WALTER DUANE HINSHAW, D.O. Marriage and Family Therapists at Forest Ln, Garland, TX. License number. Texas E3019. Category. Osteopathic Medicine. Type. Family Medicine. Address. Address 2201 Forest Ln, Garland, TX 75042. Phone (972) 276-6822 (972) 487-4060 (Fax) National Provider ID: 1063622322.