On the Margins — 2026-03-16
On the Margins
Your daily health economics & actuarial brief
Monday, March 16, 2026
What's happening today
| ■ | MedPAC estimates Medicare Advantage overpayments at $76B annually, intensifying scrutiny of risk adjustment and plan payments. |
| ■ | BCBS Association says AI-enabled hospital coding may drive $2.3B in excess spending, pointing to upcoding and documentation inflation. |
| ■ | FDA will consolidate adverse-event surveillance into a single AEMS dashboard to streamline monitoring across drugs, devices, and biologics. |
| ■ | AMA survey finds 81% of physicians use AI at work, with adoption roughly doubling since 2023. |
Key Stories
MedPAC pegs Medicare Advantage overpayments at $76B, turning up heat
MedPAC estimates the federal government will overpay Medicare Advantage plans by $76B this year, according to Fierce Healthcare. In the same recommendations, MedPAC urged Congress to blunt an upcoming clinician pay cut and keep annual hospital payment updates. Separately, KFF said 98.9% of 2.6M beneficiaries in MA plans terminating at the end of 2025 have at least one MA-PD option in 2026. For MA P&L owners, the $76B headline is the risk--it invites payment tightening even if member disruption stays manageable.
BCBS pegs AI-enabled hospital coding at $2.3B in excess spend
On March 5, 2026, BCBSA and Blue Health Intelligence released research linking AI-enabled hospital billing to higher costs, estimating $2.3B excess spending. Across tens of thousands of maternity admissions through March 2025, anemia coding rose from about 4% in mid-2022 to 12%+ by early 2025. BCBSA tied the pattern to missing expected interventions, and estimated $663M inpatient and $1.67B+ outpatient exposure, including $22M added in one year. One BCBS plan saw 9% cost growth in 2023-2024, 20% tied to intensity, as billing-automation predictive AI rose 36% to 61% among AI users.
FDA moves to consolidate adverse-event surveillance into one AEMS dashboard
FDA said it will unify its "fragmented" product safety surveillance by combining disparate adverse-event databases into a single Adverse Event Monitoring System (AEMS) dashboard. The agency said the consolidated tool will cover drugs, vaccines, and other FDA-regulated products. FDA expects the change to improve the utility of safety signals while cutting costs. A tighter signal-to-action cycle can accelerate label changes and coverage or UM pivots, forcing faster assumption updates across utilization and risk.
AMA survey: 81% of physicians now use AI at work
The AMA reported that physicians' professional use of AI doubled from 2023 to 2026, based on a survey fielded earlier this year. The survey found 81% of doctors use AI at work, averaging 2.3 use cases per physician. Respondents were largely bullish on AI improving clinical care and work efficiency, but cited concerns about data privacy and skill loss. For payers and providers, the ROI story now competes with governance spend, think privacy controls, training, and model risk oversight.
Significant Digit
When ~1 in 10 scripts drives basically all the money, Part D trend becomes a concentration-risk problem, not a utilization problem.
MedPAC reports that in 2024, single-source drugs were about 10% of Part D prescriptions but accounted for over 83% of gross Part D spending. That is a brutal reminder that the bid is increasingly priced off a small set of high-cost brands and biologics, not the generic-heavy script count. If you are modeling Part D margin, the tail is now the dog, and the dog is expensive.
Other Relevant Headlines
Policy & Regulation
| UHS to buy Talkspace for $835M, pushing hybrid behavioral health scale | uhs.com |
| Genetic tests come under scrutiny in the Trump administration's fraud crackdown | Healthcare Dive |
| Minnesota lawmakers seek access to Optum's unredacted Medicaid report | Becker's Payer |
| Safety-net providers tackle AI adoption as Medicaid cuts loom | Healthcare Dive |
| In switching to Original Medicare, beware of Medigap plan refusals | KFF Health News |
Payer Operations
| Centene's stock falls as CEO Sarah London outlines ongoing ACA headwinds | Fierce Healthcare |
| Is it worth your time and money to set up an HSA? | KFF Health News |
Digital Health & AI
| Amazon launches health AI assistant on its website, expands free virtual care to 200M Prime members | Fierce Healthcare |
| Microsoft unveils Copilot Health as an AI health companion for consumers | Fierce Healthcare |
| 6 things to know about Stryker's cyberattack | MedCity News |
Pharmacy & Drug Pricing
| Public views on prescription drug costs: regulation, affordability and TrumpRx | KFF |
| 5 key facts about Medicaid prescription drugs | KFF |
ICYMI (Recent Key Stories)
- Montana sets July 1 Medicaid work requirements as 2027 mandate nears -- Montana scheduled Medicaid work requirements to begin July 1 ahead of a broader 2027 mandate. (2026-03-13)
- Walz floats Minnesota Medicaid ASO plan to phase out eight MCOs -- Minnesota Gov. Walz proposed shifting Medicaid to an ASO model to replace eight managed care organizations. (2026-03-12)
- Idaho H 850 targets 2028 Medicaid expansion repeal, enrollment near 80,000 -- Idaho's H 850 would set up a 2028 repeal of Medicaid expansion as enrollment approaches 80,000. (2026-03-11)
- CMS launches BALANCE: voluntary GLP-1 price talks for Part D and Medicaid -- CMS introduced BALANCE, a voluntary program to negotiate GLP-1 drug prices for Part D and Medicaid. (2026-03-10)
- Florida pushes Medicaid work requirements despite not expanding Medicaid -- Florida advanced efforts to add Medicaid work requirements even though the state has not adopted expansion. (2026-03-09)