generated: '2026-07-17'
method: derived
source: openapi/andel-data-exchange-openapi.yaml
entities:
- name: Purchase
  id_field: purchase_id
  description: A member purchase event on the Data Exchange (RFC-9457 sibling of a claim, not a regulated-claims feed).
  key_fields: [purchase_id, member_id, plan_id, ndc, prescriber_spi, purchased_at, member_purchase_amount, oop_amount, plan_contribution, status, event_type]
- name: Accumulator
  description: Deductible/out-of-pocket accumulator detail embedded on a purchase.
  key_fields: [type_of_benefit_account, participation_type, cr_db_indicator]
- name: EsiIdentity
  description: Express Scripts (ESI) CDH accumulator-format identity/transmission block embedded on a purchase.
  key_fields: [transmission_type, request_code]
- name: Subscription
  id_field: subscription_id
  description: A webhook subscription for purchase events.
  key_fields: [subscription_id, url, event_types, description]
relationships:
- from: Purchase
  to: Plan
  type: belongs_to
  via: plan_id
- from: Purchase
  to: Member
  type: belongs_to
  via: member_id
- from: Purchase
  to: Subscriber
  type: belongs_to
  via: subscriber_id
- from: Purchase
  to: Prescriber
  type: belongs_to
  via: prescriber_spi
- from: Purchase
  to: Purchase
  type: belongs_to
  via: original_purchase_id
  note: Reversals/adjustments reference the original purchase.
- from: Purchase
  to: Accumulator
  type: has_many
  via: accumulators
- from: Purchase
  to: EsiIdentity
  type: has_one
  via: esi
- from: Subscription
  to: Purchase
  type: has_many
  via: event_types
  note: A subscription delivers purchase.created events.
notes: >-
  Plan, Member, Subscriber, and Prescriber are referenced by id/SPI on Purchase
  but are not first-class resources exposed by the Data Exchange API. member_id
  is a plan/PBM member identifier; prescriber_spi is a prescriber SPI; ndc is an
  NDC-11 drug code.