Table 6. Distribution of hospital outpatient department claims and charges, by type of service.

Type of service	Number of claims	Percentage of claims	Percentage of charges	Average charge1
Routine visits	48,610	10.3	5.3	$80.81
Emergency department visits	51,461	10.9	3.8	55.40
Consultations or specialty services	26,116	5.6	3.1	89.66
Other visits	1,755	0.4	0.3	121.99
Cataract-lens procedures	8,241	1.2	12.6	1,157.88
Other eye procedures	4,269	0.9	0.2	267.67
Other ambulatory procedures	6,048	1.3	2.8	356.70
Minor procedures	12,195	2.3	2.3	145.19
Major procedures	2,197	0.5	1.2	539.46
Endoscopy procedures	15,051	3.2	5.7	287.27
Imaging procedures	1,842	0.4	1.2	725.88
Advanced imaging	24,418	5.2	13.6	424.28
Standard imaging	116,035	24.7	16.4	107.66
Sonography	16,358	3.5	3.7	171.70
Oncology services	9,593	2.0	6.2	490.83
Dialysis services	1,151	0.2	2.3	21,508.20
Laboratory tests	99,180	21.1	12.4	95.28
Other tests	20,660	4.4	3.6	132.51
Other	4,806	1.0	1.2	190.84

¹All averages are claims-weighted.

²Analysis of claims data indicates that facilities report an average of 12 treatments per claim. If submitted separately, about 11,000 additional dialysis claims (about 2 percent of all claims) would be reported with an average charge of approximately $126.

SOURCES: Health Care Financing Administration: Hospital Outpatient Bill file and Part B Medicare Annual Data file, both 1987; data development by the Urban Institute.