CPT 74177 CT Abdomen/Pelvis Denied by Humana? Appeal Guide & Letter Template

Imaging · 7 min read ·

Why Humana Denies CPT 74177 (CT Abdomen and Pelvis with Contrast)

Humana denies CPT 74177 claims for several documented reasons. Understanding the specific denial reason on your Explanation of Benefits (EOB) is the critical first step before writing your appeal.

Common Denial Reasons for CPT 74177

Medical Necessity Not Established (CO-50, CO-236)
Humana determines that ct abdomen/pelvis does not meet their internal clinical criteria for your diagnosis. For imaging procedures like ct abdomen/pelvis, Humana typically requires documentation of failed conservative treatment (4-6 weeks minimum), specific clinical findings on physical exam, and a clear diagnostic question that cannot be answered by less expensive imaging modalities. If an X-ray or ultrasound could reasonably answer the clinical question, the advanced imaging may be denied.

Prior Authorization Not Obtained (CO-15, CO-197)
Most Humana plans require prior authorization for CPT 74177 (CT Abdomen and Pelvis with Contrast). If the procedure was performed without prior auth, the claim will be denied regardless of medical necessity. However, you may be able to obtain retroactive authorization, especially if the service was urgent or medically necessary. Check your specific plan's policies on retro-auth at humana.com/provider.

Conservative Treatment Not Exhausted (CO-50)
Humana may require 4-6 weeks of conservative management (physical therapy, activity modification, NSAIDs) before approving advanced imaging. If the patient has red flag symptoms (neurological deficits, suspected fracture, cancer history), conservative treatment requirements may be waived — but this must be clearly documented.

Documentation Insufficient (CO-16, CO-252)
Clinical documentation submitted does not support the medical necessity for ct abdomen/pelvis. Humana requires specific elements that demonstrate the procedure meets their coverage criteria.

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Humana Denial Rate Statistics

Understanding how often Humana denies claims — and how often those denials are overturned — can help you decide whether to appeal.

| Metric | Data |
|--------|------|
| Humana Overall Denial Rate | ~17% for Medicare Advantage initial denials |
| Industry Average Denial Rate | 19% of in-network claims denied across HealthCare.gov plans (2023) |
| % of Denials Appealed | Less than 1% of denied claims are appealed by consumers |
| % of Appeals Overturned | 44% of appealed denials are overturned at internal appeal |
| Medicare Advantage Overturn Rate | 57% of MA denials overturned on appeal |
| Cost to Rework a Denied Claim | $25 to $181 per reworked claim |

Sources: KFF analysis of CMS QHP Transparency Data (2023), published Jan 2025; Health Affairs, "Medicare Advantage Denies 17 Percent of Initial Claims" (2025)

The key takeaway: The vast majority of denied claims are never appealed. But when providers do appeal, nearly half succeed. For a ct abdomen/pelvis with CPT 74177, the reimbursement at stake typically makes the appeal worth pursuing.

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Step-by-Step: How to Appeal a CPT 74177 Denial from Humana

Step 1: Identify the Exact Denial Reason

Read your EOB or remittance advice carefully. Look for:


If the denial letter references a specific Humana medical policy number, request a copy of that policy. You are legally entitled to this under ERISA §503 (employer plans) or ACA §2719 (individual/marketplace plans).

Step 2: Review Humana's Coverage Criteria

Humana publishes medical coverage policies at humana.com. For Medicare Advantage members, also check CMS NCDs and LCDs at cms.gov/medicare-coverage-database, searching by CPT 74177. Humana typically follows CMS criteria for MA members.

Compare the criteria point-by-point against your clinical documentation. Identify exactly which criterion Humana claims was not met.

Step 3: Gather Supporting Documentation

For a CPT 74177 appeal, you will need:


Step 4: Write Your Appeal Letter

Your appeal letter should include:


Pro tips for CPT 74177 appeals to Humana:

Step 5: Submit the Appeal Within the Deadline

| Appeal Detail | Humana |
|--------------|---------------|
| Appeal Window | 60 days for standard; 72 hours for expedited; Medicare Advantage has specific CMS timelines |
| Submit Appeals To | Humana Appeals, P.O. Box 14546, Lexington, KY 40512 |
| Appeals Fax | 1-877-260-2837 |
| Provider Portal | humana.com/provider |

Important: Always send appeals via certified mail or fax with confirmation. Keep copies of everything.

Step 6: Request a Peer-to-Peer Review

For CPT 74177 denials based on medical necessity, request a peer-to-peer review between the ordering/performing physician and Humana's medical director. This is often the most effective intervention — many denials are overturned during peer-to-peer without a formal written appeal.

Contact Humana at 1-800-523-0023 to schedule.

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Appeal Deadlines and Key Contacts for Humana

| Resource | Details |
|----------|---------|
| Prior Auth Phone | 1-800-523-0023 |
| Appeals Mailing Address | Humana Appeals, P.O. Box 14546, Lexington, KY 40512 |
| Appeals Fax | 1-877-260-2837 |
| Provider Portal | humana.com/provider |
| Appeal Deadline | 60 days for standard; 72 hours for expedited; Medicare Advantage has specific CMS timelines |

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Frequently Asked Questions

How long does it take Humana to process a CPT 74177 appeal?
Humana must respond to standard appeals within 30-60 days (varies by plan type and state). For urgent/expedited appeals involving active treatment, the response time is 72 hours under federal regulations.

Can I appeal a CPT 74177 denial if the prior authorization was not obtained?
Yes. You can request retroactive authorization for many procedures, especially if the service was medically necessary and the failure to obtain prior auth was administrative. Include documentation explaining why prior auth was not obtained and evidence of medical necessity.

What if Humana denies my appeal?
You have the right to an external independent review. Under ACA Section 2719 and ERISA regulations, an independent review organization (IRO) will evaluate your appeal. External reviewers overturn a meaningful percentage of upheld internal denials. You can also escalate to your state insurance commissioner.

What denial codes are most common for CPT 74177?
The most common CARC codes for ct abdomen/pelvis denials are CO-50 (medical necessity not met), CO-15 (prior auth required), CO-16 (missing information), and CO-197 (precertification/authorization not obtained). Each requires a different appeal strategy.

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