ICD-10-CM
US diagnosis codes from CMS and CDC NCHS, with billable flags, hierarchy and full history.
Version fy2027Updated 2026-10-24Fresh
| Source | CMS and CDC NCHS (cms.gov) |
| Source id | cms-icd10 |
| Release cadence | Yearly (October 1), with occasional April updates |
| License | Public domain (US government work) |
| Endpoints | /v1/codes/icd10cm/{code}, search, hierarchy, batch |
ICD-10-CM is the US clinical modification of ICD-10, used for diagnoses on claims. Codes are
returned with or without the dot (E11.9 and E119 both work).
Fields
| Field | Meaning |
|---|---|
code | The code with its dot, e.g. E11.9 |
display | Short description |
description | Long description |
billable | true for codes valid on a claim, false for headers (E11) |
parent | The next code up the hierarchy |
status, effective_start, effective_end, replaced_by | Lifecycle across releases |
Example
curl https://api.healthcare.dev/v1/codes/icd10cm/E11.22/hierarchy \
-H "Authorization: Bearer $HDEV_API_KEY"