Md. Code Ann., Bus. Occ. & Prof. § 5-605

(a) Except as provided in §§ 5–302 and 5–303 of this title and subsection (b) of this section, a person may not practice cosmetology, provide esthetic services, provide eyelash extension services, provide hair services, provide hair services – blow drying, or provide nail technician services in any place other than: (1) a beauty salon that holds a beauty salon permit; or (2) a barbershop that holds a barbershop permit issued under Title 4 of this article.

(b) (1) A licensed cosmetologist, esthetician, eyelash extension technician, hairstylist, hairstylist – blow dry technician, or nail technician may practice cosmetology and provide services in: (i) a facility in which beautification–oriented medical services, authorized by the Maryland Department of Health, are provided; (ii) the residence of an individual confined to the residence by reason of a physical or mental infirmity; (iii) an assisted living facility as defined in § 19–1801 of the Health – General Article; (iv) a hospice facility defined in § 19–901(c) of the Health – General Article; (v) a nursing home as defined in § 19–1401(e) of the Health – General Article; or (vi) a hospital as defined in § 19–301 of the Health – General Article or a similar institution. (2) To practice in any of the locations specified in this subsection: (i) the licensed cosmetologist, esthetician, eyelash extension technician, hairstylist, hairstylist – blow dry technician, or nail technician shall be sponsored by a beauty salon in which the cosmetologist, esthetician, hairstylist, hairstylist – blow dry technician, or nail technician is authorized to practice; (ii) the patron to whom the services are rendered shall be a customer of the beauty salon; and (iii) the services shall be rendered by appointment through the beauty salon.