The Commissioner of Social Services shall establish a uniform fee schedule to equitably apply to practitioners of the healing arts and allied professions or callings set forth in chapters 370 to 383, inclusive, and vendors of sickroom supplies, for their services to needy persons chargeable to the state and to those persons included in medical assistance programs under Title XIX of the Social Security Amendments of 1965, as amended, entitled “Grants to States for Medical Assistance Programs”. Said fee schedule shall be based on moderate and reasonable rates prevailing in the respective communities wherein the service is rendered.