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Domain

Clinical

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

16,027 clinical terms

Chief ComplaintCC

The primary reason for a patient visit, recorded verbatim in the EHR encounter note and mapped to ICD-10 symptom or diagnosis codes for claims submission. Used in clinical analytics to identify care patterns, triage acuity scoring, and population health management within both ambulatory and inpatient data systems.

Chief Medical OfficerCMO

Senior physician executive responsible for clinical strategy and quality oversight within a health plan, hospital system, or PBM organization. In healthcare data systems, the CMO role governs utilization management policies, clinical decision support rule sets, and quality measure reporting frameworks used in EHR and claims analytics platforms.

Chimeric Antigen Receptor T-cellCAR-T

An advanced immunotherapy treatment involving genetically engineered patient T-cells, billed under specialized HCPCS and ICD-10-PCS codes in hospital claims systems. EHR oncology modules track CAR-T infusion encounters, cytokine release syndrome monitoring, and long-term follow-up data, while payer systems manage complex prior authorization and reimbursement workflows.

ChlorideCl

An electrolyte laboratory test result stored in EHR systems using LOINC code 2075-0, representing serum or plasma chloride concentration measured in mEq/L. Included in the basic and comprehensive metabolic panel claims bundles (CPT 80048, 80053), chloride values are critical inputs for clinical decision support rules governing acid-base disorder and hydration status alerts.

Cholinergiccholinrg

A pharmacological classification describing drugs or physiological responses that mimic or enhance acetylcholine neurotransmitter activity, stored as a drug class attribute in pharmacy formulary databases and EHR medication management systems. PBM drug utilization review engines use cholinergic classifications to generate drug-drug and drug-disease interaction alerts within prescribing workflows.

Chronic Obstructive Pulmonary DiseaseCOPD

A chronic respiratory condition documented in EHR problem lists and claims data using ICD-10 codes J44.0 through J44.9, distinguishing emphysema, chronic bronchitis, and exacerbation severity. COPD diagnosis codes drive risk adjustment models, HEDIS measure calculations, and care management program enrollment in payer and population health data systems.

Clinical Data RepositoryCDR

A centralized, subject-oriented database consolidating structured and unstructured clinical data from EHR, laboratory, pharmacy, and imaging systems into a unified patient record. CDRs serve as the foundational data layer for clinical analytics, real-time decision support, and longitudinal care management platforms, using HL7 FHIR or HL7 v2 interfaces for interoperability across disparate source systems.

Clinical Decision SupportCDS

Rule-based or AI-driven software integrated into EHR and pharmacy systems that delivers real-time alerts, order sets, care gap notifications, and evidence-based recommendations at the point of care. CDS engines reference clinical knowledge bases, patient data, and payer formulary rules to improve care quality, reduce adverse events, and support compliance with quality measure reporting requirements.

Clinical Evaluation ReportCER

A structured document used in medical device regulatory submissions summarizing clinical data supporting device safety and performance. In healthcare data systems, CER documents are tracked in regulatory compliance platforms and linked to device master records in EHR and supply chain systems.

Clinical Note Textclin_note_txt

Unstructured or semi-structured free-text captured by clinicians during patient encounters in EHR systems, including SOAP notes, progress notes, and discharge summaries. Used in NLP pipelines for clinical coding, quality measure extraction, and downstream analytics in platforms like Epic and Cerner.

Clinical Quality MeasureCQM

A standardized, logic-based metric used to assess healthcare quality, patient safety, and clinical effectiveness within EHR and claims systems. CQMs are defined by CMS and reported via eCQM frameworks, HEDIS, or MIPS, driving value-based care analytics and provider performance reporting.

Clinical Statusclin_sts_cd

A coded field in EHR and claims systems representing the current state of a patient diagnosis, such as Active, Relapse, Remission, or Resolved. Stored as clin_sts_cd, this field drives care management workflows, chronic disease tracking, and population health stratification in clinical data warehouses.

Clostridium Difficileclstrd_diff

A healthcare-associated infection (HAI) caused by Clostridioides difficile, tracked in infection surveillance systems, EHR problem lists, and clinical quality reporting platforms. Clostridium difficile rates are reported as CQMs to CMS and used in hospital-acquired condition (HAC) penalty calculations and public health datasets.

Clustered Regularly Interspaced Short Palindromic RepeatsCRISPR

A gene-editing technology increasingly referenced in clinical trial data systems, genomic EHR modules, and precision medicine platforms. CRISPR-related data elements appear in research databases, biobank records, and molecular diagnostic result feeds integrated with EHR systems for rare disease and oncology programs.

Collaborative Practice Agreementcollab_prac

A formal legal agreement between pharmacists and prescribing providers authorizing pharmacists to initiate, modify, or discontinue drug therapy under defined protocols, referenced in pharmacy management systems and EHR credentialing modules. CPA data supports scope-of-practice tracking, MTM program reporting, and state regulatory compliance documentation.

ColonoscopyColo

A colorectal cancer screening and diagnostic procedure tracked in EHR procedure records, claims systems using CPT codes (e.g., 45378), and clinical quality measure reporting platforms. Colonoscopy data is used in preventive care gap analysis, HEDIS colorectal cancer screening measures, and population health outreach programs.

Comprehensive Medication ReviewCMR

A structured clinical pharmacist service documented in PBM and MTM platforms where all patient medications are evaluated for safety, efficacy, and adherence. CMR completion rates are tracked in Medicare Part D Star Ratings data and quality reporting systems.

Computed TomographyCT

A diagnostic imaging procedure recorded in EHR, radiology information systems, and claims data using CPT and HCPCS codes. CT scan orders, results, and associated DICOM metadata are stored in imaging repositories and linked to clinical encounters for care coordination and utilization analysis.

Congestive Heart FailureCHF

A chronic cardiac condition identified in EHR problem lists, claims data, and risk stratification models using ICD-10-CM codes I50.x. CHF diagnoses drive care management program enrollment, HCC risk adjustment scoring, and quality measure calculations in value-based care analytics platforms.

Consolidated Clinical Document ArchitectureC-CDA

An HL7 standard XML-based document framework used in EHR and HIE interoperability workflows to structure clinical documents including CCDs, discharge summaries, and progress notes. C-CDA documents are exchanged via Direct messaging and FHIR pipelines to support care transitions and regulatory reporting requirements.

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