New York Codes, Rules and Regulations
Title 10 - DEPARTMENT OF HEALTH
Chapter V - Medical Facilities
Subchapter A - Medical Facilities-minimum Standards
Article 8 - New York State Annual Hospital Report
Part 441 - Definitions
Section 441.168 - Hospital-based physician

A physician who spends the predominant part of his practice time within one or more hospitals instead of in an office setting, or providing services to one or more hospitals or their patients. Such physicians have either a special financial arrangement with the hospital (salary or percentage of fees collected), or bill patients separately for their services. Such physicians include directors of medical education, pathologists, anesthesiologists and radiologists, as well as physicians who staff emergency rooms and outpatient departments.