Mon-Vale Primary Care Practices Welcomes Michael Wald,M.D to the Monongahela Valley Hospital Outpatient Center California Putting your health first. Mon-Vále Primary Care Practices, Inc. HEALTH CARE 371 Skyline Drive, California, PA 15419 724-648-3863 Office hours: Mon., Tues., Thurs., Fri.7 a.m. 5 p.m. Now Scheduling Appointments.