Table 1.

Twenty most common reasons^a for adult emergency department (ED) treat-and-release visits^b that were followed by a stroke admission within 30 days, 2009.

	Clinical Classification Software label: description	Frequency
1	109: Acute cerebrovascular disease	4439
2	84: Headache; including migraine	1450
3	112: Transient cerebral ischemia	1339
4	239: Superficial injury; contusion	1003
5	93: Conditions associated with dizziness or vertigo	984
6	95: Other nervous system disorders	982
7	102: Nonspecific chest pain	940
8	98: Essential hypertension	775
9	252: Malaise and fatigue	768
10	259: Residual codes; unclassified	749
11	211: Other connective tissue disease	717
12	205: Spondylosis; intervertebral disc disorders; other back problems	677
13	251: Abdominal pain	647
14	159: Urinary tract infections	611
15	244: Other injuries and conditions due to external causes	509
6	232: Sprains and strains	487
17	245:Syncope	477
18	133: Other lower respiratory disease	439
19	250: Nausea and vomiting	344
20	127: Chronic obstructive pulmonary disease and bronchiectasis	341
76	94: Other ear and sense organ disorders	52
	All other codes	9518
	Total	28,248

^aAlso shown is category ‘94′ – the only dizziness or headache category that was not already listed in the top 20 (i.e., 84 and 93). Together, 93 and 94 make up ‘dizziness.’

^bThis is a visit-level analysis, so counts include multiple ED visits by a single person.