Guided Notes

Healthcare Codes Every Analyst Uses

ICD-10-CM, ICD-10-PCS, CPT/HCPCS, DRGs, revenue codes, place of service, NDC, LOINC and SNOMED — and how to group codes into analysis categories.

Why codes matter to analysts

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Healthcare data is mostly codes. To answer 'how many heart failure admissions?' you must know: • which diagnosis codes mean heart failure (ICD-10-CM I50.-, I11.0, I13.0…), • which field (principal vs secondary diagnosis), • which encounter type (inpatient vs observation), • and that codes change every year. Most analysis mistakes come from code definitions, not math.

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