If you run a medical practice, you know the feeling. You submit a claim. You wait. Then you get a denial.
But not all insurance companies are created equal. Some deny claims at dramatically higher rates than others.
Knowing which insurance denies the most claims can help you:
- Set patient expectations
- Allocate denial management resources
- Decide which contracts to negotiate or drop
Let me share the latest data on payer denial rates.
The Simple Answer: Medicare Advantage Leads the Pack
According to recent government reports and industry studies, Medicare Advantage (MA) plans have the highest claim denial rates among all payer types.
| Payer Type | Average Denial Rate | Ranking |
|---|---|---|
| Medicare Advantage (MA) | 12-18% | Highest |
| Medicaid (Managed Care) | 10-15% | Second Highest |
| Commercial (e.g., BCBS, Cigna, Aetna) | 7-12% | Middle |
| Traditional Medicare (Part A/B) | 5-8% | Lower |
| Worker’s Compensation | 8-15% | Varies by state |
Within Medicare Advantage, some plans are worse than others.
Top 5 Highest-Denial Insurance Companies (by Denial Rate)
Based on 2024-2026 data from ACA required reporting and independent analyses:
| Rank | Insurance Company | Plan Type | Estimated Denial Rate |
|---|---|---|---|
| 1 | UnitedHealthcare (Medicare Advantage) | Medicare Advantage | ~18-22% |
| 2 | Humana (Medicare Advantage) | Medicare Advantage | ~16-20% |
| 3 | Cigna (Commercial + MA) | Mixed | ~12-15% |
| 4 | Aetna (now CVS Health) | Commercial + MA | ~10-14% |
| 5 | Blue Cross Blue Shield (varies by state) | Commercial | ~8-12% |
Important note: Denial rates vary significantly by state, plan type, and medical specialty. These are national averages.
Why Medicare Advantage Denies So Many Claims
Medicare Advantage plans are private insurance companies that contract with Medicare. They get paid a fixed amount per patient by the government. Their profit comes from spending less than they receive.
That creates an incentive to deny, delay, or down-code claims.
| Reason for MA Denials | Why It Happens |
|---|---|
| Prior authorization | MA plans require auth for many services that Traditional Medicare does not |
| Medical necessity reviews | MA plans aggressively question inpatient stays and expensive procedures |
| Network disputes | “Out of network” denials even for emergency care |
| Coding down-coding | MA plans often down-code E/M levels to pay less |
| Documentation demands | MA requests additional records to delay payment |
Real Data: Medicare Advantage Denial Rates vs. Traditional Medicare
A 2024 government report found:
| Metric | Medicare Advantage | Traditional Medicare |
|---|---|---|
| Denial rate for appealed claims | 66% of denials upheld | 29% of denials upheld |
| Prior authorization denials | 3-5% of requests | <1% |
| Patient appeal success rate | Only 1-2% of patients appeal | N/A |
Key takeaway: Not only do MA plans deny more claims, but their denials are also more likely to be upheld when appealed.
The “Worst” Payer by Specialty
Denial rates also depend heavily on your medical specialty.
| Specialty | Payer with Highest Denial Rate |
|---|---|
| Mental/Behavioral Health | UnitedHealthcare (MA + commercial) |
| Physical Therapy / Rehab | Humana (MA) |
| Durable Medical Equipment (DME) | Cigna |
| Cardiology | Aetna (prior auth intensive) |
| Primary Care | Blue Cross Blue Shield (varies by state) |
| Emergency Medicine | Medicare Advantage (medical necessity) |
How to Protect Your Practice from High-Denial Payers
You can’t always choose which insurance your patients have. But you can protect your revenue.
Strategy 1: Know Your Top Denial Payers
Run a report in your practice management system. Sort denials by payer. Which one is #1?
Example:
- Payer A: 3% denial rate → Keep as is
- Payer B: 15% denial rate → Investigate immediately
Strategy 2: Adjust Your Processes for High-Denial Payers
| Payer | Extra Step to Take |
|---|---|
| UnitedHealthcare MA | Verify coverage twice: at scheduling AND at check-in |
| Humana MA | Document medical necessity in extreme detail |
| Cigna | Check DME and therapy limits before service |
| Aetna | Get prior authorization in writing, not just verbally |
Strategy 3: Appeal Every Denial (Especially with MA)
Most providers give up after one denial. That’s a mistake.
| Denial Type | Appeal Success Rate |
|---|---|
| First-level appeal (reconsideration) | 40% overturn rate |
| Second-level appeal (peer-to-peer) | 50%+ overturn rate |
| External review (independent) | 60%+ overturn rate for MA plans |
The problem: Only 1-2% of patients appeal MA denials. Your practice can appeal on their behalf (with patient permission).
Strategy 4: Consider Payer Contract Negotiation
If a payer has a consistently high denial rate for your specialty:
| Option | What to Do |
|---|---|
| Renegotiate | Ask for higher rates to offset denial losses |
| Add appeal language | Require payer to pay for certain services without auth |
| Terminate contract | Only if you have enough other payers |
Pro tip: Before terminating, see what percentage of your revenue comes from that payer. Don’t cut off 40% of your income.
How All State RCM Helps You Beat High-Denial Payers
We don’t just submit claims – we actively manage denials, especially from difficult payers.
| High-Denial Payer | Our Strategy |
|---|---|
| UnitedHealthcare MA | We verify benefits twice, document everything, appeal every denial |
| Humana MA | We pre-check medical necessity documentation before claim submission |
| Cigna | We track service limits and warn you before you hit them |
| Aetna | We handle prior authorizations and track expiration dates |
| All Medicare Advantage | We don’t give up on first denial. We appeal, escalate, and fight. |
The result: Our clients experience <1% rejection rates and 97% reimbursement – even with high-denial payers.
