Gross Keith M MD They are knowledgeable in the following conditions / disorders: Skin Allergies. Gross Keith M MD is located on 655 S 7th Ave in Barstow. They can be reached by phone by calling (760) 255-3376 . They can be reached by calling (760) 255-3376 . They can perform the following procedures / treatments: Skin Care & Rejuvenation. They have not yet been reviewed on MojoPages.com.