The Hemorrhoid Institute is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Physicians & Surgeons Gastroenterology
• Physicians & Surgeons Hand Surgery
• Physicians & Surgeons Physicians Assistant

North American Industry Classification System (NAICS) Categories:

• Offices Of Physicians (Except Mental Health Specialists) > Physicians & Surgeons Abdominal & Gastroenterology > Physicians & Surgeons Gastroenterology
• Offices Of Physicians (Except Mental Health Specialists) > Physicians & Surgeons General Surgery > Physicians & Surgeons Hand Surgery
• Offices Of All Other Miscellaneous Health Practitioners > Nurses & Other Medical Assistants > Physicians & Surgeons Certified Assistants

Standard Industry Classification (SIC) Categories:

• Offices And Clinics Of Doctors Of Medicine > Physicians & Surgeons Abdominal & Gastroenterology > Physicians & Surgeons Gastroenterology
• Offices And Clinics Of Doctors Of Medicine > Physicians & Surgeons General Surgery > Physicians & Surgeons Hand Surgery
• Offices And Clinics Of Health Practitioners, Nec > Nurses & Other Medical Assistants > Physicians & Surgeons Certified Assistants