Our clinicians are board-certified, multilingual, and genuinely committed to your long-term health.
Family Medicine · Lead Physician
Dr. Ravinder Singh founded Rancho Wellness around a simple conviction: that primary care should feel like a relationship, not a transaction. He leads the practice across both Inland Empire clinics and sees patients of every age, with a particular focus on adults managing long-term conditions.
Family Nurse Practitioner
Heidi Larson sees patients of all ages across both the Upland and Rancho Cucamonga clinics. Patients describe her visits as thorough and refreshingly unhurried — she takes time to explain the why behind every recommendation.
Internal Medicine
Dr. Lakshita Gupta focuses on adult preventive care and the day-to-day management of chronic conditions, with a strong emphasis on lifestyle medicine — nutrition, movement, sleep, and stress.
Family Nurse Practitioner
Maria Castillo is a bilingual family nurse practitioner with a special interest in the Seniors First Program and women’s health. She is often the first call for our older patients and their families.
Family Medicine · Lead Physician
Dr. Ravinder Singh founded Rancho Wellness around a simple conviction: that primary care should feel like a relationship, not a transaction. He leads the practice across both Inland Empire clinics and sees patients of every age, with a particular focus on adults managing long-term conditions.
Internal Medicine
Dr. Lakshita Gupta focuses on adult preventive care and the day-to-day management of chronic conditions, with a strong emphasis on lifestyle medicine — nutrition, movement, sleep, and stress.
Family Nurse Practitioner
Heidi Larson sees patients of all ages across both the Upland and Rancho Cucamonga clinics. Patients describe her visits as thorough and refreshingly unhurried — she takes time to explain the why behind every recommendation.
Physicians Assistant
Barbara Santa Cruz is a dedicated physician assistant at Rancho Wellness with over 44 years of experience in healthcare, specializing in menopausal care, chronic disease management, and bioidentical hormone replacement therapy.
Physicians Assistant
Hilda Mancilla, PA-C, is a dedicated physician assistant at Rancho Wellness in Rancho Cucamonga and Upland, passionate about preventive care, patient education, and promoting healthy lifestyles with 24 years of experience.
