42 CFR §414.1318

1. (a)Eligibility and special status—(1) General. Except as provided under paragraph (a)(2) of this section and subject to paragraph (a)(4) of this section, for a MIPS payment year, determinations of meeting the low-volume threshold criteria and special status for a subgroup is determined at the group level in accordance with §§ 414.1305 and 414.1310.
   1. (2)Exclusions. An individual eligible clinician or group that elects to participate in MIPS as a MIPS eligible clinician in accordance with § 414.1310(b)(1)(iii)(A) or (b)(2) is not eligible to participate in a subgroup.
   2. (3)Single subgroup per eligible clinician. An individual eligible clinician (as represented by a TIN-NPI combination) may register for no more than one subgroup within a group's TIN.
   3. (4)Subgroup determination period. CMS will apply the low-volume threshold criteria for a subgroup as described under paragraph (a)(1) of this section using information from the initial 12-month segment of the applicable MIPS determination period.
2. (b)Final score. Except as provided under § 414.1317(b) and paragraph (b)(1) of this section, each MIPS eligible clinician in the subgroup receives a final score based on the subgroup's combined performance.
   1. (1)CMS will not assign a final score for a subgroup that registers and does not submit data as a subgroup for the applicable performance period.
   2. (2)[Reserved]
3. (c)Subgroup reporting requirements. For individual eligible clinicians to participate in MIPS as a subgroup, all of the following requirements must be met:
   1. (1)Individual eligible clinicians that elect to participate in MIPS as a subgroup must aggregate their quality and improvement activities performance data across the subgroup's identifier.
   2. (2)Individual eligible clinicians that elect to participate in MIPS as a subgroup will have their performance assessed at the subgroup level across all the MIPS performance categories based on an MVP in accordance with § 414.1365. Subgroups that are MVP Participants must adhere to an election process described in § 414.1365(b).