Integrate with Optum/Change Healthcare medical network APIs for claim submission and real-time status retrieval

Verified steps

1. Register for API access on the Optum/Change Healthcare developer portal; obtain your client ID and client secret for OAuth2; store credentials securely and reference them as YOUR_CLIENT_ID and YOUR_CLIENT_SECRET in configuration
2. Acquire an access token via the OAuth2 client credentials grant by POSTing to the token endpoint with your credentials; tokens are time-limited — implement token refresh logic to re-acquire before expiry rather than waiting for a 401 response
3. For professional claim submission, POST a JSON-formatted 837P payload to the professional claims endpoint; the API accepts a JSON representation that maps to X12 837P loops — populate CLM, SV1, NM1, and diagnosis/procedure segments as JSON fields per the API schema
4. Poll the claim status endpoint using the returned claim reference ID; the API returns structured status including payer claim number, adjudication status, paid amount, and any rejection codes without requiring you to parse raw X12
5. For eligibility queries, POST a JSON eligibility request to the eligibility endpoint mapping to 270 fields; parse the JSON 271 equivalent response for coverage tiers, copays, deductibles, and active status
6. Implement webhook registration if the API supports it for asynchronous claim status updates; otherwise set up a polling schedule aligned with the payer's adjudication cycle