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48 patient guides · Updated October 16, 2026Billing discrepancies
What to Do When Your Medical Bill Is Too High
Check a high medical bill for errors, compare insurance processing, explore financial assistance, and ask about manageable payment options.
Read the guide →PATIENT GUIDEHow to Handle an Out-of-Network Medical Bill
Review an out-of-network bill, check surprise-billing protections and network records, and learn what to ask your provider and health plan.
Read the guide →PATIENT GUIDEExplanation of Benefits vs. Medical Bill
Understand how an explanation of benefits differs from a medical bill, compare patient responsibility, and resolve mismatched balances.
Read the guide →PATIENT GUIDEEOB Says You Owe $0 but You Got a Bill
Got a medical bill when your EOB says you owe nothing? Match the claim, check payments and adjustments, and ask for a written account review.
Read the guide →PATIENT GUIDEMedical Bill Higher Than Your EOB
Learn what to check when a provider bill exceeds EOB patient responsibility, including multiple claims, adjustments, and balance-billing concerns.
Read the guide →PATIENT GUIDECan a Doctor Bill You After Insurance Denies a Claim?
A denied claim does not automatically establish patient liability. Learn which plan, contract, billing, and notice details to check before paying.
Read the guide →PATIENT GUIDEHospital Billing You Before Insurance Processes the Claim
Find out what to ask when a hospital bill arrives before insurance processing finishes, and how to confirm claim status and request a billing hold.
Read the guide →PATIENT GUIDEDuplicate Charges on a Medical Bill
Learn how to distinguish duplicate medical charges from separate services, request a billing review, and confirm corrections or refunds.
Read the guide →PATIENT GUIDEMedical Bill for Services You Never Received
Review an unfamiliar medical bill, verify the provider and records, and learn what to do about billing mistakes or possible medical identity theft.
Read the guide →PATIENT GUIDEBalance Billing: What It Is and When to Dispute It
Understand balance billing, check network and surprise-billing protections, and learn what to ask before disputing an additional medical charge.
Read the guide →PATIENT GUIDEDoctor Billed Insurance Too Late and Now Bills You
Check a timely-filing denial, who was responsible for submitting the claim, and whether provider contract rules limit what can be billed to you.
Read the guide →PATIENT GUIDEMedical Bill Sent to Collections While Insurance Is Pending
Learn how to coordinate a pending insurance claim with a medical debt dispute, preserve validation deadlines, and request an account review.
Read the guide →PATIENT GUIDEInsurance Paid but Provider Still Says You Owe
Reconcile an insurer payment with a provider bill, check remaining cost-sharing and posting errors, and request a corrected balance or refund.
Read the guide →PATIENT GUIDEHow to Request and Check an Itemized Medical Bill
Request an itemized medical bill, understand service lines and payments, and organize questions about charges you do not recognize.
Read the guide →Denial reasons
How to Appeal a Medical Necessity Denial
Understand a medical necessity denial, request the clinical criteria, and work with your clinician to prepare evidence for an appeal.
Read the guide →PATIENT GUIDEWhat to Do When a Claim Is Denied for Prior Authorization
Learn what to check when insurance denies a claim for prior authorization, including approval records, provider corrections, and appeal options.
Read the guide →PATIENT GUIDEHow to Fix a Medical Claim Coding Error
Find the right billing questions to ask about a possible coding error, request a provider review, and track a corrected insurance claim.
Read the guide →PATIENT GUIDEClaim Denied for Missing Referral
Check a missing-referral denial, distinguish referrals from prior authorization, and learn what to ask your primary care office and health plan.
Read the guide →PATIENT GUIDEClaim Denied for Coordination of Benefits
Learn how to resolve a coordination-of-benefits denial by verifying coverage dates, identifying payer order, and updating insurer records.
Read the guide →PATIENT GUIDEClaim Denied as Experimental or Investigational
Learn how to review an experimental-treatment denial, request the policy, and work with your clinician on evidence and appeal options.
Read the guide →PATIENT GUIDEClaim Denied as Not Covered by Your Plan
Learn how to investigate a noncovered-service denial, find the exclusion, check billing accuracy, and assess appeal or assistance options.
Read the guide →PATIENT GUIDEClaim Denied Because Coverage Was Inactive
Check an inactive-coverage denial against enrollment dates, member details, premium records, and employer or plan enrollment corrections.
Read the guide →PATIENT GUIDEClaim Denied as Duplicate
Learn why a claim may be marked duplicate, identify the original submission, and distinguish an insurer duplicate denial from duplicate patient charges.
Read the guide →PATIENT GUIDEClaim Denied for Missing Information
Find out which information a health plan needs, who should supply it, and how to track reprocessing without missing an appeal deadline.
Read the guide →Insurance companies
How to Appeal a UnitedHealthcare Denial
Find the right UnitedHealthcare appeal route for your plan, distinguish member appeals from provider disputes, and organize your denial evidence.
Read the guide →PATIENT GUIDEHow to Appeal an Aetna Denial
Use Aetna’s member claim-denial resources to find the correct appeal process, gather supporting evidence, and track receipt and review.
Read the guide →PATIENT GUIDEHow to Appeal a Cigna Denial
Find Cigna’s current member appeal resources, understand employer-plan and state differences, and prepare a focused coverage appeal.
Read the guide →PATIENT GUIDEHow to Appeal an Anthem Denial
Find the Anthem appeal instructions for your state and plan, avoid using another product’s form, and prepare a member coverage challenge.
Read the guide →PATIENT GUIDEHow to Appeal a Blue Cross Blue Shield Denial
Find your local BCBS company, identify the plan that issued the denial, and follow the correct member appeal instructions for your coverage.
Read the guide →PATIENT GUIDEHow to Appeal a Humana Denial
Use Humana’s official appeal resources and separate Medicare medical, drug, Medicaid, and other plan procedures before submitting your request.
Read the guide →PATIENT GUIDEHow to Appeal a Kaiser Permanente Denial
Separate Kaiser billing, service grievances, and coverage appeals; find the instructions for your region, plan, and benefit before filing.
Read the guide →PATIENT GUIDEHow to Appeal a Medicare Advantage Denial
Understand a Medicare Advantage reconsideration, the current initial appeal window, urgent review, and the next independent review level.
Read the guide →Procedure-specific
MRI Denied by Insurance
Insurance denied your MRI? Find out what to ask the plan, what your clinician can send, and how to follow the appeal instructions.
Read the guide →PATIENT GUIDECT Scan Denied by Insurance
Review a CT denial by checking the exact scan, authorization, clinical documentation, and plan policy before choosing a correction or appeal.
Read the guide →PATIENT GUIDEEmergency Room Bill Insurance Did Not Cover
Understand the difference between an ER coverage denial and an out-of-network balance, and learn which records and protections to check.
Read the guide →PATIENT GUIDEPhysical Therapy Visits Denied by Insurance
Check therapy denials for visit limits, authorization, coding, and clinical evidence, with a separate explanation of Original Medicare coverage.
Read the guide →PATIENT GUIDELab Test Not Covered by Insurance
Investigate a lab test denial by checking the exact test, diagnostic or screening purpose, lab network, submitted codes, and plan requirements.
Read the guide →PATIENT GUIDESurgery Denied by Health Insurance
Find out how to review a surgery denial, coordinate authorization and clinical records, and protect appeal rights before or after care.
Read the guide →PATIENT GUIDEAnesthesia Bill Not Covered by Insurance
Check an anesthesia bill for separate claims, network processing, coding errors, and federal surprise-billing protections in covered settings.
Read the guide →PATIENT GUIDESpecialty Medication Denied by Insurance
Check a specialty drug denial for formulary, authorization, step therapy, benefit channel, and prescriber evidence before requesting review.
Read the guide →Appeals and tools
What to Do When Your Health Insurance Claim Is Denied
Learn how to read a claim denial, check for billing errors, gather records, and choose between a corrected claim and an insurance appeal.
Read the guide →PATIENT GUIDEHow to Appeal a Health Insurance Denial
Prepare a health insurance appeal with the right records, a focused explanation, proof of submission, and a plan for follow-up.
Read the guide →PATIENT GUIDEFree Health Insurance Appeal Letter Template
Copy a free health insurance appeal letter template. Learn what to include, what evidence to attach, and how to tailor it to the reason your claim was denied.
Read the guide →PATIENT GUIDEHealth Insurance Appeal Deadlines Explained
Learn how to find your insurance appeal deadline, distinguish filing and decision timelines, and avoid relying on a rule for the wrong plan.
Read the guide →PATIENT GUIDEHow to Negotiate a Medical Bill
Prepare for a medical bill negotiation, explore assistance and discounts, and request clear written terms before agreeing to a payment plan.
Read the guide →PATIENT GUIDEDenied Insurance Claim Checklist
Use a practical checklist to organize a denied claim, gather evidence, protect appeal deadlines, and track insurance and provider follow-up.
Read the guide →PATIENT GUIDEHow to Dispute an Incorrect Medical Bill
Build a clear medical billing dispute, separate provider errors from insurer decisions, and preserve collection and appeal deadlines.
Read the guide →PATIENT GUIDEWho Can Help Appeal a Denied Medical Claim?
Compare help from clinicians, benefits teams, public programs, patient advocates, and paid services when a health insurance claim is denied.
Read the guide →General U.S. information, reviewed October 16, 2026. Coverage and appeal rules depend on your plan and circumstances. These guides do not provide medical or legal advice or promise an outcome.