Table 1:

Diagnosis Codes Related to GH Infection; International Classification of Disease Ninth and Tenth Revisions (ICD-9 and ICD-10)

	Code	Version
Panel A: Codes Used to Identify Initial and Subsequent Visits
Visits related to treatment of GH
Genital herpes, unspecified	054.1	ICD-9
Genital herpes, genitalia and urogenital tract	A60.0	ICD-10
Herpes viral infection of perianal skin and rectum	A60.1	ICD-10
Anogenital herpes viral infection unspecified	A60.9	ICD-10
Visits related to treatment of sequelae of GH
Herpetic meningoencephalitis	054.3	ICD-9
Herpes simplex with unspecified ophthalmic complications	054.4	ICD-9
Herpetic septicemia	054.5	ICD-9
Herpes viral meningitis	B00.3	ICD-10
Herpes viral encephalitis	B00.4	ICD-10
Herpes viral ocular disease	B00.5	ICD-10
Disseminated herpes viral disease	B00.7	ICD-10
Panel B: Additional Codes Used to Identify Subsequent Visits
Herpes simplex with other specified complications	054.7	ICD-9
Herpes simplex with unspecified complication	054.8	ICD-9
Herpes simplex without mention of complication	054.9	ICD-9
Herpes viral vesicular dermatitis	B00.1	ICD-10
Other forms of herpes viral infection	B00.8	ICD-10
Herpes viral infection, unspecified	B00.9	ICD-10

Note: People with diagnosis codes before October 1, 2015 received an ICD-9 diagnosis and those after October 1, 2015 received an ICD-10 diagnosis. Codes listed in this table were inclusive of all sub-codes. For example, 054.4 included 054.40, 054.41 and 054.49. To be retained in our sample, a person needed to have an initial GH diagnosis beginning with one of the codes listed in Panel A. For those people, any future claims were considered subsequent GH-related clinical visits if they were recorded using a diagnosis code beginning with any of the codes listed in Panel A or Panel B. People with obstetrical diagnosis codes were excluded so as not to conflate costs associated with the treatment of GH with costs associated with the prevention of neonatal herpes.