42 CFR § 409.31 - Level of care requirement.
(a) Definition. As used in this section, skilled nursing and skilled rehabilitation services means services that:
(1) Are ordered by a physician;
(2) Require the skills of technical or professional personnel such as registered nurses, licensed practical (vocational) nurses, physical therapists, occupational therapists, and speech pathologists or audiologists; and
(3) Are furnished directly by, or under the supervision of, such personnel.
(b) Specific conditions for meeting level of care requirements.
(1) The beneficiary must require skilled nursing or skilled rehabilitation services, or both, on a daily basis.
(2) Those services must be furnished for a condition -
(iii) For which, for an M + C enrollee described in § 409.20(c)(4), a physician has determined that a direct admission to a SNF without an inpatient hospital or inpatient CAH stay would be medically appropriate.