The department may promulgate rules to further define the term "health facility or agency" and the definition of a health facility or agency listed in section 20106 as required to implement this article. The department may define a specific organization as a health facility or agency for the sole purpose of certification authorized under this article. For purpose of certification only, an organization defined in section 20106(5), 20108(1), or 20109(4) is considered a health facility or agency. The term "health facility or agency" does not mean a visiting nurse service or home aide service conducted by and for the adherents of a church or religious denomination for the purpose of providing service for those who depend upon spiritual means through prayer alone for healing.