Medicare Claims Processing Manual (Pub. 100-04), Ch. 18 § 10.4.2
CWF Edits on MAC (Part B) Claims
10.4.2 - CWF Edits on MAC (Part B) Claims
(Rev. 11355; Issued:04-14-22; Effective:05-16-22; Implementation:05-16-22)
In order to prevent duplicate payment by the same MAC (Part B), CWF will edit by line item on
the MAC (Part B) number, the MBI number, the date of service, the influenza virus procedure
codes 90630, 90653, 90654, 90655, 90656, 90657, 90658, 90660, 90661, 90662, 90672, 90673,
90674, 90682, 90685, 90686, 90687, 90688, 90694, or 90756; the pneumococcal procedure
codes 90670, 90671, 90677, or 90732; and the administration code G0008 or G0009.
1. If CWF receives a claim with either HCPCS codes 90630, 90653, 90654, 90655,
90656,90657, 90658, 90660, 90661, 90662, 90672, 90673, 90674, 90682, 90685, 90686,
90687, 90688, 90694, or 90756 and it already has on record a claim with the same MBI
number, same MAC (Part B) number, same date of service, and any one of those HCPCS
codes, the second claim submitted to CWF will reject.
2. If CWF receives a claim with HCPCS codes 90670, 90671, 90677, or 90732 and it
already has on record a claim with the same MBI number, same MAC (Part B) number,
same date of service, and the same HCPCS code, the second claim submitted to CWF will
reject when all four items match.
3. If CWF receives a claim with HCPCS administration codes G0008 or G0009 and it
already has on record a claim with the same MBI number, same MAC (Part B) number,
same date of service, and same procedure code, CWF will reject the second claim
submitted.
CWF will return to the MAC (Part B) a specific reject code for these edits. MACs (Part B) must
deny the second claim and use the same messages they currently use for the denial of duplicate
claims.
In order to prevent duplicate payment by the centralized billing contractor and local MAC (Part
B), CWF will edit by line item for MAC (Part B) number, same MBI number, same date of
service, the influenza virus procedure codes 90630, 90653, 90654, 90655, 90656, 90657, 90658,
90660, 90661, 90662, 90672, 90673, 90674, 90685, 90686, 90687, 90688, 90694, or 90756; the
pneumococcal virus procedure codes 90670, 90671, 90677, or 90732; and the administration
code G0008 or G0009.
If CWF receives a claim with either HCPCS codes 90630, 90653, 90654, 90655, 90656,
90657, 90658, 90660, 90661, 90662, 90672, 90673, 90674, 90682, 90685, 90686, 90687, 90688,
90694, or 90756 and it already has on record a claim with a different MAC (Part B) number, but
same MBI number, same date of service, and any one of those same HCPCS codes, the second
claim submitted to CWF will reject.
If CWF receives a claim with HCPCS codes 90670, 90671, 90677, or 90732 and it already has
on record a claim with the same MBI number, different MAC (Part B) number, same date of
service, and the same HCPCS code, the second claim submitted to CWF will reject.
If CWF receives a claim with HCPCS administration codes G0008 or G0009 and it already has
on record a claim with a different MAC (Part B) number, but the same MBI number, same
date of service, and same procedure code, CWF will reject the second claim submitted.
CWF will return a specific reject code for these edits. MACs (Part B) must deny the second
claim. The reject code should automatically trigger the following Medicare Summary Notice
(MSN) and Remittance Advice (RA) messages.
MSN: 7.2 – “This is a duplicate of a claim processed by another contractor. You should
receive a Medicare Summary Notice from them.”
Claim Adjustment Reason Code 18 – Exact duplicate claim/service
EDITS FOR CLAIMS SUBMITTED TO THE CENTRALIZED BILLING PROCESSING
MAC (PART B) AND THE LOCAL MAC (PART B)
In order to prevent duplicate payment by the centralized billing contractor and local MAC (Part
B), CWF will edit by line item for MAC (Part B) number, same MBI number, same date of
service, the influenza virus procedure codes 90630, 90653, 90654, 90655, 90656, 90657, 90658,
90660, 90661, 90662, 90672, 90673, 90674, 90685, 90686, 90687, 90688, 90694, or 90756; the
pneumococcal virus procedure codes 90670, 90671, 90677, or 90732; and the administration
code G0008 or G0009.
1) If CWF receives a claim with either HCPCS codes 90630, 90653, 90654, 90655, 90656,
90657, 90658, 90660, 90661, 90662, 90672, 90673, 90674, 90682, 90685, 90686, 90687,
90688, 90694, or 90756 and it already has on record a claim with a different MAC (Part B)
number, but same MBI number, same date of service, and any one of those same HCPCS
codes, the second claim submitted to CWF will reject.
2) If CWF receives a claim with HCPCS codes 90670, 90671, 90677, or 90732 and it already
has on record a claim with the same MBI number, different MAC (Part B) number, same
date of service, and the same HCPCS code, the second claim submitted to CWF will reject.
3) If CWF receives a claim with HCPCS administration codes G0008 or G0009 and it already
has on record a claim with a different MAC (Part B) number, but the same MBI number,
same date of service, and same procedure code, CWF will reject the second claim
submitted.
CWF will return a specific reject code for these edits. MACs (Part B) must deny the second
claim. The reject code should automatically trigger the following Medicare Summary Notice
(MSN) and Remittance Advice (RA) messages.
MSN: 7.2 – “This is a duplicate of a claim processed by another contractor. You should
receive a Medicare Summary Notice from them.”
Claim Adjustment Reason Code 18 – Exact duplicate claim/service