UC San Diego Health's Hillcrest internal medicine clinic operates inside the 330 Lewis Street medical office building, handling adult primary and continuity care for the academic health system's central San Diego patient panel. The clinic sits inside the UC San Diego Health 4th & Lewis Medical Offices, which also houses mammography, lab services, and multiple subspecialty clinics on adjacent floors for same-building referral flow. Adult internal medicine visits cover annual physicals, long-term medication management, chronic disease programs for diabetes and hypertension, and preventive screening coordination. Patients presenting with sleep-disordered breathing, chronic cough, or suspected obstructive sleep apnea often route workups to the UCSD Hillcrest Pulmonary and Sleep Research Laboratory for in-lab polysomnography and pulmonary function testing. The clinic also functions as a teaching site for UCSD internal medicine residents, meaning visits frequently pair a resident physician with a supervising faculty attending. Medically complex inpatient transitions — post-discharge medication reconciliation after ICU stays, oncology follow-up handoffs, post-transplant monitoring — run through this clinic as the outpatient continuity home for UCSD Hillcrest Medical Center admissions.