# Example: claim code validator

URL: https://docs.healthcare.dev/agents/claim-code-validator

Runs before a claim is submitted: every code must exist, be billable and be active on the date of
service. Uses `as_of` so last year's claims are checked against last year's codes.

```ts
import { HealthcareDev, NotFoundError } from "@healthcare.dev/sdk";

const hdev = new HealthcareDev();
type System = "icd10cm" | "icd10pcs" | "hcpcs";

export async function validateClaimCodes(
  serviceDate: string,
  codes: { system: System; code: string }[],
) {
  return Promise.all(
    codes.map(async ({ system, code }) => {
      try {
        const { data, meta } = await hdev.codes.get(system, code, { as_of: serviceDate });
        const valid = data.billable && data.status === "active";
        return { system, code, valid, display: data.display, version: meta.data_version };
      } catch (err) {
        if (err instanceof NotFoundError)
          return { system, code, valid: false, display: null, version: null };
        throw err;
      }
    }),
  );
}
```

This checks code validity only. It doesn't check medical necessity, coverage or payer edits, and it
isn't coding advice.