AOP WEBWORLD PRIVATE LIMITED AOP Training Institute is a reputed centre to learn medical coding and billing program. AOP is known for offering 100 percent job assurance and certified training to aspiring professionals in the healthcare industry. AOP provides training to students on various aspects related to billing and coding terms that include CPT coding, ICD-9 and ICD-10 coding systems, spreadsheet, coding software,  terms, database management software and pharmacology fundamentals. AOP instructors and coaches have got all the necessary certifications in medical billing, coding and credentialing. They are the members of AHIMA and  AAPC.