We hope that you will consider making Mosaic Comprehensive Care your medical home. PATIENT PORTAL. LOCATION. Mosaic Comprehensive Care East 54 - 1240 Environ Way Chapel Hill, NC 27517. P: 919-240-7269 F: 919-240-7816. OFFICE HOURS. Monday - Thursday 8:00 a.m. - 5:00 p.m. Friday.