Change Healthcare Medical Network API

JSON-over-REST front end to the HIPAA X12 EDI transaction set — 270/271 eligibility, 276/277 claim status, 837P/837I claim submission and validation, 835/277 claims responses and reports, 278 prior authorization and referrals, claim attachments, and the payer list. OAuth 2.0 client credentials against apip/auth/v2/token, one-hour bearer tokens, versioning carried in the URL path.