How do I resolve a CO-A1+N370 denial?

A Redetermination request may be submitted with all relevant supporting documentation. Review applicable Local Coverage Determination (LCD), LCD Policy Article, and documentation checklists prior to submitting request. Noridian encourages Redeterminations be submitted using the Noridian Medicare Portal.

Can I appeal a CO-A1+N370 denial?

CO-A1+N370 denials are generally not appealable. Oxygen equipment has exceeded number of approved paid rentals

835 Denial Combination

CO-A1+N370

Contractual Obligation · Service-Line Level Adjustment

What This Combination Means

Oxygen equipment has exceeded number of approved paid rentals

N/A

Appeal Success

7-14 days

Avg. Resolution

Medium

Difficulty

Appealable

Step-by-Step Resolution

Steps tailored specifically to this CO-A1+N370 combination — not generic advice.

1
A Redetermination request may be submitted with all relevant supporting documentation. Review applicable Local Coverage Determination (LCD), LCD Policy Article, and documentation checklists prior to submitting request. Noridian encourages Redeterminations be submitted using the Noridian Medicare Portal.

Specialty Context

How CO-A1+N370 typically presents across different practice types.

Dental

Medical

Behavioral Health

Individual Code References

View the standalone definition for each code in this combination.

CARC A1 RARC N370

Medicare Contractor Guidance for CARC A1

Noridian

Oxygen equipment has exceeded number of approved paid rentals

How to Prevent CARC A1 Denials

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To verify if beneficiary has/has not had a same or similar item in the past, suppliers may call Noridian Interactive Voice Response (IVR) or use the Noridian Medicare Portal

Noridian Medicare PortalIVRSame or Similar

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