Section 01
ICD-10-CM: diagnosis coding
Used across settings to report why the patient was seen. CMS and CDC/NCHS publish the US clinical modification. Laterality and encounter characters often decide specificity.
Section 02
ICD-10-PCS: inpatient procedures
Facility inpatient procedure coding uses a seven-character PCS code built from tables (section, body system, root operation, and so on). It is not CPT and not what most clinic billers assign on a CMS-1500.
What Health Coder pages cover today
Public product pages emphasize ICD-10-CM plus CPT/HCPCS. Inpatient PCS deployments should be scoped in a demo rather than assumed from a clinic landing page.