# Stedi's CMS-1500 claim form now supports line item control numbers

> You can now set line item control numbers for individual service lines in a professional claim using the Stedi portal’s CMS-1500 form.

Published Mar 30, 2026

Product: Claims

You can now set line item control numbers for individual service lines in a professional claim using the Stedi portal’s [CMS-1500 form](https://www.stedi.com/docs/healthcare/submit-professional-claims-ui#cms-1500-claim-form).

[Watch the video](https://www.stedi.com/changelog/media/stedis-cms-1500-claim-form-now-supports-line-item-control-numbers/cAfUpwkjqe3V4swUsgUbo3pQVxE.mp4)

## What is a line item control number?

In a claim, a service line represents billing for a specific service, such as an office visit or X-ray.

A line item control number is a unique, provider-assigned identifier for each service line in a claim.

Payers return line item control numbers in [Electronic Remittance Advice (ERAs)](https://www.stedi.com/docs/healthcare/claim-responses-overview#835-electronic-remittance-advice-era). Both providers and payers can use them to track service lines and reconcile claim submissions with payments.

Previously, the CMS-1500 form automatically assigned a random identifier to each service line. Now you can set your own.

## How it works

When submitting a claim using the Stedi portal’s CMS-1500 form, click **Set manual line item control numbers** in the service lines table to reveal the **Line Item Control Number** field for each service line.

You can enter up to 30 characters per line. Each number must be unique within the claim.

Once you enter a line item control number, the fields stay visible and can't be hidden. To hide empty fields, click **Hide manual line item control numbers**.

If you later need to resubmit a claim using the CMS-1500 form, any existing line item control numbers are automatically mapped to the new submission.