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. Author manuscript; available in PMC: 2013 Oct 1.
Published in final edited form as: Med Care. 2012 Oct;50(10):843–848. doi: 10.1097/MLR.0b013e31825f2864

Table 2B.

Distribution of Patients with Bipolar Disorder by Practice Size

Size of Practices Providing Care for Patients with Bipolar Disorder Number of Patients Treated for Bipolar Disorder Seen in a Given Practice Venue Size (%)c Average Bipolar Patient Censusd
Single Independent Psychiatristb 20,203 (94.4%) 3.5
Single Psychiatrist Registered as Groupb 111 (0.5%) 1.3
Group Practice with 2-3 Psychiatrists 207 (1.0%) 2.3
Group Practice with 4-10 Psychiatrists 329 (1.5%) 2.0
Group Practice with 11-20 Psychiatrists 225 (1.1%) 2.4
Group Practice with 21-100 Psychiatrists 318 (1.5%) 4.5
Group Practice with >100 Psychiatrists 18 (0.1%) 18.0
Total Number of Patients Receiving Care 21,411 (100.0%) not applicable
a

Based on analysis of 6,757 unique psychiatrists treating individuals with bipolar disorder; 551 (8.2%) of psychiatrists were represented under more than one tax identification number or practice.

b

Individual providers could register with Aetna either as an independent practitioner or as a group at their own discretion.

c

Based on analysis of 20,933 unique patients treated for bipolar disorder; 1,675 (0.8%) received care in more than one venue.

d

Average Bipolar Patient Census = number of patients divided by number of practices of a given size (from Table 2A).