#1 Medical billing and credentialing company in the tri-state New York area. WCH Service Bureau, Inc is a nationwide multi-service company. We specialize in medical billing, credentialing, chart auditing, software development, and other practice management services. For over 20 years, WCH has proudly served thousands of healthcare providers nationwide in New York, New Jersey, Pennsylvania, California, Delaware, and Florida. Our clients include private clinics, hospitals, laboratories, imaging centers, pharmacies, and supply companies. Here are five reasons why your practice should work with WCH: 1) Guaranteed reimbursement levels 2) Customized management solutions 3) Rigorous quality assurance 4) Highly trained professionals 5) Solid industry relationships