Winmar Diagnostics North Central Inc.

Winmar Diagnostics North Central Inc., doing business as Winmar Sleep Clinic, provides polysomnography testing and home sleep apnea diagnostic services to the Indian Health Service as a prime contractor under Total Small Business set-asides. The company is a for-profit, small-business-certified diagnostic services provider based in Fargo, North Dakota, operating exclusively under NAICS 621498 (All Other Outpatient Care Centers) and carrying primary PSC codes for medical evaluation, screening, and reference laboratory testing.

Winmar Sleep Clinic's federal footprint concentrates entirely on a single customer and single facility. The Indian Health Service accounts for 34 awards (94% coverage) with $1.9 million combined potential value, and all recent work serves the Quentin N. Burdick Memorial Health Care Facility in Belcourt, North Dakota, on the Turtle Mountain Indian Reservation. The vendor operates under a single parent IDV — Indefinite Delivery Contract HHSI241201500033I — which carries 17 task orders totaling $392 thousand in combined potential value.

Recent representative work includes a five-year firm-fixed-price purchase order awarded July 6, 2026, valued at $449 thousand ceiling, covering 70 in-lab polysomnography studies and 130 home sleep studies annually through July 5, 2031 with four optional one-year renewal periods; a modification awarded August 1, 2025, adding $29,855 for additional sleep studies (completion March 5, 2026); and a purchase order awarded December 9, 2024, for $28,485 covering sleep testing services for the facility's respiratory department (completion June 10, 2025). All pricing is firm-fixed and all-inclusive, with Winmar supplying equipment, supplies, certified respiratory therapists or polysomnography technicians, and board-certified sleep specialists for test interpretation.

Activity remains sparse and flat — one award per year in 2023, 2025, and 2026, with two in 2024 — across a portfolio spanning sixteen years of intermittent task orders. Combined obligated dollars total $968 thousand against $1.9 million in combined potential value, a 50% obligation rate typical of ongoing indefinite delivery vehicles with remaining option periods. The vendor operates no subcontract business and maintains zero diversification beyond IHS, creating both customer concentration risk and stable-if-narrow repeat-order exposure within the Indian Health Service's tribal healthcare system.