# Claim edit: Invalid submitter ID

> Stedi now rejects 837P professional, 837D dental, and 837I institutional claims when the submitter ID doesn't match the payer's required format.

Published Mar 18, 2026

Product: Claim edits

Stedi now rejects [837P professional](https://www.stedi.com/docs/healthcare/submit-professional-claims), [837D dental](https://www.stedi.com/docs/healthcare/submit-dental-claims), and [837I institutional](https://www.stedi.com/docs/healthcare/submit-institutional-claims) claims when the submitter ID doesn't match the payer's required format.

## How the edit works

In a claim, the submitter ID tells the payer who submitted the claim.

This submitter isn't necessarily the provider who rendered care or is being paid for the claim. It could be a billing service or other vendor acting on the provider's behalf.

| **Claim type**                                                                          | **JSON API field**                                                                                                                                              | **X12 segment**                                                            |
| --------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------- |
| [837P professional](https://www.stedi.com/docs/healthcare/submit-professional-claims)   | [`submitter.submitterIdentification`](https://www.stedi.com/docs/healthcare/api-reference/post-healthcare-claims#body.submitter.submitterIdentification)        | `NM109` (Submitter Identification Number) of `Loop 1000A` (Submitter Name) |
| [837D dental](https://www.stedi.com/docs/healthcare/submit-dental-claims)               | [`submitter.submitterIdentification`](https://www.stedi.com/docs/healthcare/api-reference/post-healthcare-dental-claims#body.submitter.submitterIdentification) | `NM109` (Submitter Identification Number) of `Loop 1000A` (Submitter Name) |
| [837I institutional](https://www.stedi.com/docs/healthcare/submit-institutional-claims) | [`submitter.taxId`](https://www.stedi.com/docs/healthcare/api-reference/post-healthcare-institutional-claims#body.submitter.taxId)                              | `NM109` (Submitter Identification Number) of `Loop 1000A` (Submitter Name) |

### Payer-assigned submitter IDs

Most payers accept standard submitter IDs, such as an Employer Identification Number (EIN) or other Tax Identification Number (TIN).

Some payers, including some [Medicare Administrative Contractors (MACs)](https://www.stedi.com/blog/how-to-find-the-right-payer-for-medicare-claims) and state Medicaid programs, require submitters to use a specific payer-assigned submitter ID instead.

Payer-assigned submitter IDs are issued during [transaction enrollment](https://www.stedi.com/docs/healthcare/transaction-enrollment) and tend to follow payer-specific formats. For example, a required prefix followed by a fixed number of digits.

If you submit a claim to one of these payers and don’t use a payer-assigned submitter ID, the payer may reject the claim. This can delay payment for the provider.

This edit – the industry term for an automated validation rule – catches the issue before the claim reaches the payer.

## Rejection errors

If you submit a claim using Stedi's [Claim Submission API endpoints](https://www.stedi.com/docs/healthcare/intro-to-claim-submission#api-claim-submission) and the claim fails the edit, you'll get back an error response in real time. The response includes details in the `errors` array.

The exact error message varies by payer and includes guidance on how to fix the submitter ID. For example:

```jsonc
{
  "errors": [
    {
      "code": "33",
      "description": "Invalid Submitter Identifier. This payer requires a specific-assigned identifier that begins with AZ followed by 5 or 6 numbers. The submitted value 921545753 does not follow this format and must be confirmed with the payer. Correct and resubmit.",
      "followupAction": "Please Correct and Resubmit"
    }
  ]
}
```

If you submit a claim using [SFTP](https://www.stedi.com/docs/healthcare/submit-claims-sftp-connection) and the claim fails the edit, Stedi will reject the claim with a [277CA claim acknowledgment](https://www.stedi.com/docs/healthcare/claim-responses-overview#277ca-claim-acknowledgment). The acknowledgment will include a related [claim status category code](https://x12.org/codes/claim-status-category-codes), [claim status code](https://x12.org/codes/claim-status-codes), and error message.

```jsx
STC*A7>478*[DATE]*U*[AMOUNT]******A7>733>41**Invalid Submitter Identifier. This payer requires a specific-assigned identifier that begins with AZ followed by 5 or 6 numbers. The submitted value 921545753 does not follow this format and must be confirmed with the payer. Correct and resubmit.~
```