TABLE 3.

Estimated total annual cost of visits in millions of dollars, by insurance source, to doctor’s offices, outpatient clinics, and emergency departments involving keratitis-related diagnostic codes — United States, 2010^*

	Insurance source (millions of $)
Diagnosis	Private	Medicare	Medicaid	Other†	Total
Corneal disorder due to contact lens (ICD-9-CM code 371.82)	21.5	3.9	4.6	3.6	33.5
Keratitis (370.0, 370.8, 370.9)	62.5	49.3	5.4	18.0	135.3
Any contact lens or keratitis related diagnosis (371.82, 370.0, 370.8, 370.9)§	83.8	58.0	11.9	21.2	174.9

Abbreviation: ICD-9-CM = International Classification of Diseases, Ninth Revision, Clinical Modification.

^*Sources: 2006–2010 National Ambulatory Medical Care Survey/National Hospital Ambulatory Care Medical Survey of Outpatient Departments, 2010 Nationwide Emergency Department Sample, and 2010 Marketscan Commercial Claims and Encounters, Medicare Supplemental and Multistate Medicaid databases.

^†Includes patients with other types of insurance (e.g., Tricare, the military health plan), uninsured patients, and patients with an unknown source of insurance.

^§The amount for any diagnosis does not equal the sum of visits with a corneal disorder caused by contact lens use diagnosis and visits with a keratitis diagnosis because approximately 1% of office visits and 4% of emergency department visits involved both categories of diagnosis codes.