Federal prosecutors charge ten individuals in California healthcare fraud schemes totaling $297 million
Federal authorities arrested and charged ten individuals across Southern California on Tuesday in connection with healthcare fraud operations that allegedly defrauded government programs of nearly $297 million. The charges include schemes targeting both Medi-Cal and Medicare, with one case alone involving fraudulent claims approaching $270 million. Five suspects were taken into custody in the Los Angeles metropolitan area, while additional defendants face charges in the San Fernando Valley and surrounding communities.
The prosecutions form part of a nationwide initiative dubbed the “2026 National Health Care Fraud Takedown,” which resulted in criminal charges against 455 defendants across the United States. The coordinated effort exposed alleged fraudulent schemes totaling more than $6.5 billion, marking what Acting Attorney General Todd Blanche characterized as the largest combined federal and state operation against healthcare fraud in American history. Blanche emphasized during a press conference that the administration would pursue fraudsters aggressively, seizing assets and prosecuting offenders to the maximum extent permitted by law.
Major Medi-Cal prescription fraud operation uncovered
Christina Mareik, a 61-year-old resident of Whittier also known as Christina Marie Sanchez Hernandez, stands accused of orchestrating a sophisticated prescription fraud scheme that generated nearly $270 million in false claims submitted to California’s Medi-Cal program. Federal prosecutors allege that Mareik facilitated fraudulent prescriptions that ultimately resulted in payments exceeding $178 million from the state healthcare program. The operation allegedly involved expensive medications containing low-cost generic ingredients that were either medically unnecessary or never actually provided to the purported recipients.
According to the U.S. Attorney’s Office for the Central District of California, Mareik transmitted thousands of fraudulent prescriptions to co-conspirators and caused the submission of false prescriptions under her own identity. Authorities arrested her on June 17 and formally charged her with healthcare fraud. The scheme represents one of the largest individual cases of Medi-Cal fraud prosecuted in recent years, highlighting vulnerabilities in prescription drug reimbursement systems.
Hospice care companies accused of Medicare billing fraud
Federal prosecutors brought separate charges against three defendants allegedly involved in operating fraudulent hospice care companies that billed Medicare approximately $27 million for services. The 16-count indictment targets Oren David Shachar, 59, of Van Nuys; Abraham Shin, 66, of Corona; and Jeannie Choi, 57, of Torrance. The charges include conspiracy to commit healthcare fraud, multiple counts of healthcare fraud, aggravated identity theft, and violations of the Anti-Kickback Statute.
The indictment also charges the defendants with conducting monetary transactions involving criminally derived property exceeding $10,000. Prosecutors allege the trio conspired to defraud Medicare through their hospice operations in the San Fernando Valley. The case underscores ongoing concerns about fraudulent billing practices in the hospice care industry, where providers receive per-diem payments for patients who qualify for end-of-life services.
Illegal prescription of controlled substances targeted
Beyond the large-scale financial fraud schemes, federal authorities charged additional defendants with abusing their positions as medical professionals to illegally prescribe controlled substances. The U.S. Attorney’s Office emphasized that the charges reflect a dual approach to healthcare fraud prosecution, addressing both financial crimes against government programs and the illegal distribution of prescription medications that fuel the opioid crisis and other substance abuse problems.
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The controlled substance cases involve healthcare providers who allegedly violated their professional responsibilities by writing prescriptions outside legitimate medical practice. These prosecutions aim to combat the diversion of prescription drugs into illegal markets and prevent abuse of medications intended for patients with genuine medical needs.
Nationwide crackdown yields massive results
The California charges represent a fraction of the broader national enforcement initiative that swept across multiple states simultaneously. The 455 defendants charged nationwide face allegations involving schemes that allegedly defrauded Medicare, Medicaid, and other federal healthcare programs of more than $6.5 billion. The coordinated takedown involved cooperation among federal prosecutors, the Federal Bureau of Investigation, the Department of Health and Human Services Office of Inspector General, and state authorities.
Acting Attorney General Blanche declared that fraudsters could no longer exploit American taxpayers with impunity. The announcement signals the administration’s commitment to aggressive prosecution of healthcare fraud, which costs taxpayers billions of dollars annually and undermines the integrity of government healthcare programs. The FBI added two fugitives to its “Most Wanted Fraudsters” list in conjunction with the announcement, expanding efforts to locate and apprehend individuals who evade prosecution.
Financial impact and legal consequences
The charges carry severe potential penalties, including lengthy prison sentences and substantial financial restitution. Healthcare fraud convictions can result in decades of imprisonment, particularly when cases involve aggravated identity theft or violations of the Anti-Kickback Statute. The Anti-Kickback Statute prohibits offering, paying, soliciting, or receiving remuneration to induce referrals of patients or services covered by federal healthcare programs.
Defendants convicted of monetary transactions involving criminally derived property face additional charges related to money laundering. Federal authorities typically pursue asset forfeiture in healthcare fraud cases, seeking to recover proceeds obtained through fraudulent billing and to impose financial consequences beyond criminal penalties. The government’s ability to seize assets provides a powerful deterrent and helps compensate defrauded programs.
The prosecutions underscore vulnerabilities in government healthcare programs that sophisticated fraud operations exploit. Medi-Cal and Medicare rely on providers to submit accurate claims for legitimate services, creating opportunities for fraudulent billing when oversight mechanisms fail to detect suspicious patterns. Federal authorities continue to enhance data analytics and investigation techniques to identify fraudulent activity more rapidly and prevent losses before they accumulate to massive amounts.
