---
title: "How can I download transmitted claims in 837 format through the API?"
slug: "how-can-i-download-transmitted-claims-in-837-format-through-the-api"
updated: 2026-08-28T21:24:09Z
published: 2026-08-28T21:24:09Z
canonical: "docs.claim.md/how-can-i-download-transmitted-claims-in-837-format-through-the-api"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.claim.md/llms.txt
> Use this file to discover all available pages before exploring further.

# How can I download transmitted claims in 837 format through the API?

Claim.MD provides an API service that allows you to generate an **ANSI X12 5010 837 file** containing claims that were transmitted through Claim.MD on a specified date.

## What claims can be downloaded?

You can retrieve transmitted claims in the following formats:

- **837P** – Professional claims
- **837I** – Institutional claims
- **837D** – Dental claims

You can also narrow the results by billing provider NPI, billing provider Tax ID, or payer ID.

**Important:** The downloaded 837 is newly generated using the claim data currently stored in Claim.MD. It is **not an archived copy of the originally transmitted file**. If a claim was changed after transmission, those changes may appear in the generated file. Control numbers and other envelope values may also differ from the original submission.

## How many claims are returned?

Each request can return up to **1,000 claims**. If more than 1,000 claims match the request, additional pages must be requested until no additional claims are available.

## What information is required?

The request requires your Claim.MD **AccountKey**, the **transmission date**, and the type of claim you want to retrieve.

For request parameters, pagination instructions, response formats, and code examples, see the [Download Transmitted Claims API documentation](https://api.claim.md/#/paths/~1services~1claimdata~1/post).