Preferral Line

Preferral Line is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Physicians & Surgeon Information & Referral Service

North American Industry Classification System (NAICS) Categories:

• Offices Of Physicians (Except Mental Health Specialists) > Physicians & Surgeons Referrals & Information Services
• Offices Of Physicians, Mental Health Specialists > Physicians & Surgeons Referrals & Information Services

Standard Industry Classification (SIC) Categories:

• Offices And Clinics Of Doctors Of Medicine > Physicians & Surgeons Referrals & Information Service