Linda Royster Cook, AuD provides audiologic evaluations and hearing rehabilitation in San Diego's Allied Gardens neighborhood at the Kaiser Permanente Zion campus on Zion Avenue. Her NPI registration (1508914425) classifies her under the audiologist taxonomy for providers who conduct diagnostic hearing evaluations, hearing aid fittings, and auditory rehabilitation for patients with hearing loss and speech-language impairments. The campus at 4647 Zion Ave shares its referral infrastructure with the Kaiser Permanente Zion Medical Center departments in otolaryngology, primary care, and pediatrics, creating a closed-loop system where audiometric results feed directly into the patient's electronic health record. Cook's clinical scope covers pure-tone audiometry, tympanometry, otoacoustic emissions, and auditory brainstem response measurements used to map hearing thresholds across frequency bands. Hearing aid selection and fitting follow those diagnostic baselines, with real-ear measurement verification to confirm amplification targets match the patient's loss profile. Pediatric hearing evaluations represent a significant share of audiology referrals at the Zion campus, where newborn screening follow-ups and school-age hearing checks feed into early intervention pathways. Vestibular assessment, including videonystagmography and rotary chair testing, falls within the audiologist's scope when patients present with dizziness or balance dysfunction routed from the otolaryngology department. The Allied Gardens location sits directly off the Interstate 8 and Fairmount Avenue interchange in the 92120 ZIP code, anchoring the medical corridor that serves Grantville, Del Cerro, and San Carlos. Patients who require hearing devices beyond conventional amplification can pursue evaluation for bone-anchored hearing systems or cochlear implant candidacy, with surgical follow-through handled within the same Kaiser system. Independent hearing aid fitting and assistive device consultations outside the Kaiser network are available through Abbott Hearing Aid Centers in San Carlos along the Lake Murray Boulevard retail corridor. Cook's dual listing under speech pathology and audiology reflects a clinical background spanning both communicative rehabilitation and diagnostic hearing science.