[[.comorbidity_map      Extract vector of codes from an ICD comorbidity
                        map
as.decimal_diag         Get or set whether ICD codes have have an
                        attribute indicating 'short' or 'decimal'
                        format
as.icd_long_data        Convert between and identify 'long' and 'wide'
                        patient data formats
categorize_simple       Categorize codes according to a mapping
charlson                Calculate Charlson Comorbidity Index (Charlson
                        Score)
charlson_from_comorbid
                        Calculate Charlson scores from precomputed
                        Charlson comorbidities
children                Get children of ICD codes
combine                 combine ICD codes
comorbid                Find comorbidities from ICD-9 codes.
comorbid_df_to_mat      convert comorbidity matrix to data frame
comorbid_hcc            Get Hierarchical Condition Codes (HCC)
comorbid_mat_to_df      convert comorbidity data frame from matrix
comorbid_pccc_dx        Calculate pediatric complex chronic conditions
                        (PCCC) comorbidities
convert                 Convert ICD9 codes between formats and
                        structures.
count_codes             Count ICD codes or comorbidities for each
                        patient
count_codes_wide        Count ICD codes given in wide format
count_comorbid          Count number of comorbidities per patient
diff_comorbid           show the difference between two comorbidity
                        mappings
filter_poa              Filters data frame based on present-on-arrival
                        flag
filter_valid            Filter ICD codes by validity.
get_defined             Select only defined ICD codes
icd-package             icd: Comorbidity Calculations and Tools for
                        ICD-9 and ICD-10 Codes
icd10_chapters          ICD-10 chapters
icd10_map_ahrq_pcs      AHRQ ICD-10-PCS categories
icd10_pcs               ICD-10-CM Procedure Codes
icd10_sub_chapters      ICD-10 sub-chapters
icd10cm2016             ICD-10-CM
icd9_chapters           ICD-9 chapters
icd9_map_ahrq           AHRQ comorbidities
icd9_map_elix           Elixhauser comorbidities
icd9_map_hcc            Medicare Hierarchical Condition Categories
icd9_map_pccc           Pediatric Complex Chronic Conditions
icd9_map_quan_deyo      Quan adaptation of Deyo/Charlson comorbidities
icd9_map_quan_elix      Quan adaptation of Elixhauser comorbidities
icd9_map_single_ccs     Clinical Classifications Software (CCS) for
                        ICD9/10-CM
icd9cm_billable         list of annual versions of billable leaf nodes
                        of ICD-9-CM
icd9cm_hierarchy        Latest ICD-9-CM diagnosis codes, in flat
                        'data.frame' format
is.icd9                 test ICD-related classes
long_to_wide            Convert ICD data from long to wide format
names_elix              Comorbidity names
poa_choices             Present-on-admission flags
print.comorbidity_map   Print a comorbidity map
subset_icd              extract subset from ICD data
unzip_single            unzip a single file from URL
uranium_pathology       United States Transuranium & Uranium Registries
van_walraven            Calculate van Walraven Elixhauser Score
vermont_dx              Hospital discharge data from Vermont
wide_to_long            Convert ICD data from wide to long format
