M15 – Separately Reimbursable Services May Be Billed as a Combined Service

The M15 RARC code indicates that services billed separately may be reimbursed only when submitted as a combined or comprehensive service. This Remittance Advice Remark Code (RARC) provides additional information about how the payer processed the claim and is typically reported alongside a Claim Adjustment Reason Code (CARC).

Providers should review both the associated CARC and payer billing guidelines before determining whether a corrected claim is appropriate.

Quick Facts

RARC Code
M15

Code Type
Remittance Advice Remark Code (RARC)

Category
Billing Requirement

Meaning
Services billed separately may only be reimbursed when submitted as a combined service.

Common Payers
Medicare, Medicaid, and Commercial Insurance

Next Step
Review payer billing guidelines and the associated CARC to determine whether the services should be billed together.

What Does the M15 RARC Code Mean?

The M15 RARC code informs providers that the services submitted separately are eligible for reimbursement only when billed as a single comprehensive service.

Rather than identifying the primary reason for the adjustment, the remark code provides additional clarification regarding the payer's billing requirements.

Providers should review coding guidance to determine whether the claim should be corrected and resubmitted.

Common Causes

Providers may receive the M15 RARC code when:

• Related procedures are billed separately instead of together.

• Payer billing policies require a comprehensive service code.

• Coding guidelines require combined reporting.

• Services are submitted using individual CPT codes rather than the appropriate bundled code.

• Billing does not follow payer reimbursement rules.

Reviewing the associated CARC helps explain the primary payment adjustment.

How To Resolve the M15 RARC Code

If you receive the M15 remark code:

• Review the associated CARC.

• Compare the billed CPT codes with payer billing guidelines.

• Determine whether a comprehensive procedure code should have been reported.

• Review supporting documentation.

• Submit a corrected claim if appropriate.

Providers should not automatically appeal the adjustment without first confirming the payer's billing requirements.

Common Billing Mistakes

Common issues associated with the M15 RARC code include:

• Billing related procedures separately.

• Using incorrect CPT codes.

• Overlooking payer billing policies.

• Failing to review the associated CARC.

• Submitting corrected claims without verifying coding requirements.

Following payer billing guidelines helps reduce unnecessary claim corrections.

Frequently Asked Questions

What is the M15 RARC code?

The M15 RARC code indicates that services billed separately may only be reimbursed when submitted as a combined service.

Is M15 a denial code?

No. M15 is a Remittance Advice Remark Code (RARC) that provides additional information about a payment adjustment. It is usually reported with a Claim Adjustment Reason Code (CARC).

Should providers submit a corrected claim?

It depends. Providers should review payer billing guidelines and the associated CARC before determining whether the claim should be corrected.

Does M15 always require an appeal?

No. Many M15 adjustments are processed according to payer billing policies and do not require an appeal.

Related RARC Codes

You may also encounter:

• N20 RARC Code

• MA130 RARC Code

• N30 RARC Code

• N290 RARC Code

Quick Summary

The M15 RARC code indicates that services billed separately may only be reimbursed when reported as a combined service. Providers should review the associated CARC, payer billing guidelines, and coding requirements before submitting a corrected claim or appeal.