What does resubmission code 6 mean in a claim?

Editorial team Published on

Resubmission code 6 means a corrected or adjusted claim that modifies an existing claim before its processing is fully finalized.

Key Details About Code 6

  • Meaning: It acts as a pre-adjudication adjustment code used to update details (such as a charge amount or diagnosis) while the insurance company is still reviewing the original submission.
  • Location: Found in Box 22 of a CMS-1500 paper form (or equivalent electronic loop segments) alongside the original reference number.
  • Common Rejections: Many insurance payers and clearinghouses do not accept code 6 and will reject the claim. Most electronic and paper systems require code 7 (Replacement of prior claim) instead, even for corrections.

What You Should Do

  • Check Payer Rules: Contact the insurance provider or check their billing guidelines to see if they accept code 6.
  • Switch to Code 7: If your claim is rejected with an invalid code error, change the resubmission code from 6 to 7 (Replacement) and include the original claim's reference number (ICN/Control Number).

What is the difference between resubmission code 6 and 7?

Resubmission code 6 means a pre-adjudication adjustment to modify a claim before processing is finalized, while code 7 means a replacement that completely replaces a previously processed or adjudicated claim.

Key Differences

  • Code 6 (Corrected / Adjustment): Used to modify a claim data point before final processing or adjudication is complete (often used for minor pre-adjudication corrections like a charge or diagnosis update). Note that many payers do not accept code 6 and will reject it, requiring code 7 instead.
  • Code 7 (Replacement of Prior Claim): Used when an original claim has already been fully processed, denied, or adjudicated and needs a complete replacement with corrected data (such as fixing a CPT code, modifier, or date of service).
  • System Action: Code 7 acts as a direct replacement that supersedes the prior adjudicated record, whereas code 6 is meant for adjustments while a claim is still pending or handled as an in-process modification (where supported).
  • Requirements: Both codes generally require an Original Reference Number linking the new submission back to the initial claim tracking ID, though payer rules vary widely.

What are the resubmission codes?

Resubmission codes (also called claim frequency codes) are numeric identifiers used in medical billing to tell an insurance payer whether a submitted claim is brand new, a correction to an existing claim, or a cancellation.

Common Resubmission Codes

  • 1 – Original Claim: Used for the first-time submission of a claim (or if the payer has no record of the original).
  • 6 – Corrected Claim: Used in electronic billing to indicate updated or modified information on a previously processed claim.
  • 7 – Replacement of Prior Claim: The industry standard for paper and electronic claims (often called a Claim Frequency Code Tool) used to replace an incorrect claim with new info, such as a corrected procedure code or patient birthdate.
  • 8 – Void / Cancel Prior Claim: Used to completely cancel a previously submitted or processed claim that should never have been billed (preventing double-billing or audit risks).

Key Requirements

  • Original Reference Number: When using codes 6, 7, or 8, you must include the original claim reference number (also known as the ICN or Payer Claim Control Number). On standard paper forms like the CMS-1500, these go into Box 22.
  • Payer Rules: Specific requirements vary by insurance company. For example, traditional Medicare generally only accepts code 1. Always check with the specific Payer Claim Resubmission Requirements before filing.

What is the claim resubmission code?

A claim resubmission code (or claim frequency code) is a numeric identifier entered in Box 22 of a medical billing form to tell an insurance payer whether a claim is new, corrected, or canceled.

Common Resubmission Codes

  • 1 – Original Claim: Used for the very first submission of a claim.
  • 6 – Corrected Claim: Used on electronic claims to show updated information.
  • 7 – Replacement (Corrected) Claim: Used to replace a previous claim that had errors like a wrong code or typo.
  • 8 – Void/Cancel Claim: Used to completely cancel a claim that was submitted or paid incorrectly.

Important Rules

  • Codes like 7 and 8 usually require an Original Reference Number (also called an ICN or Payer Claim Control Number) to link the new form to the old one.
  • Paper claims generally only accept codes 7 and 8.
  • Specific payers like Medicare may have unique rules, such as only accepting code 1 for certain workflows.

What is code 7 on corrected claim resubmission?

Code 7 on a corrected claim resubmission is the industry standard frequency code that means "Replacement of prior claim."

What Code 7 Does

  • Signals a Replacement: It tells the insurance company to completely replace an old, previously submitted claim with this new, corrected version.
  • Prevents Duplicates: Without Code 7, the payer's software might treat your new submission as an accidental duplicate and reject it.
  • Triggers a Recoupment: When processed, the payer typically voids or adjusts the original claim and replaces it with the new data.

Requirements When Using Code 7

  • Include All Services: You must resubmit the entire claim or episode of care, including all original service lines—not just the single line you changed.
  • Provide the Original Claim Number: You must link the correction to the original Document Control Number (DCN) or claim ID found on your initial Remittance Advice (RA) or Explanation of Benefits (EOB).

Claim Corrections & Resubmission Codes - Chapter 24

9 related questions found

What is resubmission code 6?

Resubmission code 6 in medical billing stands for a corrected or adjusted claim (pre-adjudication adjustment) used to modify a claim before final processing.

Overview of Resubmission Code 6

  • Definition: Indicates an adjustment or correction made to an existing electronic claim before it is fully adjudicated by the payer.
  • Form Location: Entered on the left side of Box 22 (Claim Frequency Code) on a CMS-1500 form, accompanied by the original reference/claim number on the right.
  • Electronic vs. Paper: Allowed for electronic submissions by some platforms, but paper claims generally only accept codes 7 or 8.

Common Issues and Rejections

  • Payer Rejections: Many insurance payers and clearinghouses do not accept code 6 and will reject the claim (often returning an invalid frequency code error).
  • Alternative Codes: When code 6 is rejected or unsupported, payers usually require Code 7 (Replacement of prior claim) for corrections or Code 8 (Void/cancel prior claim).

You can check specific clearinghouse guidelines through Therabill Support or Jane App Box 22 Guide to confirm how your specific payer expects corrections.

What will cause a CMS 1500 claim to be rejected?

A CMS-1500 claim is typically rejected before processing due to missing, invalid, or inaccurate data fields.

Common Causes of CMS-1500 Rejections

  • Incorrect Patient or Insured Information: Mismatches or typos in the patient's name, date of birth (Box 3), or member/policy ID number (Box 1a) cause immediate front-end rejections.
  • Provider Identifier Errors: Leaving the National Provider Identifier (NPI) blank or entering an incorrect NPI for the rendering provider (Box 24J) or billing provider (Box 33a) halts the claim.
  • Invalid or Deleted Diagnosis Codes: Using an inactive, deleted, or insufficiently specific ICD-10 code in Box 21 violates medical necessity guidelines and results in an automatic rejection.
  • Missing Tax ID or Employer ID: Failing to include or mistyping the federal Tax ID or SSN in Box 25 triggers entity code rejections.
  • Missing Referring Provider Details: Leaving Box 17 blank when services or therapies require a referral or order from an attending or consulting doctor will stop the claim.
  • Incorrect Payer ID: Submitting the form using the wrong electronic payer ID prevents the clearinghouse or insurance carrier from routing the claim correctly.

What does claim resubmission code 8 mean?

Claim resubmission code 8 (also called Claim Frequency Type Code 8) means a void or cancellation of a prior claim.

When to Use Code 8

  • Cancel incorrect submissions: Use it to completely wipe out a previously submitted and processed or paid claim that contained major errors.
  • Before a replacement: Some payers require you to void an incorrect paid claim using Code 8 before you can submit a completely new, corrected claim using Claim Frequency Type Code 7.
  • Duplicate prevention: It tells the insurance company's system that the specific encounter should no longer be on file or considered for payment.

Requirements for Filing Code 8

  • Original Claim Number: You must include the original Internal Control Number (ICN) or Document Control Number (DCN) assigned by the payer to link the cancellation properly.
  • Form Placement: On paper CMS-1500 forms, enter code 8 in Box 22 alongside the original claim reference number. On electronic (837) claims, it is placed in loop 2300 under segment CLM05-3.
  • Do not use for rejections: Code 8 is meant for previously processed or paid claims, not for initial claims that were outright rejected during the submission phase before adjudication.

What does denial code 6 mean in medical billing?

Denial code CO-6 means the billed procedure or revenue code does not match the patient's documented age.

  • Age Mismatch: The service is age-restricted.
  • System Flag: The patient's age falls outside the allowed range.
  • Common Example: Billing a pediatric vaccine or code for an adult.

🛠️ Steps to Resolve CO-6

✅ Correct the Patient's Date of Birth

  • Check the patient intake form.
  • Update the birth date in your billing software.
  • Resubmit the claim with correct demographics.

✅ Verify and Update the CPT/HCPCS Code

  • Review the medical chart for the actual service rendered.
  • Confirm if an adult or pediatric code was intended.
  • Exchange the code for the correct age-appropriate version.

✅ Appeal with Medical Records

  • Attach clinical notes if the service was medically necessary.
  • Provide a letter of explanation from the provider.
  • Submit the appeal to the insurance payer.

What is the difference between a corrected claim and resubmission?

A corrected claim replaces a previously processed and adjudicated claim with new or updated data, whereas a resubmission sends a fresh clean claim after an initial rejection before it was ever processed.

Corrected Claim

  • Status of Original Claim: Already processed, finalized, or paid/denied by the insurance payer (has an Internal Control Number or ICN).
  • When to Use: When you need to change data on a claim that finished processing, such as fixing a wrong procedure code, updating a diagnosis, or correcting patient demographics.
  • How It Works: Requires a specific frequency/correction code (like Code 7) and reference to the original claim's unique ICN number so the payer replaces the old record instead of creating a duplicate.

Resubmission

  • Status of Original Claim: Rejected at the clearinghouse or payer level before adjudication (never actually processed or assigned a final claim number).
  • When to Use: When a claim is returned or rejected due to a basic formatting error, missing attachment, or clearinghouse scrub failure.
  • How It Works: Treated essentially as a new, clean submission once the preliminary error is fixed, without needing special replacement codes or original claim reference numbers.