Mascari Dinh Architects in downtown San Diego's Little Italy district operates from Columbia Street as a design studio specializing in healthcare architecture, planning, and interior environments for hospital systems across Southern California. The firm's healthcare portfolio includes the Loma Linda University Medical Center Pediatric Medical Office Building—a five-story, 105,000-square-foot facility with dedicated patient drop-off zones and site lighting—and the Huntington Health / Cedars-Sinai medical office building in Pasadena, a four-story, 100,285-square-foot structure with three levels of subterranean parking, projects whose MEP complexity parallels the institutional design work at DAHLIN Architecture | Planning | Interiors on West Broadway. USGBC membership informs the firm's sustainable-design protocols, integrating energy modeling and daylighting analysis into healthcare facilities where OSHPD (now HCAI) compliance adds layers of structural and mechanical review beyond standard commercial permitting. Mascari Dinh also designed the EmPATH (Emergency Psychiatric Assessment, Treatment & Healing) unit for Loma Linda University Health Hospitals, a behavioral-health environment requiring anti-ligature hardware, controlled sight lines, and calming interior material palettes that standard architectural specifications do not address. Electrical and mechanical systems in those clinical environments demand coordination with specialized engineering consultants at the level provided by C & G Engineering, Inc. on medical-grade power distribution and emergency backup systems. The firm's most complex healthcare builds involve ground-up medical office buildings exceeding 100,000 square feet with HCAI-reviewed structural systems, subterranean parking, and phased construction schedules that maintain adjacent hospital operations during buildout.