydan; Non-protein bound; Pan; PANEL.DRUG & TOXICOLOGY; Panl; Phenhydan; PHYT; Phyt Free + Total Trough Pnl; Pl; Plasma; Plsm; Pnl; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; Sinergina; SR; Tot; Totl; Zentropil
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.