DAVID TIERSTEN, M.D.

David Tiersten, M.D., provides specialized medical services through an independent physician practice focused on clinical care delivery in outpatient settings. As a licensed physician operating under NAICS 621111, the contractor delivers direct patient care services consistent with standard office-based medical practice, excluding mental health specialties. Their technical expertise lies in primary and specialty clinical evaluation, diagnostic assessment, and longitudinal patient management within a private practice model. The contractor’s differentiation stems from individualized, physician-led care delivery grounded in clinical judgment and evidence-based medicine, with no reliance on institutional infrastructure or team-based service models. The contractor’s sole known engagement was with the Social Security Administration, where the work involved administrative support related to a Blanket Purchase Agreement, ultimately closed due to the physician’s retirement. This interaction suggests limited, non-clinical coordination with federal agencies—likely related to medical documentation, disability evaluation support, or administrative compliance—rather than direct service provision to SSA beneficiaries. The primary industry focus is on physician office services, which encompasses diagnosis, treatment, and preventive care for non-mental health conditions in ambulatory settings. The contractor’s market positioning is that of an independent, solo-practicing clinician serving the local New York healthcare ecosystem, with no indication of participation in federal procurement programs beyond this single administrative transaction. The entity is structured as a sole proprietorship (2J), with no federal certifications or formal business accreditations on record. Geographically, operations are centered in New York, NY, with no evidence of multi-state or institutional presence. The contractor’s government market footprint is minimal and transactional, reflecting an individual practitioner’s occasional alignment with federal administrative needs rather than a sustained contracting presence.