David E. Duffy, PhD holds California psychology license PSY19177 and practices clinical psychology from Center Drive in La Mesa's Grossmont medical corridor, affiliated with Memory Check Psychological Services, a single-specialty psychology corporation. NPI 1326244955 reflects a clinical focus on geropsychological assessment and mood disorders, and the practice's position inside the Grossmont Post Acute Care campus connects it to post-acute providers such as Arbor Hills Nursing Center for cognitive-decline evaluations. Medicare-enrolled since graduating in 1999, the practice addresses depression in older adults, seasonal affective disorder, postpartum depression, and acute mental-health crises requiring rapid diagnostic triage. Neuropsychological screening results feed into multidisciplinary treatment plans that may include rehabilitation-focused providers like Rehabilitation Strategies for patients recovering from stroke or traumatic brain injury. Highest-demand assessments involve full psychodiagnostic batteries combining the Wechsler Adult Intelligence Scale, Trail Making Tests, and dementia-screening protocols for patients in skilled-nursing and post-acute rehabilitation settings.