• Neha Mukherjee, Roy Lee, Nhat Ngyuen, Nina Bickell, Lynne D Richardson, and Ka Ming Ngai.
• Mount Sinai Health System/Icahn School of Medicine at Mount Sinai, New York City, NY, USA. Neha.mukherjee@icahn.mssm.edu.
• J Gen Intern Med. 2025 Jan 28.

BackgroundOver 60 million patients in the USA have limited English proficiency (LEP) and experience barriers in care. Still, there exists no standardized method of monitoring the utilization of language interpreting services (LIS).ObjectiveTo introduce a methodological approach to systematically monitor utilization of LIS for LEP patients.DesignWe utilized a One-To-Many Match algorithm to align inpatient visits of LEP patients from the electronic health record (EHR) with corresponding calls from LIS billing logs, using a unique patient identifier (MRN) and LIS call dates within patient's admit and discharge dates. Due to error when MRNs are recorded by LIS, the FuzzyWuzzy Probabilistic String-Matching technique was utilized to enhance match accuracy where exact matches were unattainable, addressing inherent complexities in language data matching.ParticipantsThe study involved 5823 inpatient encounters with a non-English preference in an urban hospital system in 2020, representing a linguistically diverse patient base, and attempted to match these against 183,655 LIS call logs.Main MeasuresOur approach successfully matched 83.1% (4389 out of 5823) of inpatient encounters to an LIS call.Key ResultsWe observed significant language-specific disparities in LIS usage, with Spanish leading in call volume at 2737 calls (exact matches) and 845 (probabilistic matches). Concordance rates varied, exceeding 94% for all languages in exact matches and ranging from 53.9% for Arabic to 71.6% for Russian in probabilistic matches. The average frequency of LIS calls was about one call per day per language group in the inpatient setting.ConclusionsThe study provides vital insights into language service preferences, frequency, and duration. These findings emphasize the need for standard methods in monitoring LIS usage to enhance patient outcomes for LEP patients.© 2025. The Author(s), under exclusive licence to Society of General Internal Medicine.

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