Special casting material
Special casting material (e.g., fiberglass)
curl https://api.healthcare.dev/v1/codes/hcpcs/A4590 \ -H "Authorization: Bearer $HDEV_API_KEY"
{
"data": {
"code": "A4590",
"parent": null,
"status": "active",
"system": "hcpcs",
"display": "Special casting material",
"billable": true,
"attributes": {
"betos": "D1A",
"coverage": "I",
"action_code": "N",
"type_of_service": "9",
"pricing_indicator": "00",
"action_effective_date": "1984-01-01"
},
"description": "Special casting material (e.g., fiberglass)",
"replaced_by": [],
"effective_end": null,
"effective_start": "1984-01-01",
"care_categories": [
"casts-and-splints"
],
"care_category_details": [
{
"slug": "casts-and-splints",
"name": "Casts and splints",
"confidence": 0.95,
"derivation": "source_stated",
"evidence": [
{
"url": "https://www.cms.gov/medicare/coding-billing/healthcare-common-procedure-system/quarterly-update",
"anchor": "HCPCS Level II range A4580-A4590"
}
],
"as_of": "2026-10-01T00:00:00.000Z"
}
]
},
"meta": {
"source": "cms-hcpcs",
"data_version": "2026-10"
}
}CMS attributes
Change history
A4590 has been in effect since 1984-01-01. This page shows HCPCS Level II release 2026-10.
Add as_of=YYYY-MM-DD to the request to get this code exactly as it was on a past date. The change feed (GET /v1/changes) lists what each release added, changed or retired across the whole dataset; a per-code change list isn't published yet.
Use it
curl https://api.healthcare.dev/v1/codes/hcpcs/A4590 \ -H "Authorization: Bearer $HDEV_API_KEY"
Using the healthcare.dev MCP server, look up HCPCS Level II code A4590. Tell me what it covers, whether it is active and since when, and any CMS attributes it has.
Source: CMS, release 2026-10. Public domain (D-series CDT codes excluded). Reference data, not medical or billing advice.