My Chart - Patient Portal; Medical Education; For Physicians; Search Our Site; ER Wait Time | Door To Provider: minutes. If this is a life threatening emergency, call 911. Find A Provider Alissa Walker MD. Alissa Walker, MD. Alissa Walker, MD. NPI Number: 1922486166; Primary Specialty: Obstetrics and Gynecology. Gender: Female Locations. 6255 ....