Leanne J. Cha, MD earned a degree of a Doctor of Medicine. Licenses and Affiliations. Leanne J. Cha, MD has been registered with the National Provider Identifier database since June 17, 2005, and her NPI number is 1225033905. Book an Appointment. To schedule an appointment with Dr. Leanne J. Cha, please call (703) 356-5700..