merge_icd9_dx_and_procs: Merge ICD-9-CM diagnostic and procedure codes
In medicalrisk: Medical Risk and Comorbidity Tools for ICD-9-CM Data

Description Usage Arguments Value Examples

Merges a dataframe containing ICD-9-CM diagostic codes with a dataframe containing ICD-9 procedure codes Diagnostic codes are prefixed with 'D', while procedure codes are prefixed with 'P'

merge_icd9_dx_and_procs(
  dx_df,
  proc_df,
  icd9dxvar = "icd9cm",
  icd9pvar = "icd9cm"
)

`dx_df`	a data frame with at least two columns, specified as `idvar` and `icd9dxvar`, where the values are ICD-9 diagnostic codes
`proc_df`	a data frame with at least two columns, specified as `idvar` and `icd9pvar`, where the values are ICD-9 procedure codes
`icd9dxvar`	name of icd9 diagnostic code column, default "icd9cm"
`icd9pvar`	name of icd9 procedure code column, default "icd9cm"

a merged dataframe with common columns and "icd9cm"

cases <- data.frame(id=c(1,2),
                    icd9dxlist=c('162.4,070.30,155.0,401.9','996.52,E878.8,V45.86'),
                    icd9plist=c('38.16','38.42'),
                    stringsAsFactors=TRUE)
dx_df <- melt_icd9list(cases, "id", "icd9dxlist")
proc_df <- melt_icd9list(cases, "id", "icd9plist")
merge_icd9_dx_and_procs(dx_df, proc_df)