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Domain

Clinical

EHR, ICD-10, LOINC, SNOMED CT, patient care and clinical documentation

16,027 clinical terms

Licensed Practical NurseLPN

A state-licensed nursing professional designated as LPN in provider taxonomy data, EHR credentialing records, and claims systems. LPN NPI records are classified under specific NUCC taxonomy codes and are used in workforce analytics, provider enrollment data, and care team attribution logic within health plan and EHR platforms.

Loading Doseload_dose

A higher-than-maintenance initial dose administered to rapidly achieve therapeutic drug concentrations in a patient. Captured in EHR medication administration records and pharmacy dispensing systems, load_dose values are critical for PK/PD modeling, drug utilization review, and medication safety analytics in clinical data platforms.

Logical Observation Identifiers Names and CodesLOINC

Universal coding standard maintained by Regenstrief Institute used in EHR, lab, and HIE systems to standardize clinical observations, lab results, and measurements. LOINC codes are required in HL7 FHIR, CDA documents, and CMS interoperability mandates for clinical data exchange.

Lumbar PunctureLP

A minimally invasive procedure involving needle insertion into the lumbar subarachnoid space to collect cerebrospinal fluid for diagnostic testing. Coded with CPT and ICD-10-PCS codes in EHR and claims systems, LP procedure data supports neurology analytics, infection disease reporting, and inpatient utilization management.

Magnetic Resonance ImagingMRI

A non-ionizing diagnostic imaging modality using magnetic fields and radio waves to produce detailed anatomical images. In EHR, radiology information systems, and claims data, MRI procedures are captured via CPT codes and DICOM metadata to support radiology workflow analytics, prior authorization, and utilization management reporting.

Maintenance Dosemaint_dose

The ongoing dose administered after a loading dose to sustain therapeutic drug levels within the desired concentration range. Stored in EHR medication records and PBM dispensing data, maint_dose values are used in drug utilization review, adherence analytics, chronic disease management programs, and clinical decision support systems.

Maximum Daily DoseMDD

The highest allowable dose of a medication that can be administered within a 24-hour period, as defined by clinical guidelines or drug labeling. Used in EHR clinical decision support, pharmacy benefit management systems, and utilization management platforms to trigger dosage alerts and prevent adverse drug events during order entry and claims adjudication.

Mean Corpuscular VolumeMCV

A lab result value measuring average red blood cell size in femtoliters, transmitted via HL7 or FHIR Observation resources from laboratory information systems to EHRs. Used in clinical decision support rules to flag anemia types, with reference ranges typically stored in lab result master tables.

Measles Mumps RubellaMMR

A combination vaccine recorded in immunization registries and EHR immunization modules using CVX code 03. Tracked in state immunization information systems and member health records to verify childhood vaccination compliance, with administration dates used in quality measure calculations such as HEDIS Childhood Immunization Status.

Mechanism of InjuryMOI

Coded descriptor of how a traumatic injury occurred, captured via ICD-10-CM external cause codes (V00–Y99) in claims and EHR encounter data. Values such as fall, motor vehicle crash, assault, or gunshot inform injury severity scoring, trauma registry workflows, and predictive risk models in clinical analytics platforms.

Medicare Access and CHIP Reauthorization ActMACRA

Federal legislation enacted in 2015 replacing the Medicare Sustainable Growth Rate formula with the Quality Payment Program, introducing MIPS and APM tracks. Drives provider performance data collection, quality measure reporting pipelines, and payment adjustment calculations stored in CMS and payer analytics data warehouses.

Medication Adherencemed_adhrn

A quantitative measure of how consistently a patient fills and takes prescribed medications, calculated using pharmacy claims data in PBM and EHR systems via metrics such as Proportion of Days Covered (PDC) or Medication Possession Ratio (MPR). Used in HEDIS quality measures and chronic disease management population health programs.

Medication Administration RecordMAR

A structured clinical record within EHR inpatient modules documenting each medication dose administered to a hospitalized patient, including drug name, dose, route, time, and administering nurse. MAR data is used in medication reconciliation workflows, adverse drug event detection algorithms, and nursing quality reporting within hospital information systems.

Medication AppApp

A digital application used by patients or clinicians to manage medication schedules, track adherence, request refills, or receive drug information. Data generated by medication apps may integrate with EHR and PBM systems via FHIR APIs to support medication reconciliation, adherence monitoring, and population health management workflows.

Medication Compliancemed_cmplnc

A measure of a patient's adherence to a prescribed medication regimen, calculated in PBM and EHR systems using metrics such as Proportion of Days Covered (PDC) or Medication Possession Ratio (MPR). Critical for HEDIS quality reporting, chronic disease management programs, and Star Ratings performance tracking.

Medication Discrepancymed_dscrpnc

A mismatch between a patient's documented medication list across EHR, pharmacy, PBM, or claims records, including differences in drug name, dose, frequency, or prescriber. Critical for medication reconciliation workflows during care transitions, admissions, and discharge processing in clinical data systems.

Medication ErrorME

Any preventable event in EHR, pharmacy, or clinical data systems that results in inappropriate medication use or patient harm, including wrong drug, dose, route, or timing. Tracked via incident reporting systems and pharmacy claims data to support quality improvement, compliance, and patient safety analytics.

Medication FreezerFreezer

A temperature-controlled storage unit used in pharmacy and clinical settings to preserve biologics, vaccines, and other temperature-sensitive drugs. In healthcare data systems, freezer unit assignments and temperature logs are tracked for regulatory compliance, cold chain integrity, and drug inventory management within EHR and pharmacy platforms.

Medication Guidemed_gd

An FDA-mandated patient handout documenting significant risks, contraindications, and safe use instructions for specific drugs, referenced in EHR and pharmacy dispensing systems. Data engineers use medication guide identifiers linked to NDC codes to ensure compliant dispensing records and patient safety documentation in pharmacy data pipelines.

Medication Nonadherencemed_non_adhrn

A condition documented in EHR, pharmacy, and PBM data systems where a patient fails to take medications as prescribed, identified through gaps in pharmacy claims, low proportion of days covered metrics, or clinical documentation. Used in population health analytics, care management programs, and quality measure reporting to improve patient outcomes.

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