Coding System
| Clinical fact | Coding system |
|---|---|
| Demographics | Health Level Seven (HL7), version 3 (administrative standards) |
| Diagnoses | The International Classification of Diseases, Ninth and 10th Revisions, Clinical Modification (ICD-9-CM and ICD-10-CM)a AND Chronic Condition Indicator |
| Procedures | The International Classification of Diseases, Procedural Classification System, Ninth and 10th Revision, OR Healthcare Common Procedure Coding System |
| Medications | RxNorm |
| Laboratory test results, vital signs, and findings | Logical observation identifiers names and codes (LOINC)b |
a
If an HCO provides data in ICD-9-CM, a 9–to–10-CM mapping based on general equivalence mappings (GEM) plus custom algorithms and curation to transform data from ICD-9-CM to ICD-10-CM.
b
To ease finding and using common laboratory test values, LOINC codes are combined up to the clinically significant level for most frequent laboratory values and coded as TNX: LAB.