Medicare Denied Claim: Too Many Visits or Services

What This Means

Medicare reviewed your claim and decided that the number of visits or services was more than what it considers justified based on the information submitted. On your notice this usually appears as CARC code CO-151, “the payer deems the information submitted does not support this many/frequency of services,” CO-119, “benefit maximum for this time period or occurrence has been reached,” or CO-273, “coverage/program guidelines were exceeded.” This is especially common with physical therapy, occupational therapy, and speech-language pathology services, but it can happen with any type of care.

These codes can describe different problems: unsupported frequency, incorrect billing, or an actual benefit limit. More documentation may help with medical necessity, but it does not automatically override a coverage limit. Check the full notice before deciding how to respond.

Why This Happens

• You reached Original Medicare’s outpatient therapy threshold. In 2026, the annual KX thresholds are $2,480 for physical therapy and speech therapy combined, and $2,480 for occupational therapy. Your provider must use a special modifier (KX) to confirm medical necessity beyond this point, and claims above the $3,000 targeted medical review threshold may face additional review.
• The documentation did not support the frequency. Medicare expects your provider to show why each visit was necessary. If progress notes are vague or do not clearly connect the visits to your treatment goals, the claim may be denied.
• A billing error occurred. Sometimes claims are submitted with incorrect units or duplicate entries, triggering a frequency-based denial.
• Medicare applied a coverage limit. Some services have specific frequency limits under National or Local Coverage Determinations. For example, certain preventive screenings are only covered once per year or once per lifetime.

Should You Appeal?

What To Do Next

1. Check for billing errors first. Call your provider’s billing office and ask if the claim was submitted correctly. Missing modifiers, duplicate claims, or incorrect units may be correctable. KX should be added only when the records support the coverage requirements. Do not let a correction request delay an appeal past the notice deadline.
2. Ask your therapist or doctor for detailed documentation. If the denial was based on medical necessity, ask your provider to write a letter explaining why each visit was needed. This should include your diagnosis, treatment goals, progress notes, and why additional visits were necessary.
3. Review your denial notice. It will specify the reason code and may reference a specific coverage limit. Understanding the exact reason will help you respond correctly.
4. File your appeal with supporting records. Include your provider’s letter, progress notes, and any relevant treatment plans. For Original Medicare, submit to the Medicare Administrative Contractor listed on your MSN. For Medicare Advantage, follow the instructions on your denial notice.
5. Discuss continued care and payment before the next visit. Ask your provider what care is needed and whether you could owe for it while the appeal is pending. An appeal does not guarantee payment. A CO adjustment is assigned to the provider, so ask the billing office to explain any bill rather than assuming the denied amount is yours.

Sources

• CMS: Jimmo Settlement — skilled maintenance therapy does not require improvement; other coverage requirements still apply.

• 42 CFR 405.942 — Original Medicare redetermination filing period and good-cause extensions.

• CMS: Therapy Services (KX modifier thresholds)

• X12: Claim Adjustment Reason Codes — official CARC code definitions

• KFF: Medicare Advantage Insurers Made Nearly 53 Million Prior Authorization Determinations in 2024

• Medicare.gov: Your Medicare Rights & Appeals

Frequently Asked Questions