L4631

Afo, walk boot type, cus fab

Ankle foot orthosis, walking boot type, varus/valgus correction, rocker bottom, anterior tibial shell, soft interface, custom arch support, plastic or other material, includes straps and closures, custom fabricated

Code system: HCPCS Level II
Status: Active
Billable: Yes
In effect from: 2011-01-01

Request

curl https://api.healthcare.dev/v1/codes/hcpcs/L4631 \
  -H "Authorization: Bearer $HDEV_API_KEY"

200 OK · application/json

{
  "data": {
    "code": "L4631",
    "parent": null,
    "status": "active",
    "system": "hcpcs",
    "display": "Afo, walk boot type, cus fab",
    "billable": true,
    "attributes": {
      "betos": "D1F",
      "coverage": "C",
      "action_code": "N",
      "type_of_service": "P",
      "pricing_indicator": "38",
      "action_effective_date": "2011-01-01"
    },
    "description": "Ankle foot orthosis, walking boot type, varus/valgus correction, rocker bottom, anterior tibial shell, soft interface, custom arch support, plastic or other material, includes straps and closures, custom fabricated",
    "replaced_by": [],
    "effective_end": null,
    "effective_start": "2011-01-01",
    "care_categories": [
      "braces-and-orthotics"
    ],
    "care_category_details": [
      {
        "slug": "braces-and-orthotics",
        "name": "Braces and orthotics",
        "confidence": 0.9,
        "derivation": "source_stated",
        "evidence": [
          {
            "url": "https://www.cms.gov/medicare/coding-billing/healthcare-common-procedure-system/quarterly-update",
            "anchor": "HCPCS Level II range L0100-L4999"
          }
        ],
        "as_of": "2026-10-01T00:00:00.000Z"
      }
    ]
  },
  "meta": {
    "source": "cms-hcpcs",
    "data_version": "2026-10"
  }
}

CMS attributes

L4631 in the HCPCS file

betos: D1F
coverage: C
action code: N
type of service: P
pricing indicator: 38
action effective date: 2011-01-01

Change history

Lifecycle

L4631 has been in effect since 2011-01-01. 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

Look up L4631 from code or an agent

curl

curl https://api.healthcare.dev/v1/codes/hcpcs/L4631 \
  -H "Authorization: Bearer $HDEV_API_KEY"

MCP prompt

Using the healthcare.dev MCP server, look up HCPCS Level II code L4631. Tell me what it covers, whether it is active and since when, and any CMS attributes it has.

Get a free key HCPCS docs Connect the MCP server

Source: CMS, release 2026-10. Public domain (D-series CDT codes excluded). Reference data, not medical or billing advice.