The Thread · A Historical Pattern
Open and Past Fraud Allegations
Upcoding is making patients look sicker on paper than they are, to pull higher payments from Medicare. The allegations against UnitedHealth aren't a moment — they're a documented pattern stretching back nearly a decade, and they are still open.
The Timeline · 2017 → 2026
2017 · DOJ / False Claims
DOJ accuses UHG of knowingly defrauding Medicare
Failing to remove invalid diagnoses after becoming aware of them, and mining old records for additional illnesses — alleged to violate the False Claims Act. (Conduct dating to ~2011.)
2017 · CMS
CMS claws back ~$800K in overpayments
From a Medicare Advantage Risk Adjustment Data Validation audit of 2007 payments.
2022 · DOJ / HHS / OIG
Federal agencies accuse UHG of upcoding and fraud
Submitting claims for more serious procedures than were performed or necessary.
2022 · CMS
Repeated overpayments across 90+ audits (2011–2023)
CMS audits found UnitedHealthcare extracted overpayments multiple times.
2024 · WSJ
A year-long investigation: billions in MA overpayments
Home-visit diagnoses with no follow-up treatment, and checklists of diagnoses with bonuses for completing them.
2024 · Whistleblower
Optum Tri-State whistleblower alleges overdiagnosis
Executives allegedly counseled nurses to add billing codes from existing charts to make patients look sicker.
2024 · Watchdog · $3.7B
$3.7B from Medicare for in-home visits with no follow-up
More than twice any other Medicare Advantage insurer, per a federal watchdog.
2025 · DOJ + Grassley
DOJ opens a civil fraud investigation; Grassley demands answers
Focused on questionable diagnoses that trigger extra federal payments.
2025 · CalPERS
CalPERS amends its suit: execs "lied" about the upcoding scheme
Alleging UHG "fraudulently obtained billions of dollars" and inflated its stock price.
2025 · DOJ Criminal
DOJ reportedly opens a criminal Medicare-fraud investigation
Likely focused on Medicare Advantage business practices.
2025 · Optum Settlement
Optum settles a "dummy codes" class action
Agreeing to pay to resolve allegations it hid administrative costs in patients' medical bills.
2026 · Grassley Report
Grassley report: UHG captured more diagnoses than any peer
Strategized to capture a higher number of diagnosis codes than any other MA insurer — the latest entry in the pattern.