What it does
MM 99 23 Rate Modification – Massachusetts is listed on CAR's January 2027 forms and endorsements appendix (03 24 edition) with no specific manual rule reference. As its title indicates, it records a rate modification applied to a Massachusetts commercial auto policy.
Who sees it
Massachusetts commercial auto insureds whose premium reflects a rate modification permitted under the insurer's or CAR's rules.
Key points
- It is a premium-related form; it does not change coverage.
- A separate form, MM 99 68 Premium Adjustment and Coverage Endorsement – Massachusetts, is used when the premium must be recalculated because rates in effect when the policy was prepared differ from those at inception.
Quoting notes
When presenting a Massachusetts renewal, explain the modification shown on MM 99 23 and how it moved the premium.
