US · guidance
CMS Pub. 100-04, ch. 28, § 70
Coordination of Medicare With Medigap and Other Complementary Health
Insurance Policies
(Rev. 4069, Issued: 06-08–18, Effective: 07-09-18, Implementation: 07-09-18)
For applicable policy on information sharing, see Pub 100-1, the Medicare General Information, Eligibility
and Entitlement Manual, Chapter 6.
For applicable cost sharing policy, see Pub 100-06, the Medicare Financial Management Manual, Chapter 1.
Cost Calculation Process Leading Up to the BCRC’s Assumption of Claim-Based Medigap Crossovers
Up to and including the final claims transferred under their pre-existing mandatory Medigap (claim-based)
crossover processes (note: the “final” claims should be those processed by the A/B MAC (Part B) or DME
MAC just before the October 2007 release is installed), A/B MACs (Part B) and DME MACs should
determine the frequency at which they routinely transmit notices to all Medigap insurers but must transmit
not less often than monthly. (See §70.4)
Effective October 1, 2005, CMS fully consolidated the eligibility file-based claims crossover process, as it
relates to Medigap insurers and other commercial payers, under the BCRC. Refer to §70.6 and succeeding
sub-sections for A/B MAC (Part B) and DME MAC requirements and responsibilities relating to the
national Coordination of Benefits Agreement (COBA) consolidated crossover process. Refer to §70.6.4 for
all MAC requirements relating to the COBA Medigap claim-based crossover process, which was
inaugurated on October 1, 2007. (See also Pub.100-04 chapter 27 §80.7.)
Following crossover consolidation, all A/B MACs (Part B) and DME MACs shall continue to pursue
collection of unpaid debts from Medigap insurers and other existing trading partners, even after such entities
have been transitioned to the COBA process. Those MACs that maintained claim-based crossover
arrangements with Medigap insurers shall pursue collection of their invoices up through and including their
invoices for the final claims transfer to the Medigap entities. These invoices should have been issued no
later than one (1) month following the last claims transfer to the Medigap insurers.
Suppression of Sanctioned Provider Claims from Claim-Based Medigap Crossovers
Effective with April 2, 2007, all A/B MACs (Part B) and DME MACs shall suppress fully denied provider
sanctioned claims for their mandatory Medigap crossover process with Medigap insurers, as authorized by
§1842(h)(3)(B) of the Social Security Act and §4081(a)(B) of the Omnibus Budget Reconciliation Act of
1987 [Public Law 100-230].
NOTE: All A/B MACs (Part B) and DME MACs shall continue to suppress 100 percent paid and 100
percent denied claims from their mandatory Medigap crossovers, per previous CMS guidance.
History
(Rev. 4069, Issued: 06-08–18, Effective: 07-09-18, Implementation: 07-09-18)
Provenance
- Source
- cms.gov
- Retrieved
- 2026-08-25
- Edition
- iom-2026-08-25
- Content hash
3996e18b423a7a55ae48088e2fbda3e26c210674dfb03526c4b8eebc9acf910f
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