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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2017
Accounting Policies [Abstract]  
Schedule of Net Revenue by Service Line

The following table summarizes the Company’s net revenue by service line (in percentages):

 

     Years Ended December 31,  
     2017     2016     2015  

Anesthesiology

      38 %      39 %      37 % 

Neonatology and other pediatric subspecialties

      37 %      39 %      44 % 

Maternal-fetal medicine

      8 %      8 %      9 % 

Radiology and teleradiology

      8 %      6 %      4 % 

Management services

      6 %      5 %      2 % 

Pediatric cardiology

      3 %      3 %      4 % 
  

 

 

    

 

 

    

 

 

  
     100 %      100 %      100 %