What is a ghost network on an ACA Marketplace plan?

A ghost network is a plan's published provider directory that contains large numbers of entries for doctors who cannot actually be seen under that plan. The entry exists, the name and address look valid, and the search tool shows the provider as in-network, but one or more of these is wrong: the provider is not contracted with the plan for 2027, is not accepting new patients, has moved or retired, is deceased, or practices at a location the plan does not cover. The result is that enrollees who pick a plan because 'my doctor is listed' discover after January 1 that they have to pay out-of-network rates or find a new provider. Independent 2024 to 2026 audits of Marketplace, Medicare Advantage, and Medicaid directories have found error rates between 20 and 50 percent, with mental health providers consistently the worst category. The problem is specifically acute for behavioral health: a 2024 ProPublica investigation and a May 2026 Boston Globe analysis both found that fewer than one in five directory-listed psychiatrists accepted the plan and were accepting new patients within a 30-day window.

Why do ghost networks keep happening if there are rules against them?

Three overlapping reasons. First, directories are self-reported by carriers, and the federal network adequacy standard that applies to Marketplace plans has historically been under-enforced. The No Surprises Act requires carriers to update directories every 90 days, but the penalty structure is thin and most states do not conduct secret-shopper audits. Second, carriers have a financial incentive to overstate network breadth: a plan with more listed providers looks more attractive, satisfies the network adequacy metric on paper, and clears the federal certification process without extra scrutiny. Third, providers themselves rarely proactively tell carriers to delist them when they stop accepting a plan, retire, or close a practice, so stale entries accumulate. For 2027, CMS has proposed stricter directory accuracy rules for Medicare Advantage with secret shopper audits and public reporting of error rates, but those rules do not yet extend to Marketplace plans and are not final.

How do I verify a doctor is actually in-network before I enroll in a 2027 ACA plan?

The ten-minute protocol: write down the exact 2027 plan name and HIOS plan ID from the HealthCare.gov Window Shopping or application page. Open the plan's provider directory from the plan details page (not a Google search). Look up each doctor by name and NPI number. Call the doctor's billing office directly and ask three questions: 'Are you contracted with [exact plan name and HIOS ID] for the 2027 plan year?' 'Are you accepting new patients under that plan as of January 1, 2027?' 'Does the provider I would see practice at the [address] listed in the directory?' Record the name of the person who answered, the date, and the time of your call. If the three answers are not an unambiguous yes, treat the directory entry as unreliable. Repeat for each doctor you expect to see at least once in 2027, and for the hospital where your primary care doctor admits patients. A ten-minute call before November 1 is worth hours of appeal paperwork in February.

What are the clearest red flags that a plan has a ghost network problem?

Five flags, in order of severity. One, the directory lists the same phone number for dozens of providers at the same address (a sign of a billing aggregator rather than real practices). Two, specialists in a narrow field (psychiatrists, endocrinologists, pediatric subspecialists) appear in overwhelming numbers in a rural area where the actual supply is known to be limited. Three, carrier search returns dozens of 'accepting new patients' providers but a direct call to the three nearest offices finds none actually accepting the plan. Four, the directory last-updated date is more than 90 days old or missing. Five, the plan is priced noticeably below similarly rated competitors in the same metal tier and county; a steep price gap often reflects a thin or stale network rather than genuine efficiency. If a plan hits two or more of these flags, run the verification protocol on five providers before committing.

What should I do if I discover after January 1 that my plan has a ghost network?

You have three immediate protections. The No Surprises Act requires that if you relied in good faith on an inaccurate directory listing to pick a plan, the carrier must process that provider's claims at the in-network cost-sharing level for a transitional period, typically 90 days, while you find a replacement. Request this in writing from the carrier and attach the directory screenshot showing the provider as in-network. ACA continuity-of-care rules require the carrier to maintain in-network coverage for an active course of treatment, pregnancy care, or a terminal illness for up to 90 days (longer in some states) when the provider leaves the network or was never actually in it. File a complaint with your state Department of Insurance, which is the enforcement mechanism that most consistently produces a carrier response; include dates, directory screenshots, and the names of billing staff who confirmed the provider was not in-network. If you are within the Open Enrollment window (through January 15, 2027) or within 60 days of a qualifying life event, consider switching plans; the loss-of-access situation often itself qualifies as a Special Enrollment Period in states that have adopted the inaccurate-directory SEP.

Are ghost networks worse for mental health care than for other specialties?

Yes, consistently. Three major 2024 to 2026 investigations by ProPublica, the Boston Globe, and KFF Health News have placed mental health provider directory error rates between 60 and 80 percent, versus 20 to 40 percent for primary care and most specialties. Reasons: psychiatrist supply is already short of demand, many psychiatrists have moved to cash-only private practice but remain listed, in-network reimbursement rates are lower than for medical specialties so active-but-full practices do not update their status, and the Mental Health Parity and Addiction Equity Act is unevenly enforced on network adequacy. If mental health access is a priority for your 2027 plan, verify twice as aggressively: do not pick a plan based only on 'has a lot of psychiatrists listed.' Call four or five of the listed providers and ask whether they are accepting new patients under the exact plan name for January 1, 2027. If none are, treat the plan as if there is no mental health network and factor that into whether another plan with worse premiums but confirmed mental health access is the better choice.

How to Spot a Ghost Network in a 2027 ACA Marketplace Plan Before You Enroll on November 1

By HealthCalc Team

Published October 30, 2026

11 min read

Open Enrollment for 2027 ACA Marketplace plans opens Sunday, November 1, 2026 — two days from today. The single most common reason households pick the wrong plan is not price, benefits, or deductible. It is a provider directory that said "yes, your doctor is in-network" and turned out to be wrong.

Ghost networks — plan directories padded with doctors who are not actually accepting the plan, not accepting new patients, retired, deceased, or practicing somewhere else — are the structural problem that connects three otherwise separate 2026 stories: the wave of ghost network lawsuits against Blue Shield of California, Anthem, and Elevance; the CMS proposal to require secret-shopper audits on Medicare Advantage directories for 2027; and the mounting state-level enforcement actions in California, New York, and Massachusetts. The problem is not new, and it is not getting better on its own. Independent audits consistently place directory error rates between 20 and 50 percent for Marketplace plans, with mental health providers hit worst at 60 to 80 percent.

This guide covers what a ghost network is, why they persist despite the rules against them, the five red flags that signal a plan has a thin or stale network, the ten-minute verification protocol to run before you enroll, and the No Surprises Act and ACA continuity-of-care protections if you discover a ghost network after January 1. If you do nothing else between today and November 1, do the ten-minute check on the plan you are leaning toward.

What a Ghost Network Actually Is

A ghost network is a plan's published provider directory that contains large numbers of entries for providers who cannot actually be seen under that plan. The entry exists, the name and address and phone number look valid, and the plan's online search tool shows the provider as in-network. One or more of the following is true anyway.

The provider is not contracted with the plan for the 2027 plan year, even if they were in 2026.
The provider is contracted but is not accepting new patients, and the directory does not say so.
The provider has retired, moved out of state, or died, and the carrier has not removed the entry.
The provider is listed at a location where they no longer practice (and may never have practiced).
The listed phone number goes to a billing aggregator or a disconnected line, not the practice.

The pattern that distinguishes a ghost network from an ordinary stale entry is scale. One or two errors in a directory of 10,000 providers is maintenance friction. When 20 to 50 percent of entries are wrong — which is what independent audits have consistently found — the directory as a product is unreliable, and consumers who use it to pick plans are being materially misled. The 2024 ProPublica investigation of mental health networks, the 2024-2026 series of class action lawsuits against Blue Shield of California, Anthem, and Elevance, and the May 2026 Boston Globe analysis of psychiatrist directories all describe the same pattern: directories built for marketing optics rather than real access.

Why Ghost Networks Persist

Three overlapping reasons.

Directories are self-reported by carriers, and enforcement is uneven. The No Surprises Act requires carriers to update directories every 90 days and to make affordable fixes when a consumer relies on bad information, but the penalty structure is thin and most states do not conduct secret-shopper audits. The 2024 Senate Finance Committee hearing on ghost networks surfaced that the federal government had collected no fines under the directory accuracy provisions in the first two years of the law.

Carriers have a financial incentive to overstate network breadth. A plan with more listed providers looks more attractive to consumers, more compliant to regulators, and more marketable to brokers. The federal network adequacy standard is based on counts of listed providers within time and distance limits of enrollee ZIPs. A thin network padded with stale entries can pass that test on paper, even when the actual appointment-availability math fails badly. There is no counterbalancing incentive to trim listings aggressively.

Providers rarely proactively ask carriers to delist them. When a doctor stops taking a plan, moves, retires, or closes, the burden of updating the carrier's directory often falls on the provider's office — and office staff have little reason to spend an afternoon on paperwork for a plan they no longer want anything to do with. Stale entries therefore accumulate rather than disappear. The problem compounds every year carriers do not do their own secret-shopper audits.

For 2027, CMS has proposed stricter directory rules for Medicare Advantage, including mandated secret shopper audits and public reporting of error rates by plan. Those rules do not yet apply to Marketplace plans and have not been finalized. The practical reality on the day of OEP 2027: the directory is your starting point, not your source of truth.

Five Red Flags That Signal a Ghost Network

If you see two or more of these in a plan's directory, treat that plan as likely to have ghost network problems and verify at least five providers by phone before enrolling.

Red Flag 1: Dozens of providers at one address and phone number

Open the directory and search by specialty. If the result list shows the same street address or the same phone number repeated across many providers, that typically indicates a billing aggregator, a telehealth hub, or a shell listing — not independent practices. The individual providers may be real, but the probability that any of them is actually accepting the plan at that location is low. One honest aggregator in a directory is normal; dozens of entries sharing a single phone number is the clearest machine-detectable signal of a padded directory.

Red Flag 2: Specialists in oversupply in rural counties

If you live in a rural county and a plan's directory shows dozens of psychiatrists, pediatric subspecialists, or endocrinologists in your area, cross-check against publicly available HRSA designations of Health Professional Shortage Areas. A county designated as a shortage area for a specialty should not have 40 listed specialists accepting ACA Marketplace plans. The directory count is the padded number; HRSA is the actual supply number.

Red Flag 3: "Last updated" is missing or older than 90 days

The No Surprises Act requires carriers to update directories at least every 90 days. Open the plan's directory and look for a last-updated or last-verified date. If it is older than 90 days or missing entirely, the plan is already in violation of the rule and the data in front of you is stale by definition. Report the violation to your state Department of Insurance regardless of whether you enroll.

Red Flag 4: The three nearest offices do not actually accept the plan

Pick three in-network providers nearest your home from the directory. Call each office and ask whether they are contracted with the specific plan for 2027. If zero of three answer yes, the directory for your immediate area is unreliable and the plan is a poor fit regardless of its sticker price. If one of three answers yes, verify the remaining providers you need to see before enrolling.

Red Flag 5: The plan is priced noticeably below similarly rated competitors

Thin networks produce cheaper premiums because the carrier has negotiated with fewer providers (or has paper agreements with providers who do not actually take the plan). If a Silver plan in your county is priced 15 percent or more below the next cheapest Silver plan from a comparable carrier, confirm whether that is driven by actual network efficiency or by a thinner, staler network. Price alone is not disqualifying; price plus any of the first four flags is.

The Ten-Minute Verification Protocol

Run this on your top-choice 2027 plan before November 1. It is the single highest-ROI thing you can do with ten minutes of your OEP preparation.

1Capture the exact plan name and HIOS ID

From the HealthCare.gov Window Shopping or application page, copy the full plan name and the 14-character HIOS plan ID. Billing staff can confirm or deny network status instantly if you give them the HIOS ID; a vague "the Blue PPO 2027" will produce a vague answer.

Window Shopping walkthrough: how to find the HIOS ID →

2Look up each provider in the plan's directory, not Google

Only the plan's own 2027 directory is authoritative. A doctor's own website, Zocdoc, or a Google search can show in-network status for a different plan year, a different plan from the same carrier, or no plan at all. Use the plan's directory link from the Window Shopping plan details page.

3Call each provider's billing office and ask three questions

Not the front desk, not the appointment line — the billing office. They are the only people who know contract status for the next plan year. Ask: (a) Are you contracted with [exact plan name and HIOS ID] for the 2027 plan year? (b) Are you accepting new patients under that plan starting January 1, 2027? (c) Will the provider I would see be practicing at the address and location listed in the directory? Record the name of the person who answered, the date, and the time.

4Verify at least one in-network hospital

Even if your primary care is confirmed, an out-of-network hospital can trigger a catastrophic bill. Call the admissions office of the hospital your primary care doctor admits to and confirm the plan's 2027 contract status. If the primary care doctor is in-network but the hospital is out, you have a continuity-of-care problem waiting to happen.

5Save the evidence

Take screenshots of the directory entries showing each provider as in-network for the plan, dated for your records. Note the directory's last-updated date. If you later discover the entries were wrong, these screenshots are the single most valuable piece of evidence in a No Surprises Act good-faith-reliance claim or a state insurance complaint.

Total time for a household with two or three regular providers and one hospital: eight to twelve minutes. If any of the five steps surfaces a discrepancy, run the protocol on your second-choice plan before you commit.

If You Discover a Ghost Network After You Enroll

You have three overlapping protections. Use all three.

No Surprises Act good-faith reliance

Under the federal No Surprises Act, if you relied in good faith on an inaccurate directory listing to pick a plan and subsequently see that provider believing them to be in-network, the carrier must process the claim at in-network cost-sharing. Request this in writing within 30 days of receiving the first out-of-network claim. Attach the directory screenshot and the dated note from your original verification call. The carrier is required to respond within 30 days.

ACA continuity-of-care

If you were in an active course of treatment with the provider when you enrolled — chemotherapy, pregnancy care, a scheduled surgery, an ongoing therapy course, treatment for a chronic condition — ACA continuity-of-care rules require the carrier to maintain in-network coverage for a transitional period, typically 90 days, with longer protections in some states. The request has to be made promptly, usually within 30 days of enrollment or 30 days of learning the provider is out-of-network.

State Department of Insurance complaint

The state DOI is the single most reliable escalation path. Carriers respond to DOI complaints within 30 to 60 days and almost always resolve network accuracy complaints in the consumer's favor when the evidence is clean. File online with your state DOI, include the dated directory screenshots, the billing office call notes, and the carrier's response. California, New York, and Massachusetts have the most active enforcement programs; most other states will still process the complaint and apply pressure.

Note on Special Enrollment: A handful of states, including California, treat discovery of a materially inaccurate directory as a qualifying event for a Special Enrollment Period, meaning you can switch plans mid-year. Federal rules do not yet include this nationally. If you are within the Open Enrollment window (November 1, 2026 through January 15, 2027), you can switch regardless of the reason.

Ghost Networks and Mental Health: A Special Case

If mental health access is a priority for your 2027 plan, double every verification. Three major 2024 to 2026 investigations have placed mental health provider directory error rates between 60 and 80 percent, versus 20 to 40 percent for medical specialties. The gap is driven by shorter supply, lower in-network reimbursement rates for behavioral health, and uneven enforcement of the Mental Health Parity and Addiction Equity Act's network adequacy requirements.

Practical adjustments. Call four or five directory-listed psychiatrists or therapists rather than two. Ask specifically whether they are accepting new patients for January 1, 2027. If zero of five are, treat the plan as if there is no mental health network available to you, and compare against a plan with worse premiums but confirmed access. If your current provider is a psychiatrist or therapist you want to keep, confirm their 2027 status by phone before you select a plan on November 1; a 2026 in-network status does not carry over automatically, and the directory may still show them even if they have dropped the plan.

Running the Numbers With Confirmed Networks

Once you have run the ten-minute verification and know which 2027 plans actually have the providers you need, the cost comparison is finally meaningful. A plan with a $380 monthly net premium and a confirmed in-network primary care doctor is cheaper than a $320 plan whose directory evaporates in February. Use the ACA Subsidy Calculator to confirm the net premium on your short list, and the Plan Cost Calculator to estimate full-year out-of-pocket exposure including deductible, coinsurance, and OOP maximum.

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Two-Day Checklist Before Open Enrollment Opens

The compressed schedule from today, October 30, 2026, through November 1.

Friday, October 30 (today): Twenty minutes in Window Shopping to pull your top two or three 2027 plan candidates. Capture each plan's name and HIOS ID.
Saturday, October 31: Run the ten-minute verification protocol on your top-choice plan. If a flag appears, run it on the second-choice plan too. Save screenshots and call notes.
Sunday, November 1: OEP opens at 12:01 AM ET. Log in, confirm the application income, run the formal subsidy, and select the plan whose network you have verified. For a January 1 effective date, the hard deadline is December 15; after that you default to a February 1 start if you select by January 15.

Related Guides on This Site

Bottom line: Independent audits of ACA Marketplace provider directories find 20 to 50 percent error rates, and the number is 60 to 80 percent for mental health. The ten-minute verification protocol — capture the plan name and HIOS ID, look up each provider in the plan's directory, call the billing office with three specific questions, verify a hospital, and save the evidence — is the single highest-ROI thing you can do between today and November 1. If you discover a ghost network after enrollment, the No Surprises Act good-faith reliance protection, ACA continuity-of-care, and a state DOI complaint are the three overlapping tools to fix it.