Lazaros Xanthopoulos

Lazaros Xanthopoulos, a sole proprietorship based in Nashua, New Hampshire, provides independent medical case reviews and regional medical consultant services to the Social Security Administration as a full-and-open prime contractor, with no set-aside designations across its federal footprint. The vendor operates exclusively under the Social Security Administration's Regional Medical Consultant (RMC) blanket purchase agreements, conducting disability claim file reviews to support the agency's disability adjudication process across Region 1 (Boston area).

Xanthopoulos holds a single-award BPA valued at $2,149,000 effective through March 31, 2029, under which the SSA issues firm fixed-price call orders for case review work. Recent representative awards include a $68,425 BPA call issued July 1, 2026, for medical consultant services through June 30, 2027; a $19,550 call order from April 2026 for 200 independent case reviews; a $23,687.50 call order from September 2025 for 50 independent medical case reviews; and a $61,587.50 call order from April 2025 for case review work through March 31, 2026. All work is performed in Nashua, New Hampshire, with expertise focused on physical medicine and disability evaluation support. The vendor has maintained consistent engagement with SSA since SAM.gov registration in October 2014, with prior call orders ranging from $1,750 to $61,587.50 and case review volumes spanning 50 to 700 files per order.

Customer concentration is absolute—100% of 25 awards and $4 million in combined potential value derive from the Social Security Administration. The vendor places task orders against three named BPA vehicles: Blanket Purchase Agreement SS01154C001 (9 task orders, $228 thousand combined potential value), Blanket Purchase Agreement 28321319AC0140005 (8 task orders, $286 thousand combined potential value), and Blanket Purchase Agreement 28321324AC0140016 (5 task orders, $215 thousand combined potential value). Awards are categorized under NAICS 5411 (Offices of Physicians) with primary PSC coding for Medical/Psychiatric Consultation and Physical Medicine/Rehabilitation services. Activity has remained steady at two to three awards per year since 2022, with only one award—valued at $68 thousand—reaching ultimate completion within the next twenty-four months, indicating minimal near-term recompete exposure. Obligated dollars stand at $729 thousand against $4 million in potential value, reflecting the firm fixed-price structure of individual call orders issued as work is requested against the base BPA.