Magan medical clinic, Dermatology. 420 W Rowland St, 2 nd Floor. Covina, CA 91723. Phone No. General Line- 626 331 6411. For appointments- 626 251 1500. FAX- 626 251 1552 . Read- Acorn Clinic, Lakeview Clinic . 3〉 Cardiovascular Lab. Magan medical clinic is very proud to offer state of the art testing to their patients in San Gabriel Valley..