ccsr_changelog: Get CCSR Change Log

In HCUPtools: Access and Work with HCUP Resources and Datasets

Get CCSR Change Log

Description

Retrieves and displays the change log for CCSR versions. The change log documents updates, additions, and modifications to CCSR categories across different versions.

Usage

ccsr_changelog(
  version = "latest",
  type = "diagnosis",
  format = "read",
  as_data_table = NULL
)

Arguments

version	Character string specifying the CCSR version. Use "latest" (default) to get the change log for the most recent version, or specify a version like "v2026.1", "v2025.1", etc.
type	Character string specifying the type of CCSR. Must be one of: "diagnosis" (or "dx") for ICD-10-CM diagnosis codes, or "procedure" (or "pr") for ICD-10-PCS procedure codes. Default is "diagnosis".
format	Character string specifying the output format. Options: "read" (default) - Downloads and reads the Excel file as a data table/tibble (requires readxl package) "text" - Returns change log information as text "url" - Returns the URL to the change log document "download" - Downloads and returns the change log file path "view" - Downloads and opens the change log file in the default viewer "extract" - Attempts to extract text from the file (requires pdftools for PDF or readxl for Excel)
as_data_table	Logical. If TRUE, returns a data.table instead of a tibble. Only used when format = "read". If NULL (default), prompts the user interactively to choose (only in interactive sessions). In non-interactive sessions, defaults to FALSE.

Details

CCSR change logs document:

• New CCSR categories added

• Categories that were removed or merged

• Changes to category descriptions

• Updates to ICD-10 code mappings

• Version-specific notes and improvements

Change logs are typically available as PDF or text documents on the HCUP website. This function attempts to locate and retrieve them.

Value

Depending on format:

• "read" (default): A tibble or data.table containing the change log data (if Excel file)

• "text": Character string with change log information

• "url": Character string with URL to change log

• "download": Character string with path to downloaded file

• "view": Opens the file and returns the file path (invisibly)

• "extract": Character string with extracted text from file

Examples

# Get latest change log URL
changelog_url <- ccsr_changelog(format = "url")

# Get change log information
changelog_info <- ccsr_changelog(version = "v2026.1", format = "text")

# Download change log file
changelog_file <- ccsr_changelog(version = "v2025.1", format = "download")

# View change log in default PDF viewer
ccsr_changelog(version = "v2026.1", format = "view")

# Extract text from change log PDF (requires pdftools package)
changelog_text <- ccsr_changelog(version = "v2026.1", format = "extract")
cat(changelog_text)

HCUPtools documentation built on July 13, 2026, 9:06 a.m.