EZAppeal Blog

Expert guides on insurance appeals, denial management, and prior authorization for billing professionals and healthcare providers.

Appealing Denied Spinal Fusion Surgery: A Billing Team Guide

Appeals · 6 min read · April 1, 2026

How billing and UR teams appeal denied spinal fusion: document failed conservative care and functional limits, build the letter on the plan's written criteria, and meet Medicare, Medicare Advantage and commercial appeal deadlines.

MA01 Remark Code: What It Means and When to Appeal (2026)

Denial Help · 5 min read · March 31, 2026

MA01 is Medicare's appeal-rights alert, not a denial. Read the CARC beside it, then choose a redetermination (120 days), a reopening, or a BCRC correction.

CO 11 Denial Code: What It Means & How to Fix It (2026)

Denial Help · 6 min read · March 31, 2026

CO 11 denial code means the diagnosis is inconsistent with the procedure. Learn what causes CARC CO 11, how to correct the claim, and when to appeal.

N479 Remark Code: What It Means & How to Respond (2026)

Denial Help · 5 min read · March 31, 2026

N479 means the payer is missing the primary payer's Explanation of Benefits on a coordination of benefits or Medicare Secondary Payer claim. How to resubmit with the primary's data, when it is not an appeal, filing limits and a documentation checklist.

CO 16 Denial Code: What It Means & How to Fix It (2026)

Denial Help · 6 min read · March 31, 2026

CO 16 denial code means the claim lacks information needed for adjudication. Learn what causes CARC CO 16, what additional info to submit, and how to appeal.

CO 50 Denial Code: What It Means & How to Fix It (2026)

Denial Help · 7 min read · March 31, 2026

CO 50 denial code means medical necessity not met. Learn what causes CARC CO 50, how to appeal it with documentation tips, and what the appeal letter must cover.

CO 97 Denial Code: What It Means & How to Fix It (2026)

Denial Help · 7 min read · March 31, 2026

CO 97 denial code means the benefit is included in another service (bundling). Learn what causes CARC CO 97, when to use modifier 59, and how to appeal.

State Insurance Commissioner Complaints: When and How to File

Education · 6 min read · March 5, 2026

When a practice should file a state insurance department complaint, which plans the state regulates, what to finish with the payer first and what to send.

Orthopedic Surgery Authorization Tips

Specialties · 6 min read · March 3, 2026

Get your orthopedic surgery approved faster with proven authorization tips. Avoid denials, reduce wait times, and streamline your insurance process today.

External Review for Denied Claims: A Guide for Billing Teams

Education · 6 min read · February 25, 2026

How external review works after internal appeals fail: which denials qualify, state vs federal processes, the filing window, and how billing teams build an IRO submission that answers the denial rationale.

Appeal Humana Nerve Conduction Study Denial — Letter Template & Codes

Denial Help · 8 min read · February 23, 2026

Humana denied a nerve conduction study? Appeal deadline, clinical criteria, CPT codes, and a letter template to overturn the denial.

Appeal Humana Wound Care Denial — Letter Template, Deadlines & CPT Codes

Denial Help · 7 min read · February 23, 2026

Humana denied wound care debridement? Appeal deadline, medical necessity criteria, CPT codes, and a letter template to overturn the denial.

Appeal Humana Power Wheelchair Denial — Letter Template & HCPCS Codes

Denial Help · 7 min read · February 23, 2026

Humana denied a power wheelchair claim (HCPCS K0856)? Appeal deadlines by plan type, Medicare's power mobility criteria for Medicare Advantage members, the records to send, and a letter template for billing staff.

Appeal Humana Home Health Denial — Letter Template & Deadlines

Denial Help · 7 min read · February 23, 2026

Humana denied home health services? Appeal deadline, homebound criteria, documentation needed, and a letter template to overturn it.

Humana Denied Skilled Nursing? Appeal Guide + Free Template (2026)

Denial Help · 7 min read · February 23, 2026

Humana denied SNF or skilled nursing coverage? Free appeal letter with Humana level-of-care criteria, Medicare skilled nursing rules, and exact filing deadlines.

Appeal Humana Cardiac Stress Test Denial — Letter Template & CPT Codes

Denial Help · 7 min read · February 23, 2026

How billing teams appeal a Humana cardiac stress test (CPT 93015) denial: symptom and risk documentation, deadlines by plan type, what to send and a fill-in appeal letter template.

Appeal Humana Knee Replacement Denial — Letter Template & CPT Codes

Denial Help · 7 min read · February 23, 2026

Humana denied total knee replacement? Appeal deadline, failed conservative treatment criteria, CPT codes, and a letter template to overturn it.

Appeal Humana Lumbar MRI Denial — Letter Template, Deadlines & CPT Codes

Denial Help · 7 min read · February 23, 2026

Humana denied a lumbar spine MRI (CPT 72148)? Appeal deadlines by plan type, the conservative-care and red-flag documentation reviewers look for, and a letter template for billing staff.

Appeal Cigna Hysterectomy Denial — Letter Template, Deadlines & CPT Codes

Denial Help · 7 min read · February 23, 2026

Cigna hysterectomy denial (CPT 58571)? For billing teams: appeal deadlines, medical necessity criteria, CPT codes, and an appeal letter template.

Appeal Cigna CPAP Machine Denial — Letter Template, Deadlines & HCPCS

Denial Help · 7 min read · February 23, 2026

Cigna denied a CPAP claim for HCPCS E0601? What the sleep study, AHI and adherence records need to show, appeal deadlines by plan type, and a fill-in appeal letter template for billing and practice staff.

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