Occupational medicine practice under a Doctor of Osteopathic Medicine degree lists Dr. Minh Q. Nguyen at the former US Healthworks clinic address of 3930 Fourth Ave Suite 200 in 92103. The US Healthworks network was rebranded under Concentra after the 2018 Select Medical acquisition, consolidating employer-contracted injury care, DOT physicals, and workers' compensation evaluations across the San Diego market. Typical presenting cases at this clinic address covered post-accident injury evaluation, drug-screen collection, pre-employment physicals, and return-to-work clearances coordinated directly with employer human resources departments. Post-injury rehabilitation for strains, sprains, and repetitive-motion diagnoses routinely handed off to Spine & Sport Physical Therapy - Hillcrest, 5th Ave. for follow-up under workers' compensation authorizations. The most technical evaluations at this clinic involved DOT commercial driver medical exams under 49 CFR Part 391 with complex findings requiring medical examiner documentation to the FMCSA National Registry of Certified Medical Examiners.