• Integration Overview
  • Consumer Payments
  • Consumer Billing
  • Healthcare
  • Disbursement Hub

Consumer Payments

  • Consumer Initiated Payments
  • Staff Initiated Payments
  • Payment Plans
  • Tokenization
  • Automatic Payment Collection
    • Automatic Payments Enrollment
    • Automatic Payments Trigger
      • Balance File Specification
      • Balance File Acknowledgement
    • Auto Payment Collect Batch Enrollment
      • Batch Unenrollment
    • Enhanced Enrollment File
    • Automatic Payments Sign Up File
  • Receipts
  • Voids
  • Refunds
  • Payment Posting
    • Polling Payment Response
    • Posting File Formats
      • EOD Posting File 1.4
      • EOD Posting File 1.3
      • EOD Posting File 1.2.2
      • EOD Posting File 1.2/1.2 CR
      • EOD Posting File 1.2.1
      • EOD Posting File 1.1/1.1 CR
      • EOD Posting File 1.1.1
      • EOD Posting File 1.0
      • EOD Posting File X12 835 1.0
      • EOD Posting File X12 835 2.0
      • EOD Posting File Lockbox A
      • EOD Posting File Lockbox A1.1
      • EOD Posting File Lockbox A v2
      • EOD Posting File Lockbox B
      • EOD Posting File Lockbox C
      • EOD Posting File Lockbox C v2
      • EOD Posting File Lockbox D
      • EOD Posting File Lockbox E
      • EOD Posting File Lockbox F
      • EOD Posting File Lockbox G
      • EOD Posting File Lockbox G v2
      • EOD Posting File LockBox H
      • EOD Posting File Lockbox I v1
      • EOD Posting File Lockbox L
      • Member Payments EOD Posting File v1.0
      • Payment Deposit File 1.0
      • Payment Deposit File 2.0
    • Webhook
    • Payment Interface Testing
    • Payment Transaction Import
      • Payment Transaction Import Data Fields
      • IDF Acknowledgement Data Fields
  • PCI Compliance
    • Recommended Options for PCI Compliance
    • Software Development Impact of PCI Compliance
    • Hosting Impact of PCI Compliance
    • P2PE Devices
  • Consumer Profile
    • Consumer Experience
    • Staff Experience
  • Digital Wallet
  • Google Pay
  • Member Payments
    • Manage Member Payment Methods
    • New Member Payment
    • View Member Payment History
    • View Member Payment Receipt
    • Member Payments Webhook
  • Member Effectuation
  • Member IDF Import v1.1
  • User Management
  • Request Sandbox API Key
  • Contact
  • Terms of Use
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InstaMed Developer Portal
  • Integration Overview
  • Consumer Payments
  • Consumer Billing
  • Healthcare
  • Disbursement Hub
  • Consumer Initiated
    • In App Apple Pay
  • Staff Initiated
  • Payment Plans
  • Tokenization
  • Automatic Payment Collection
    • Enrollment
    • Trigger
      • Balance File Specification
      • Balance File Acknowledgement
    • Batch Enrollment
      • Batch Unenrollment
    • Enhanced Enrollment File
    • Sign Up File
  • Receipts
  • Voids
  • Refunds
  • Payment Posting
    • Polling Payment Response
    • Posting File Formats
      • EOD Posting File 1.4
      • EOD Posting File 1.3
      • EOD Posting File 1.2.2
      • EOD Posting File 1.2/1.2 CR
      • EOD Posting File 1.2.1
      • EOD Posting File 1.1/1.1 CR
      • EOD Posting File 1.1.1
      • EOD Posting File 1.0
      • EOD Posting File X12 835 1.0
      • EOD Posting File X12 835 2.0
      • EOD Posting File Lockbox A
      • EOD Posting File Lockbox A1.1
      • EOD Posting File Lockbox A v2
      • EOD Posting File Lockbox B
      • EOD Posting File Lockbox C
      • EOD Posting File Lockbox C v2
      • EOD Posting File Lockbox D
      • EOD Posting File Lockbox E
      • EOD Posting File Lockbox F
      • EOD Posting File Lockbox G
      • EOD Posting File Lockbox G v2
      • EOD Posting File LockBox H
      • EOD Posting File Lockbox I v1
      • EOD Posting File Lockbox L
      • Member Payments EOD Posting File v1.0
      • Payment Deposit File 1.0
      • Payment Deposit File 2.0
    • Webhook
    • Payment Interface Testing
    • Payment Transaction Import
      • Payment Transaction Import Data Fields
      • IDF Acknowledgement Data Fields
  • PCI Compliance
    • Recommended Options
    • Software Development Impact
    • Hosting Impact
    • P2PE Devices
  • Consumer Profile
    • Consumer Experience
    • Staff Experience
  • Digital Wallet
  • Google Pay
  • Member Payments
    • Manage Payment Methods
    • New Payment
    • View Payment History
    • View Receipt
    • Webhook
  • Member Effectuation
  • Member IDF Import v1.1
  • User Management
  • Request Sandbox API Key
  • Contact
  • Terms of Use

Voids

Integrate void transactions to cancel a previous payment transaction

NOTE: A void cannot be completed after the transfer of funds has been initiated, the timing of which may vary based on scenario. (Please consult your InstaMed Integrations Manager for specific timing rules for your scenario)


Integration Options

Voids may use a different implementation than payment transactions.

Single Sign-On

Review the wizard below for interface display options, code examples and integration details.

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REST

Recommended for new integrations where the user experience is heavily controlled by the software application. 

Explore our REST documentation.  If you need a Sandbox API Key, apply for one here.


NVP

HTTP POST Name Value Pair (NVP) is a simple to use format that works across all platforms.

Sample Request

POST /payment/NVP.aspx HTTP/1.1
Host: connect.instamed.com
Content-Type: application/x-www-form-urlencoded
Content-Length: NNN

transactionType=CreditCard&transactionAction=Void&MerchantID=123123123&StoreID=123&TerminalID=123&primaryCardPresentStatus=PresentManualKey&primaryTransactionID=EE52401813A74328AAA7D93319FF4383&

Sample Response

responseCode=000&responseMessage=APPROVED&transactionStatus=C&primaryTransactionID=EE52401813A74328AAA7D93319FF4383&primaryTransactionStatus=V

SOAP

SOAP Web Services utilizing SOAP version 1.1 or SOAP version 1.2 to transport data. Connectivity requires 2048 bit TLS security.

DoCreditCardSecondaryVoid

https://connect.instamed.com/payment/service.asmx?op=DoCreditCardSecondaryVoid

InstaMed Online

Standalone portal for software vendors who do not yet have a consumer-facing application to embed into.

Using Payment Quick Search, find the payment and click void on the receipt. 
https://online.instamed.com/providers/Form/PatientPayments/PaymentQuickSearch 

Build a better healthcare payments experience with InstaMed

Talk With an InstaMed Expert
  • Request Sandbox API Key
  • Contact
  • Terms of Use

InstaMed is a wholly owned subsidiary and is a registered MSP/ISO of JPMorgan Chase Bank, N.A. Additionally, InstaMed is a registered ISO of U.S. Bank, N.A. and a registered MSP/ISO of Elavon, Inc., Georgia.

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