Public audit ledger

Medicaid audit reports

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Evidence register

72 reports

Published
Jun 2026
Scope
Multi-jurisdiction
Source authority
Federal
Publishing agency
Office of Inspector General, U.S. Department of Health and Human Services
Report ID
REPORT 164
Examines
5 jurisdictions · Louisiana, Missouri + 3 more

Inaccurate Medicaid Managed Care Provider Directories May Limit Enrollees’ Access to Maternal Health Care

Online provider directories of Centene, Elevance, and UnitedHealthcare Medicaid plans in five States contained inaccuracies (ghost providers, missing in-network providers, and incorrect contact information) that may impede enrollees' access to maternal health care and distort…

Findings
4
Recommendations
2
Open evidence record
Source status
Original source
Published
Jun 2026
Scope
National
Source authority
Federal
Publishing agency
U.S. Department of Health and Human Services Office of Inspector General
Report ID
REPORT 160
Examines
National scope

CMS Should Improve Its Policies and Procedures for the Oversight of States’ Reported Medicaid Expenditures to Better Protect the Financial Integrity of the Medicaid Program

CMS did not consistently follow its policies and procedures for overseeing States’ CMS-64 expenditures and its processes for deferred payments and disallowed expenditures require improvements to protect Medicaid financial integrity.

Findings
3
Recommendations
4
Open evidence record
Source status
Original source
Published
Jun 2026
Scope
Multi-jurisdiction
Source authority
Federal
Publishing agency
U.S. Department of Health and Human Services, Office of Inspector General
Report ID
REPORT 163
Examines
5 jurisdictions · Louisiana, Missouri + 3 more

Inaccurate Medicaid Managed Care Network Lists May Compromise State Oversight of Access to Maternal Health Care

We found that the network lists from Centene, Elevance, and UnitedHealthcare Medicaid plans in five States contained inaccuracies—potential ghost providers who reported not being in-network, incorrect contact information, and discrepancies with online provider directories—that…

Findings
3
Recommendations
2
Open evidence record
Source status
Original source
Published
Jun 2026
Scope
Single jurisdiction
Source authority
Federal
Publishing agency
U.S. Department of Health and Human Services Office of Inspector General
Report ID
REPORT 165
Examines
North Dakota

North Dakota Could Better Ensure That Providers Fully Comply With Federal Waiver and State Health, Safety, and Administrative Requirements at 44 Residential Settings

The North Dakota State agency could improve oversight of residential providers and settings to better ensure the health and safety of participants with intellectual and developmental disabilities residing in residential habilitation settings; weaknesses in the quality manageme…

Findings
7
Recommendations
3
Open evidence record
Source status
Original source
Published
Jun 2026
Scope
Single jurisdiction
Source authority
Federal
Publishing agency
U.S. Department of Health and Human Services Office of Inspector General
Report ID
REPORT 162
Examines
California

California's Medicaid Reimbursements for Clinical Diagnostic Laboratory Services

The State agency did not always claim Federal Medicaid reimbursement for clinical diagnostic laboratory services in accordance with Federal and State requirements, resulting in overpayments totaling $13.9 million (Federal share) and potentially $29.3 million (Federal share not…

Findings
4
Recommendations
4
Open evidence record
Source status
Original source
Published
Jun 2026
Scope
Single jurisdiction
Source authority
Federal
Publishing agency
Office of Inspector General, U.S. Department of Health and Human Services
Report ID
REPORT 161
Examines
Pennsylvania

Medicaid Managed Care Behavioral Health Service Denials in Philadelphia by Community Behavioral Health

CBH did not comply with Federal and State requirements for denying prior-authorization behavioral health services; none of the 100 sampled denials complied with all applicable requirements, indicating potential systemic issues in denials and potential impact on enrollee rights.

Findings
5
Recommendations
6
Open evidence record
Source status
Original source
Published
Mar 2026
Scope
Single jurisdiction
Source authority
Federal
Publishing agency
Office of Inspector General, U.S. Department of Health and Human Services
Report ID
REPORT 159
Examines
Louisiana

Medicaid Managed Care Behavioral Health Services Denials in Louisiana

Because LHCC revised its internal policy during our audit period to ensure that written notices of adverse determinations were sent to enrollees regardless of the enrollees' inpatient status, and because we did not identify any additional concerns after the effective date of t…

Findings
5
Recommendations
0
Open evidence record
Source status
Original source
Published
Mar 2026
Scope
Single jurisdiction
Source authority
Federal
Publishing agency
U.S. Department of Health and Human Services Office of Inspector General
Report ID
REPORT 158
Examines
Michigan

Selected Diabetes and Weight Loss Drugs Were Dispensed to Michigan Medicaid Managed Care Enrollees in Accordance With Federal and State Requirements

Because the State agency ensured, for the sample items we reviewed, that the MCOs followed all outpatient prescription drug coverage and utilization requirements that were in place during our audit period, including prior authorizations and quantity limits, this report contain…

Findings
2
Recommendations
1
Open evidence record
Source status
Original source
Published
Feb 2026
Scope
Single jurisdiction
Source authority
Federal
Publishing agency
Office of Inspector General, U.S. Department of Health and Human Services
Report ID
REPORT 156
Examines
Missouri

Missouri Medicaid Rebates for Physician-Administered and Pharmacy Drugs

Although the State agency improved its controls over invoicing for rebates for physician-administered drugs, during our audit period the State agency did not comply with Federal Medicaid requirements for invoicing manufacturers for rebates for some physician-administered and p…

Findings
6
Recommendations
6
Open evidence record
Source status
Original source
Published
Feb 2026
Scope
Single jurisdiction
Source authority
Federal
Publishing agency
Department of Health and Human Services Office of Inspector General Office of Audit Services
Report ID
REPORT 157
Examines
Colorado

Colorado Made at Least $77.8 Million in Improper Fee-for-Service Medicaid Payments for Applied Behavior Analysis Provided to Children

Colorado’s FFS Medicaid payments for Applied Behavior Analysis provided to children did not fully comply with Federal and State requirements, resulting in improper and potentially improper payments and highlighting a need for stronger governance, oversight, and guidance to pre…

Findings
7
Recommendations
5
Open evidence record
Source status
Original source
Published
Feb 2026
Scope
Single jurisdiction
Source authority
Federal
Publishing agency
Office of Inspector General, U.S. Department of Health and Human Services
Report ID
REPORT 155
Examines
West Virginia

West Virginia Medicaid Managed-Care Rebates Associated With Physician-Administered Drugs

The Office of Inspector General found that West Virginia did not invoice manufacturers for some rebates due on physician-administered drugs dispensed to enrollees of Medicaid managed-care organizations during the audit period, totaling $8.2 million ($6.1 million Federal share)…

Findings
3
Recommendations
2
Open evidence record
Source status
Original source
Published
Jan 2026
Scope
Single jurisdiction
Source authority
Federal
Publishing agency
United States Department of Health and Human Services Office of Inspector General Office of Audit Services
Report ID
REPORT 154
Examines
Maine

Maine Made at Least $45.6 Million in Improper Fee-for-Service Medicaid Payments for Rehabilitative and Community Support Services Provided to Children Diagnosed With Autism

For our audit period, the Maine Department of Health and Human Services’s FFS Medicaid payments for rehabilitative and community support services provided to children diagnosed with autism included improper and potentially improper payments. Improper payments totaled at least…

Findings
7
Recommendations
4
Open evidence record
Source status
Original source
Published
Dec 2025
Scope
Single jurisdiction
Source authority
Federal
Publishing agency
U.S. Department of Health and Human Services, Office of Inspector General
Report ID
REPORT 119
Examines
Illinois

Illinois Medicaid Managed Care Capitation Payments for Incarcerated Enrollees

The audit determined that Illinois made unallowable managed care capitation payments for incarcerated enrollees during the audit period, totaling at least $9.5 million with $8.3 million Federal share, and identified failures to terminate enrollment as required. Recovered findi…

Findings
3
Recommendations
2
Open evidence record
Source status
Original source
Published
Dec 2025
Scope
National
Source authority
Federal
Publishing agency
U.S. Department of Health and Human Services, Office of Inspector General
Report ID
REPORT 118
Examines
National scope

Medicaid Agencies Made Millions in Unallowable Capitation Payments to Managed Care Organizations on Behalf of Deceased Enrollees

We estimate that Medicaid agencies made $207,501,380 ($138,645,710 Federal share) in unallowable capitation payments to MCOs for deceased enrollees during the audit period (July 1, 2021 – June 30, 2022).

Findings
4
Recommendations
2
Open evidence record
Source status
Original source
Published
Sep 2025
Scope
National
Source authority
Federal
Publishing agency
Office of Inspector General, U.S. Department of Health and Human Services
Report ID
REPORT 168
Examines
National scope

Most Children Enrolled in Medicaid Did Not Receive Timely Suicide-Related Followup Care

Timely followup care after pediatric suicidal thoughts or behaviors is not consistently achieved across states; about half of cases did not have a followup visit within 7 days and 21 percent had none within 60 days; shortages of behavioral health providers and difficulties con…

Findings
5
Recommendations
2
Open evidence record
Source status
Original source
Published
Sep 2025
Scope
Single jurisdiction
Source authority
Federal
Publishing agency
Office of Inspector General, U.S. Department of Health and Human Services
Report ID
REPORT 167
Examines
Mississippi

Mississippi Did Not Report and Return All Medicaid Overpayments for the State’s Medicaid Fraud Control Unit Cases

The State agency did not report and return the Federal share of all MFCU-determined Medicaid overpayments identified for FYs 2021 through 2023. The audit identified underreporting across multiple categories, with 12 cases reported and returned (totaling $290,584) compared with…

Findings
5
Recommendations
5
Open evidence record
Source status
Original source
Published
Sep 2025
Scope
Single jurisdiction
Source authority
Federal
Publishing agency
Office of Inspector General, U.S. Department of Health and Human Services
Report ID
REPORT 166
Examines
New Jersey

New Jersey Did Not Ensure That Some Medicaid Personal Care Assistant Services Provided Under the Personal Preference Program Met Federal and State Requirements

New Jersey did not ensure that the State agency adequately monitored and ensured compliance by its MCOs and fiscal intermediary with Federal and State requirements for PPP PCA services; as a result, the program was vulnerable to misuse of Federal funds and the health and safet…

Findings
5
Recommendations
2
Open evidence record
Source status
Original source
Published
Aug 2025
Scope
Single jurisdiction
Source authority
Federal
Publishing agency
Centers for Medicare & Medicaid Services
Report ID
REPORT 121
Examines
Washington

Washington Medicaid Managed Care Medical Loss Ratio Audit

CMS identified eight findings requiring correction, but none resulted in an MLR recalculation below the 85% remittance threshold; the audit identified operational improvements and oversight enhancements to ensure compliance with federal MLR requirements.

Findings
8
Recommendations
6
Open evidence record
Source status
Original source
Published
Jul 2025
Scope
Single jurisdiction
Source authority
Federal
Publishing agency
U.S. Department of Health and Human Services, Office of Inspector General
Report ID
REPORT 46
Examines
Wisconsin

Wisconsin’s Fee-for-Service Medicaid Payments for Applied Behavior Analysis

The Wisconsin Department of Health Services’ ForwardHealth program did not provide adequate oversight of FFS Medicaid ABA payments, resulting in improper and potentially improper payments for autism-related ABA services. The program had not conducted a statewide postpayment re…

Findings
12
Recommendations
6
Open evidence record
Source status
Original source
Published
Jul 2025
Scope
National
Source authority
Federal
Publishing agency
U.S. Department of Health and Human Services, Office of Inspector General
Report ID
REPORT 45
Examines
National scope

Analysis of Selected Nursing Facilities’ Use of Medicaid Reimbursement for Direct Care Compensation

The data brief concludes that there is no clear, positive correlation between higher direct care compensation and higher nursing hours per resident day (HPRD). Increases in direct care compensation are largely attributed to higher labor costs from contracting for nursing staff…

Findings
9
Recommendations
0
Open evidence record
Source status
Original source
Published
Jul 2025
Scope
Single jurisdiction
Source authority
Federal
Publishing agency
U.S. Department of Health and Human Services, Office of Inspector General
Report ID
REPORT 50
Examines
Pennsylvania

Pennsylvania Capitation Payments for Enrollees With Multiple Medicaid Identification Numbers

The OIG concluded that Pennsylvania made unallowable capitation payments totaling at least $8,784,549 ($4,596,390 Federal share) for enrollees with multiple Medicaid ID numbers during the audit period (January 1, 2019 – December 31, 2022). The unallowable payments were caused…

Findings
3
Recommendations
5
Open evidence record
Source status
Original source
Published
Jul 25, 2025
Scope
Single jurisdiction
Source authority
Federal
Publishing agency
Centers for Medicare & Medicaid Services
Report ID
REPORT 11
Examines
Ohio

Ohio Medicaid Managed Care Medical Loss Ratio Audit

While no remittances were required based on the findings, the audit identified multiple areas for improvement in Ohio’s oversight and reporting processes to ensure compliance with federal requirements and enhance program integrity.

Findings
3
Recommendations
11
Open evidence record
Source status
Original source
Published
Jun 26, 2025
Scope
National
Source authority
Federal
Publishing agency
U.S. Government Accountability Office
Report ID
REPORT 12
Examines
National scope

Medicaid Managed Care Improper Payment Estimate

The GAO report highlights that while CMS's current improper payment estimates for Medicaid managed care are near zero, they do not capture all program integrity risks. CMS has taken steps to improve oversight through audits and reviews, but additional measures and data improve…

Findings
5
Recommendations
4
Open evidence record
Source status
Original source
Published
May 2025
Scope
Single jurisdiction
Source authority
Federal
Publishing agency
U.S. Department of Health and Human Services, Office of Inspector General
Report ID
REPORT 57
Examines
Maryland

Maryland Did Not Comply With Federal Waiver and State Requirements at 20 Adult Day Care Facilities Audited

The Maryland Department of Health did not fully comply with Federal waiver and State requirements in overseeing adult day care facilities; 253 noncompliance instances were identified across health and safety and administrative areas, with inspections insufficient to detect vio…

Findings
1
Recommendations
3
Open evidence record
Source status
Original source