Seoul Medical Group and Advanced Medical Management: The Auditor Became a Subsidiary

The Seoul Medical Group Medicare Advantage fraud settlement called for over $62M in payments to resolve allegations of spinal-diagnosis upcoding. Behind that headline was a whistleblower’s account of a management company that found overpayments, proposed withdrawing codes and then was bought by the business it audited. The alleged problem reached beyond the diagnoses to who could still challenge them.

The Department of Justice announced the settlement on March 26, 2025. California-based Seoul Medical Group and its subsidiary Advanced Medical Management agreed to pay $58,740,000, with separate payments of $1,760,000 from their former president and majority owner and $2,350,000 from Renaissance Imaging Medical Associates. The California radiology group allegedly helped support the disputed diagnoses.

Seoul Medical Group had expanded from Los Angeles into at least six states. The alleged payment scheme reached beyond the provider to the companies reviewing and supporting its codes.

A former vice president and chief financial officer of Advanced Medical Management brought the False Claims Act qui tam case. The whistleblower’s position matters: this Medicare Advantage fraud case came from inside the company reviewing the provider’s records.

How the Spinal Diagnoses Increased Payments

The government alleged that Seoul Medical Group and its former owner submitted spinal enthesopathy and sacroiliitis diagnoses for patients who had neither condition. The settlement addressed conduct from 2015 through 2021. According to the government, those diagnoses increased payments from Medicare to a health plan, which passed a portion of the increase to Seoul Medical Group. Taxpayers were allegedly paying for spinal conditions the patients did not have.

That is the diagnosis-to-payment connection in this case. Medicare Advantage plans receive a per-person payment to cover care and pay providers to deliver it. The Centers for Medicare and Medicaid Services adjusts the plan’s payment using information about each beneficiary, including diagnoses. Conditions expected to cost more to treat generally produce a higher risk score and a larger payment.

The provider can therefore have a financial stake in what the plan reports to Medicare. According to the government’s account, Seoul’s spinal codes increased both the plan’s payment and the portion reaching the medical group.

The Audit Found an Overpayment and Proposed a Withdrawal

According to the whistleblower’s complaint, Advanced Medical Management identified more than $6.7 million in overpayments associated with the period from 2015 to mid-2017 and proposed a timetable for withdrawing codes. The medical group refused.

Advanced Medical Management was the outside management company reviewing and auditing Seoul’s records. For the finance or coding employee who worked on the review, the withdrawal proposal connects the disputed diagnoses to the correction the business was asked to make.

Seoul Acquired the Company Reviewing Its Codes

The whistleblower alleged that Seoul Medical Group or its subsidiary purchased Advanced Medical Management on or about June 7, 2018, then removed personnel in an effort to prevent corrections to Seoul’s risk-adjustment coding. The acquisition put the company under review in control of the company doing the reviewing.

The complaint also alleged that, in December 2018, the compliance committee flagged the coding as fraud, waste and abuse, and Seoul refused to allow review and audit of medical charts prepared by its board members. The charts placed off-limits were the ones written by the board.

An audit can exist on paper while the people who know its findings lose the authority to act.

The wider industry has a financial reason to bring diagnosis recording under closer control. In its March 2026 Medicare Advantage report, the Medicare Payment Advisory Commission describes how payment policy can encourage insurer-provider integration by rewarding more thorough diagnosis recording, alongside efficient care and quality measures.

The 2015 working paper Upcoding or Selection? Evidence From Medicare on Squishy Risk Adjustment, hosted by Duke Economics, estimated that private Medicare enrollees generated diagnosis-based risk scores 6% to 16% higher than they would under fee-for-service Medicare. It also found that coding intensity increased with vertical integration. The paper describes how an insurer can bring its payment incentive into the exam room: by paying physicians for the diagnoses they code instead of for the visits and procedures they provide.

The paper’s finding explains why control over coding has commercial value. The alleged purpose of the management-company purchase was more pointed: stopping a correction that would reverse the benefit of the codes.

The Radiology Reports Followed the Plan’s Question

The government’s radiology allegation began with a health plan questioning Seoul’s use of spinal enthesopathy. According to DOJ’s account of the response, Seoul enlisted Renaissance Imaging Medical Associates to create radiology reports that appeared to support that diagnosis. Renaissance’s separate settlement concerned allegedly conspiring with Seoul over the false spinal diagnoses.

The order matters. A payer questioned the diagnosis, and the alleged response was to obtain reports that appeared to support it. An employee who saw the payer’s question, the request to the radiology group or the resulting report could know how that support came into the file.

A 2019 Health Management, Policy and Innovation study, Comparing Diagnostic Coding Intensity for Medicare Advantage and Fee for Service, compared payment-driving HCC risk scores with adjusted diagnostic group scores, a diagnosis-based measure that was not used for Medicare Advantage payment. The measures tracked similarly in fee-for-service Medicare. In Medicare Advantage, the payment measure showed substantially greater risk than the alternative measure. The study described its findings as consistent with selective upcoding.

For an insider, the useful connection is the question of how the payment incentive affected the documentation being produced.

What the Finance and Audit Records Can Show

The former Advanced Medical Management finance executive’s case shows the value of knowing what happened after a coding review. The audit finding, proposed withdrawal timetable, management response and later restrictions on reviewers can connect the diagnosis dispute to decisions inside the business. The radiology allegation adds another view: what happened after the payer asked for support.

A similar correction issue appeared at health care provider Sutter Health. In its 2021 settlement announcement, the government described allegations that Sutter failed to take sufficient action to identify and delete additional unsupported diagnoses after learning of the problem. Both cases put the response to known coding concerns at the center of the payment story. Seoul’s acquisition allegation gives that failure to act on an audit a particularly concrete form.

For someone inside a management company, the important knowledge may sit in finance, the review team or the decisions governing which charts can be examined. We work with that knowledge to connect the disputed codes, the money and the response to the findings.

A whistleblower case under the False Claims Act can pay 15% to 30% of what the government recovers.

When You Know Why the Correction Stopped

If you saw an audit identify unsupported diagnoses and watched the correction stall, speak to our whistleblower experts about what happened inside the business. We build the case with you around the findings, the payment trail and the people controlling the response, then bring in Medicare Advantage fraud whistleblower lawyers who understand provider and management-company cases. We stay beside you as your partners throughout the case.