15 Miss. Code R. § 16-1-45.2.12
The term "institution for the aged or infirm" (hereinafter referred to as facility or facilities) shall mean a place either governmental or private which provides group living arrangements for four (4) or more persons who are unrelated to the operator and who are being provided food, shelter, and personal care whether any such place be organized or operated for profit or not. The term "institution for the aged or infirm" includes nursing homes, pediatric skilled nursing facilities, psychiatric residential treatment facilities, convalescent homes and homes for the aged, provided that these institutions fall within the scope of the definition set forth above. The term "institutions for the aged or infirm" does not include hospitals, clinics, or mental institutions devoted primarily to providing medical service.
15 Miss. Code. R. § 16-1-45.2.12