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G0121

Colon ca scrn not hi rsk ind

Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk

Code system
HCPCS Level II
Status
Active
Billable
Yes
In effect from
1998-01-01
Request
curl https://api.healthcare.dev/v1/codes/hcpcs/G0121 \
  -H "Authorization: Bearer $HDEV_API_KEY"
200 OK · application/json
{
  "data": {
    "code": "G0121",
    "parent": null,
    "status": "active",
    "system": "hcpcs",
    "display": "Colon ca scrn not hi rsk ind",
    "billable": true,
    "attributes": {
      "betos": "P8D",
      "coverage": "D",
      "action_code": "N",
      "type_of_service": "2",
      "pricing_indicator": "11",
      "action_effective_date": "2024-01-01"
    },
    "description": "Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk",
    "replaced_by": [],
    "effective_end": null,
    "effective_start": "1998-01-01",
    "care_categories": [
      "endoscopy-and-colonoscopy",
      "cancer-screening"
    ],
    "care_category_details": [
      {
        "slug": "endoscopy-and-colonoscopy",
        "name": "Endoscopy and colonoscopy",
        "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 code G0121"
          }
        ],
        "as_of": "2026-10-01T00:00:00.000Z"
      },
      {
        "slug": "cancer-screening",
        "name": "Cancer screening",
        "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 code G0121"
          }
        ],
        "as_of": "2026-10-01T00:00:00.000Z"
      }
    ]
  },
  "meta": {
    "source": "cms-hcpcs",
    "data_version": "2026-10"
  }
}

CMS attributes

G0121 in the HCPCS file

betos
P8D
coverage
D
action code
N
type of service
2
pricing indicator
11
action effective date
2024-01-01

Change history

Lifecycle

G0121 has been in effect since 1998-01-01. 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 G0121 from code or an agent

curl
curl https://api.healthcare.dev/v1/codes/hcpcs/G0121 \
  -H "Authorization: Bearer $HDEV_API_KEY"
MCP prompt
Using the healthcare.dev MCP server, look up HCPCS Level II code G0121. 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.