42 CFR §424.527

1. (a)New provider or supplier. Exclusively for purposes of both section 1866(j)(3) of the Act and this § 424.527, the term “new provider or supplier” is defined as any of the following:
   1. (1)A newly enrolling Medicare provider or supplier. (This includes providers that are required to enroll as a new provider in accordance with the change in majority ownership provisions in § 424.550(b).)
   2. (2)A certified provider or certified supplier undergoing a change of ownership consistent with the principles of 42 CFR 489.18. (This includes providers that qualify under § 424.550(b)(2) for an exception from the change in majority ownership requirements in § 424.550(b)(1) but which are undergoing a change of ownership under 42 CFR 489.18).
   3. (3)A provider or supplier (including an HHA or hospice) undergoing a 100 percent change of ownership via a change of information request under § 424.516.
   4. (4)A provider or supplier reactivating the provider's or supplier's Medicare enrollment and billing privileges in accordance with § 424.540(b).
2. (b)Effective date. The effective date of a provisional period of enhanced oversight that is commenced under section 1866(j)(3) of the Act is the date on which the new provider or supplier submits its first claim.