Clara Maass Medical Center is an OMNIA Tier 1 facility. RECENTLY NAMED: 2016 Best Renovated or Repurposed Healthcare Facility , this beautiful building is connected to the Clara Maass Hospital by an indoor pedestrian bridge, making it a great opportunity for any physician who visits the hospital. Located in Belleville, NJ, hugging the boarders of suburbia and the city, Clara Maass Medical Center is a community hospital that offers patients expert care in a technology-rich environment, close to home. Nicknamed Hospital in the Park , because if its close proximity to lovely Branch Brook Park, Clara Mass Medical Center is a 469 bed facility serving residents of Essex, Hudson and Bergan Counties.