OIG RAT-STATS
OIG statistical software used for sampling and estimating improper payments or overpayments.
- Sample-size determination
- Random sample selection
- Statistical estimation
Compliance Resources
Audit Tools
Government tools and databases that support sampling, coding validation, coverage review, exclusion screening, and risk assessment.
Reference standard: Confirm the current effective date and applicability of each source before relying on it for an audit finding, coding decision, provider education, or compliance determination.
Medicare NCCI Files
CMS edit files and manuals supporting correct-coding review.
- PTP files
- MUE files
- Policy manual
Medicare Coverage Database
Searchable Medicare coverage and policy database for audit validation.
- LCD/NCD search
- Articles
- Archived policies
OIG Exclusions Database
Screen individuals and entities against the federal exclusions list.
- LEIE search
- Verification documentation
OIG Work Plan
Current and planned OIG oversight projects that may identify emerging audit and compliance risk.
- Active work-plan items
- Recently added items
- Archived items