Jeff Z Zhang

Jeff Z Zhang, doing business as Advanced Orthopedic Consultation, is a sole proprietorship based in Perry Hall, Maryland that provides independent medical case reviews and disability claim file assessments to the Social Security Administration as a prime contractor under the Headquarters Medical Consultants BPA. The vendor operates exclusively as a small business and competes on full-and-open vehicles with no set-aside designation, though one recent 2026 BPA call carries a Total Small Business set-aside.

Advanced Orthopedic Consultation's federal footprint is highly concentrated — all seven awards in the source span a single customer, the Social Security Administration, across a single parent vehicle, BPA 28321321AC0040060. The vendor performs independent reviews of disability claim case files and related medical consultation hours in support of the SSA's Office of Disability Determinations and Office of Medical Assistance, with work performed in Perry Hall, Maryland and at SSA headquarters in Baltimore, Maryland. Recent representative awards include a $223,730 Total Small Business BPA call issued May 28, 2026 running through May 31, 2028 for independent case reviews and non-case hours; a $224,360 full-and-open BPA call from June 1, 2025 through May 31, 2026 for medical consultant services; and a $222,060 full-and-open BPA call awarded May 28, 2024 for 2,200 independent case reviews and 10 hours of related services. Earlier calls valued between $98,855 and $249,789 date to 2021–2022.

Activity is episodic — one award per year from 2022 through 2026 — with combined potential value of $4.3 million across all seven awards. Obligated spend across the portfolio sits at $1.2 million (29% of potential). One award carrying $224 thousand in potential value reaches ultimate completion inside the next twenty-four months and faces recompete exposure. The vendor holds no subcontract work and operates entirely in prime capacity. NAICS concentration aligns with the medical-services scope: all seven awards fall under Offices of Physicians (except Mental Health Specialists), with four awards classified under PSC Medical- Medical/Psychiatric Consultation and three under PSC Medical- Other.