CodeCloud 

Medical coding reference data is large, versioned by year, and shaped differently in every code system: ICD-10-CM has chapters, sections, index and e-index trees, drug and neoplasm tables; ICD-10-PCS has tables and indices; MS-DRG has its own hierarchy; CPT and HCPCS ship code sets, modifiers and new/revised/deleted deltas per year. CodeCloud puts all of it behind one search box and one navigation model.

The API exposes 77 endpoints, most of them parameterised by code year so a 2017 audit and a 2026 lookup are the same request against different data. Alongside the code sets sit the tools coders reach for around them — NCCI edits and the policy manual, physician fee schedule search, modifier and anaesthesia crosswalks, HCPCS-to-NDC mapping, ICD-10-CM to HCC risk model mapping, and LCD coverage lookups.

Authentication supports both local JWT and Azure AD OIDC, with sessions persisted in MongoDB and per-menu API authorization driving what a role can call. Reference datasets are loaded through dedicated import scripts, which keeps the yearly code-set refresh a data operation rather than a deployment.