Montefiore Health System, the large integrated academic medical center anchoring the Bronx borough of New York City, laid off twelve utilization review registered nurses by July 12, 2026, replacing their clinical review functions with Datavant AI software — a health-data platform originally designed for de-identification and insurance linkage. The layoffs, first reported by Bloomberg Law on July 17, mark what the New York State Nurses Association (NYSNA) is calling the first documented case in the United States of licensed registered nursing roles being explicitly replaced by artificial intelligence software at a major hospital system.
Utilization review nurses occupy a specialized and largely invisible role within hospital operations: they assess the medical necessity of inpatient admissions, continued stays, procedures, and discharge planning on behalf of both the hospital and payors, mediating between clinical teams and insurance companies to ensure patients receive covered care and hospitals avoid payer denials. The work requires clinical judgment, knowledge of ICD-10 coding logic, payer-specific criteria (Milliman, InterQual), and real-time communication with attending physicians. It is documentation-heavy, criteria-driven — and those attributes have made utilization review one of the first clinical functions targeted by AI automation vendors.
NYSNA filed a class-action grievance against Montefiore on June 1, 2026 — before the final layoffs were completed — alleging the AI replacement violated the terms of the contract ratified in February 2026. That contract, covering NYSNA-represented nurses at Montefiore and two other major New York City hospital systems (NewYork-Presbyterian and Mount Sinai), was signed after the largest private-sector nurses’ strike in New York history, which began January 12, 2026. The NYSNA grievance specifically cites successor and work-assignment clauses that the union argues prohibit the hospital from contracting out or automating bargaining-unit work without negotiating over the decision and its effects.
Montefiore has not publicly confirmed the layoff count or acknowledged the Datavant deployment in response to media requests. The hospital system, which operates 11 hospitals and more than 200 outpatient care sites in the Bronx, Westchester, and the Hudson Valley, reported significant financial losses through 2025 amid the aftermath of the January strike and broader post-pandemic margin compression. The adoption of AI review tools is consistent with a cost-reduction strategy pursued by several major health systems nationally, though Montefiore’s case is the first where a union has alleged the displacement of actively employed licensed nurses was a contract violation rather than an attrition-based transition.
Utilization review is among the most replicable nursing functions from an AI vendor’s perspective: it involves criteria-based decision trees, structured documentation, and comparisons against payor databases — all things language models and criteria-matching algorithms can handle mechanically. The NYSNA grievance argues that “mechanically replicable” is not the same as “legally reassignable outside the bargaining unit,” and the outcome of that grievance will likely set a precedent. If arbitrators side with the union, hospitals will face a higher contractual bar before displacing UR nurses with AI. If arbitrators side with Montefiore, the door to similar moves at other union hospitals opens considerably wider. Nurses in UR, case management, and related administrative-clinical roles should watch this case closely — it is the first test of whether collective bargaining agreements limit AI displacement of licensed clinical staff.
The broader context matters. Datavant, the vendor named in the NYSNA grievance, is a health data interoperability and de-identification platform that has been expanding into AI-assisted clinical review functions since 2024. Datavant is one of several vendors — alongside Cohere Health, Utilization Management.ai, and Olive AI (pre-bankruptcy) — offering AI-augmented or AI-replacing utilization review tools to hospital systems under cost-reduction pressure. Industry projections suggest that AI-augmented UR can reduce labor costs in that function by 30–60% over a full implementation cycle. Montefiore appears to have chosen full replacement, not augmentation, for at least the twelve positions covered by the grievance.
NYSNA has not disclosed whether it will pursue arbitration, a ULP charge before the National Labor Relations Board, or both. The union’s statement described the layoffs as “an unprecedented attack on the nursing profession” and called for immediate reinstatement of the twelve affected nurses. The hospital has not issued a public response as of July 18, 2026.