TABLE 2.
Estimated number of visits to doctor’s offices, outpatient clinics, and emergency departments for keratitis-related diagnostic codes — United States, 2010
| Diagnosis | No. of doctor’s office/Outpatient clinic visits* (95% CI) | No. of emergency department visits† (95% CI) |
|---|---|---|
| Corneal disorder due to contact lens (ICD-9-CM code 371.82) | 230,000 (130,000–340,000) | 19,000 (14,000–25,000) |
| Keratitis (370.0, 370.8, 370.9) | 700,000 (510,000–890,000) | 41,000 (30,000–52,000) |
| Corneal ulcer (370.0) | 280,000 (170,000–390,000) | 25,000 (18,000–33,000) |
| Other forms of keratitis (370.8) | —§ | 7,000 (3,000–12,000) |
| Unspecified keratitis (370.9) | 380,000 (250,000–520,000) | 8,000 (7,000–9,000) |
| Any contact lens or keratitis related diagnosis (371.82, 370.0, 370.8, 370.9) | 930,000 (690,000–1,170,000) | 58,000 (43,000–72,000) |
Abbreviations: ICD-9-CM = International Classification of Diseases, Ninth Revision, Clinical Modification; CI = confidence interval.
*
Source: 2006–2010 National Ambulatory Medical Care Survey/National Hospital Ambulatory Care Medical Survey of Outpatient Departments.
†
Source: 2010 Nationwide Emergency Department Sample.
§
Data not reported because of small sample size.