Medicare Advantage Is Retreating From the DC Area for 2027. About 440,000 Enrollees Need to Read This Now.

What's Actually Happening to Medicare Advantage in the DC Metro Area Right Now?

Let's start with the uncomfortable geography lesson. The "Washington DC metro area" for Medicare purposes is not just the District itself — it's a patchwork of service areas that carriers can exit one county at a time without making a single press announcement. We're talking about DC proper (population roughly 702,000), Montgomery County MD (pop. ~1.06 million), Prince George's County MD (pop. ~967,000), Arlington County VA (pop. ~238,000), Fairfax County VA (pop. ~1.15 million), and a half-dozen surrounding jurisdictions. Each is its own Medicare service area. Carriers can stay in Fairfax and bail on Prince George's. They can shrink their network in DC while keeping their brochures glossy. (This is the part nobody tells you at the "free lunch" Medicare seminar.)

According to the CMS Medicare Enrollment Dashboard, the DC-MD-VA metro area had approximately 847,000 total Medicare beneficiaries as of 2025 enrollment data. With MA penetration at roughly 52% nationally — and higher in urban cores — conservatively 440,000 people in this region are in Medicare Advantage plans. Of those, a meaningful share are enrolled in plans from carriers that have been publicly flagging their mid-Atlantic footprint as "under review."

Here is the national context: Between 2024 and 2025, the number of Medicare Advantage plans available nationwide declined by approximately 300 plans — the first net reduction in over a decade — according to KFF's Medicare Advantage 2025 Enrollment Update. That's not a blip. That's a structural retreat driven by CMS reimbursement cuts, higher-than-projected medical costs (read: post-COVID utilization that never snapped back), and risk adjustment audits that have made urban, dense markets like DC less profitable for national carriers.

The DC metro is especially exposed because it is an expensive market: high hospital costs, a concentrated provider market (think MedStar Health dominating inpatient beds), and a beneficiary population that is older, sicker, and more urban than the rural counties where MA has always been less competitive. Translation: when carriers are looking for places to cut, the DC area is not as protected as it might seem from the outside.

Which Carriers Are Actually Pulling Back — and Which Plans Are at Risk?

I'm going to be specific here, because "some carriers may reduce availability" (I am physically uncomfortable even typing that sentence) helps exactly nobody.

Humana: The Most Significant Mid-Atlantic Retreat

Humana's October 2024 announcement that it would exit 13 states and 560,000+ enrollees for 2025 was the largest single-year MA contraction in modern memory, per Humana's own investor release. Humana's Maryland and Virginia footprint was already thin before that announcement. By 2026, Humana offers zero plans in DC proper. (Zero. As in: you cannot buy a Humana Medicare Advantage plan in Washington DC.) Maryland counties saw reductions. The trajectory for 2027 based on Humana's stated strategy of focusing on "core markets" does not favor mid-Atlantic expansion.

Aetna (CVS Health): Network Tightening Without a Full Exit

Aetna has not publicly announced a DC-area exit for 2027. However, per KFF's 2025 MA enrollment analysis, Aetna's national enrollment declined by approximately 1 million enrollees between 2024 and 2025 — a 15% drop — as the carrier repriced plans and tightened networks. In the DC area, Aetna's HMO plans (which require in-network care) are particularly vulnerable to the hospital network problem: MedStar Health, the dominant inpatient system in DC and Maryland, has been in contract renegotiations with multiple MA carriers. If MedStar exits an Aetna network, your in-network hospital options in DC could drop overnight without the plan technically "leaving."

UnitedHealthcare: The Biggest Player, Under Pressure

UnitedHealthcare remains the largest MA carrier in the DC metro area and nationally, with approximately 9.4 million MA enrollees as of 2025 per KFF data. United has not announced a DC-area exit. But: United reported $1.5 billion in MA losses in Q4 2024 per SEC filings, and its parent company UnitedHealth Group has been under CMS scrutiny for risk-score manipulation audits. United's 2026 plans in the DC area include HMO and PPO options across multiple counties — but plan IDs and premiums change annually. A plan you're in today under contract H5253 could be restructured, repriced, or consolidated by 2027 with a different contract ID entirely.

What Does the County-by-County Data Actually Show for DC Metro Medicare?

Here is the breakdown by jurisdiction, using CMS Medicare Plan Finder data and KFF state-level analysis. Note that exact plan counts for 2027 will not be published until October 1, 2026 — any carrier claiming to tell you your 2027 options today is guessing or selling.

Sources: CMS Medicare Enrollment by State/County (cms.gov/data-research), KFF Medicare Advantage 2025 State/County data (kff.org), CMS Medicare Plan Finder (medicare.gov/plan-compare). Estimates based on publicly available 2025 data; 2027 plan counts will be published October 1, 2026.

Prince George's County deserves a special paragraph. It has the highest MA penetration in the DC metro area — estimated at 55% — meaning more than half of all Medicare beneficiaries there are in an MA plan. Prince George's also has a large Black senior population, a demographic that has historically been targeted aggressively by MA marketing and also bears the highest burden when plans exit. Per KFF's Medicare Advantage and Equity analysis, Black beneficiaries enroll in MA at higher rates than white beneficiaries in most metro areas. When carriers exit, they exit the same counties where those enrollees are concentrated. That is not a coincidence. That is math.

What Does "Going Back to Original Medicare" Actually Cost You — in Real Dollars?

This is the question nobody asks until January 1, when the panic hits. Let me walk through the actual financial exposure for a DC-area senior whose MA plan exits.

First: you are automatically returned to Original Medicare (Parts A and B) if your plan exits your service area. Your Part B premium — $185.00/month in 2026, per CMS Medicare.gov — continues. What you lose is the zero-dollar (or low-dollar) premium of your MA plan AND the bundled coverage. Here's what that looks like in dollars:

Sources: CMS 2026 Medicare Cost Figures (cms.gov/Medicare/Medicare-Fee-for-Service-Payment), Medicare.gov benefits overview. MA plan specifics vary by contract; verify at medicare.gov/plan-compare.

That "unlimited" in the out-of-pocket maximum row is doing a lot of work. Original Medicare has no annual cap on what you can owe. A 10-day hospital stay for, say, a hip replacement or a cardiac event can cost a beneficiary tens of thousands of dollars without a Medigap supplement. The MA plan's MOOP (Maximum Out-of-Pocket) — capped by CMS at $9,350 in-network for 2026 — exists specifically to protect against this. When your plan exits and you don't replace it, that protection disappears.

What Are the 5 Specific Steps DC-Area Seniors Should Take Right Now — Before October?

I'm going to be uncharacteristically direct here (the data has made me emotional, which is a first):

Step 1: Find Your Plan's Contract ID Today

Every Medicare Advantage plan has a CMS Contract ID (format: H####-###) and a Plan ID. This is on your insurance card and in your Evidence of Coverage document. Write it down. When 2027 plan data goes live October 1 at medicare.gov/plan-compare, search that specific contract ID first to see if it still exists in your county.

Step 2: Verify MedStar and Inova Are Still In-Network

For DC and Maryland: confirm MedStar Health hospitals are in your plan's network right now, not just when you enrolled. MedStar Washington Hospital Center (110 Irving Street NW) and MedStar Georgetown University Hospital are the two Level I trauma centers in DC. For Northern Virginia: confirm Inova Health System hospitals are in your network. These are the systems you'd be rushed to in an emergency. Check your insurer's online provider directory — not the paper one, the live online one.

Step 3: Request a 2026 Evidence of Coverage

Your carrier was required to send you the 2026 EOC by October 15, 2025. If you threw it away (no judgment — it's 200 pages), call your carrier's member services line and ask for a replacement. Compare it to your 2025 EOC. Any benefit that got worse — copay increases, prior authorization added, drug removed from formulary — is a signal about trajectory.

Step 4: Check Your State's Medigap Protections NOW

Maryland has guaranteed-issue Medigap rights year-round, per the Maryland Insurance Administration — meaning if your plan exits, you can get a Medigap supplement without medical underwriting. DC has similar protections. Virginia's protections are more limited. Knowing this in April matters because if you need to enroll in a Medigap plan after a December plan-exit notice, you'll have weeks — not months — to act.

Step 5: Call SHIP — It's Free and It's There for This Exact Situation

State Health Insurance Assistance Programs (SHIPs) are federally funded, free counseling services with zero financial incentive to sell you anything. In DC: DC SHIP at 202-727-8370. In Maryland: Maryland SHIP at 410-767-1100. In Virginia: VICAP at 804-662-9333. These counselors can pull up your exact plan on their screens and walk you through every option. Use them.

Why Is This Happening Now? The National Policy Driver Behind Local Plan Exits

Follow the money