Medicaid Provider Spending

This dataset contains provider-level Medicaid spending data aggregated from outpatient and professional claims with valid HCPCS codes, covering January 2018 through December 2024. It provides insights into how Medicaid dollars are distributed across providers and procedures nationwide.

Data Description

Attribute	Value
Time Period	January 2018 - December 2024
Granularity	Provider (NPI) × HCPCS Code × Month
Geographic Scope	National (all states and territories)
Coverage	Fee-for-service, managed care, and CHIP

This dataset aggregates individual claims to the provider-procedure-month level, providing counts of beneficiaries served, claims submitted, and total amounts paid by Medicaid.

Use Cases

Provider spending analysis: Identify top Medicaid providers by total spending or volume
Procedure utilization trends: Track how utilization of specific procedures changes over time
Geographic comparisons: Compare provider spending patterns across states
Outlier detection: Identify unusual billing patterns for further investigation
Policy research: Analyze the impact of policy changes on Medicaid spending

About T-MSIS

The Transformed Medicaid Statistical Information System (T-MSIS) is CMS's comprehensive data system for collecting Medicaid and CHIP data from all 50 states, the District of Columbia, and US territories.

T-MSIS data is submitted monthly by states to CMS and includes information on:

Beneficiary enrollment and eligibility
Fee-for-service claims
Managed care encounter data
Provider information

Cell Suppression Methodology

To protect beneficiary privacy, this dataset applies cell suppression:

Threshold: Rows with fewer than 12 total claims are dropped entirely
Purpose: Prevents re-identification of individuals who received uncommon procedures or visited low-volume providers

This means the dataset represents the majority of Medicaid spending but excludes low-volume provider-procedure combinations.

Data Accuracy

This data is derived from T-MSIS submissions and is only as accurate as the data submitted by each state. State Medicaid agencies should be considered the authoritative source for all provider and claims data. T-MSIS has known data quality issues that vary by state and data element. For detailed information on data quality concerns, refer to CMS's DQ Atlas.