Dr. Maria Elena Garcia-Nguyen, OD (NPI #1508982760) delivers optometric care in Allied Gardens through Kaiser Permanente's Zion Avenue campus at 4647 Zion Ave, San Diego, CA 92120. Active in the NPI registry since March 2007, she brings over 17 years of clinical practice within the Southern California Permanente Medical Group, treating a diagnostic caseload that spans astigmatism, presbyopia, blepharitis, dry eye syndrome, and diabetic retinopathy. Her ocular disease management includes glaucoma monitoring with intraocular pressure checks, visual field perimetry, and optical coherence tomography scans to measure retinal nerve fiber layer thickness at each follow-up. The Zion campus integrates optometry with the broader Kaiser Permanente Zion Medical Center, giving Dr. Garcia-Nguyen direct internal referral pathways to ophthalmology, endocrinology, and neurology when exam findings suggest systemic involvement. Cataract evaluations include a dilated lens assessment and a surgical candidacy referral within the Kaiser system when nuclear sclerosis progresses past the point of spectacle correction. Keratitis management protocols cover both bacterial and viral etiologies, with culture-guided antibiotic selection for contact-lens-associated corneal ulcers. The 92120 ZIP places this office on the Allied Gardens side of the Kaiser Zion complex, accessible from Waring Road via Zion Avenue and from the I-8 freeway at Fairmount Avenue. Prescriptions generated at the Zion optometry department route to the on-campus Pharmacy at Kaiser Permanente Vandever Medical Offices for same-system fulfillment of medicated drops and oral therapeutics. Open-angle glaucoma patients on prostaglandin analog drops return for pressure checks at 90-day intervals, with visual field mapping repeated annually to detect progression.