Medically Unlikely Edits (MUE)
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Defines Quartz's application of CMS/ForwardHealth MUEs to claims processing and billing practices for professional, outpatient facility, and DME claims, including rules for unit billing, appeals, and date-spanned DME supplies; applies to Quartz lines specified in the document.
No material clinical or coverage changes in this revision.
MUE Application and Billing Rules
MUE application and billing rules
Coverage and claim handling rules for MUEs and multi-day DME supplies:
ALL of the following
- Quartz applies CMS NCCI and ForwardHealth MUE standards across professional, outpatient facility, and DME claims.
- There are three MAI categories: MAI 1 (may be overridden with proper documentation), MAI 2 (absolute date of service limit; cannot be overridden), and MAI 3 (may be overridden with documentation).
- Bill units equal to or below the MUE on one claim line; bill units exceeding the MUE on a second claim line. For UB claim forms, charges for units exceeding the MUE should be placed in the appropriate non-covered charges field.
- Claim lines that exceed the MUE limit will be denied but may be appealed with supporting documentation when the MAI allows override (MAI 1 and MAI 3 may be overridden; MAI 2 cannot).
ALL of the following
- For Commercial, Level Funded, and Medicare Advantage lines of business: DME and multi-day supplies must be date-spanned to reflect the full duration of use rather than submitted as single-day claim lines.
- Example: a three-month supply beginning 2/1/2026 and ending 4/30/2026 should be billed with a date span of 2/1/26-4/30/26 to reflect the full supply period.
- Quartz performs post-payment reviews and audits; providers must submit requested supporting documentation. Misuse of coding or exceeding limits may result in education, recoupment, or other corrective action.
Required Coding Systems and Unit Handling
| CPT/HCPCS | Standard procedure and supply codes must be used and supported by documentation. |
Appeals, DME Billing, and Post-payment Review
Appeal denied MUE lines when MAI allows override
Claim lines that exceed the MUE limit will be denied but may be appealed with supporting documentation when the MAI allows override; MAI 1 and MAI 3 may be overridden with documentation, while MAI 2 cannot be overridden.
- MAI 1 (Claim Line Edit) — may be overridden with proper documentation; appeals are considered with supporting evidence.
- MAI 2 (Absolute Date of Service Limit) — cannot be overridden; no modifiers or documentation will result in payment above the limit.
- MAI 3 (Date of Service Edit) — may be overridden; additional units may be payable if sufficiently documented and appealed.
Date‑span multi‑day DME/supply claims
For Commercial, Level Funded, and Medicare Advantage lines, billers must date-span DME and multi-day supply claim lines to reflect the full duration of use rather than submitting single-day lines.
- Providers shall indicate the full supply period on the claim line using a date range.
- Example: a three‑month supply from February 1, 2026 through April 30, 2026 should be billed as 2/1/26–4/30/26.
- Apply date‑spanning for DME/supplies intended as multi‑day supplies on applicable Quartz lines of business (Commercial, Level Funded, Medicare Advantage).
Provide documentation for post‑payment reviews
Providers must submit supporting documentation upon request for post‑payment reviews; failure or misuse may result in provider education, recoupment, or other corrective action.
- Quartz conducts post‑payment reviews and audits to ensure policy compliance.
- Misuse of codes, modifiers, or exceeding service limits identified in review may lead to education, recoupment, or corrective action.
- Respond to documentation requests promptly as part of claim review processes.
Key Terms
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