What is the appeals process for denied claims with Kaiser Permanente?
Short answer
Insurance question
When Kaiser Permanente denies a claim, you have the right to appeal. The process has two levels: an internal appeal (reviewed by Kaiser) and, if that fails, an independent external review (reviewed by a neutral third party). ACA law guarantees both rights for most plans. Your denial notice will include instructions and deadlines — act promptly.
This is an independent research summary, not official coverage information. Your plan is the final word.
Key facts
ACA guarantees the right to both an internal appeal and an independent external review for most plan types.
Expedited appeals for urgent situations must receive a response within 72 hours under federal law.
External independent review decisions are binding on the insurer — Kaiser must comply if the IRO rules in your favor.
Here's the nuance
A one-liner rarely tells the whole story. This is the honest detail behind the short answer above.
A claim denial from Kaiser Permanente does not have to be the final word. The ACA and federal law give you the right to appeal, and Kaiser is required to provide you with clear instructions for doing so in every denial notice you receive.
The first step is the internal appeal. When you receive a denial — whether for a service, a referral, a prescription, or a post-service claim — you typically have a set number of days to file an internal appeal (often 180 days from the denial date, but check your specific notice). Submit your appeal in writing to Kaiser's appeals department. Include a letter explaining why you believe the denial was incorrect, supporting documentation from your physician (medical records, a letter of medical necessity, relevant clinical guidelines), and a copy of the original denial notice. Kaiser is required to review your appeal and provide a written decision within specific regulatory timeframes — generally 30 days for pre-service appeals, 60 days for post-service claims, and 72 hours (or faster) for urgent care appeals.
If the internal appeal is still denied, you have the right to an independent external review conducted by an accredited independent review organization (IRO) — not affiliated with Kaiser. The external reviewer evaluates whether the denial was consistent with your plan terms and medical evidence. Their decision is binding on Kaiser. You generally have 4 months from the date of Kaiser's final internal denial to request an external review.
For Medicare Advantage members, the appeals process follows Medicare's own structure, which includes a redetermination by Kaiser, then an independent review entity (IRE) review, and further escalation through the Medicare appeals system if needed. Kaiser must provide specific Medicare appeals instructions with every coverage denial for Medicare plans.
For urgent situations — where waiting could seriously jeopardize your health — you can request an expedited appeal, and Kaiser must respond within 72 hours. You can also file a complaint with your state insurance commissioner or contact CMS if you believe Kaiser is not following required appeals procedures.
The key points
The handful of things that decide the answer — skim these if you only read one section.
You have the right to an internal appeal
Every denial comes with the right to an internal appeal — a re-review by Kaiser. Submit in writing with supporting medical documentation. Deadlines are on your denial notice, typically 180 days.
External independent review is a federal right
If the internal appeal fails, you can request an independent external review by an accredited third party. Their decision is binding on Kaiser. You generally have 4 months from the final internal denial to request it.
Include a letter of medical necessity from your doctor
A physician letter explaining why the service is medically necessary — and referencing relevant clinical evidence or guidelines — significantly strengthens your appeal.
Urgent appeals have a 72-hour response requirement
If delaying care would seriously harm your health, request an expedited appeal. Kaiser must respond within 72 hours. For emergencies, use the ER first and appeal the coverage question afterward.
Medicare members follow a separate appeals track
Kaiser Medicare Advantage members appeal through the Medicare appeals system: redetermination → IRE review → ALJ hearing → Medicare Appeals Council → federal court. Kaiser's denial notice for Medicare members will include the specific steps.
Confirm before you rely on this
Coverage varies by plan — this is not official
Coverage rules, benefit tiers, and medical-necessity criteria change often and differ by plan type, state, employer, and your specific policy. This page is a general, independent research summary — it is not official information from any insurer, not a benefits determination, and not financial or insurance advice.
Verify your exact coverage by calling the member number on your insurance card or checking your plan documents before you rely on any answer here.
Frequently Asked Questions
Your denial notice will include instructions for filing an internal appeal, including the mailing address or online portal for submissions, the deadline, and the information to include. Generally, you submit a written appeal letter, copies of relevant medical records, and a letter of medical necessity from your physician. You can also contact Kaiser member services for guidance on starting the appeal. Keep copies of everything you submit and note the date of submission.
For pre-service appeals (requests for care not yet received), Kaiser typically must respond within 30 days. For post-service claims (services already received), the deadline is generally 60 days. For urgent or expedited appeals where waiting could harm your health, Kaiser must respond within 72 hours. These are regulatory requirements under ACA and CMS rules. If Kaiser misses the deadline, contact your state insurance commissioner.
If Kaiser upholds the denial after internal review, you have the right to an independent external review. You request this through Kaiser's appeals department or through your state insurance commissioner's office. An accredited, independent review organization (IRO) evaluates your case — they are not affiliated with Kaiser. If the IRO decides in your favor, Kaiser must comply. You generally have 4 months from Kaiser's final denial to request external review.
Yes — Medicare Advantage members have their own multi-level appeals process. Start with a redetermination request to Kaiser (must be filed within 60 days of the denial). If denied, escalate to an Independent Review Entity (IRE). Further escalation options include an Administrative Law Judge (ALJ) hearing, the Medicare Appeals Council, and ultimately federal court. Each level has specific deadlines — review your denial notice for Medicare-specific appeal instructions.
Several free resources can help. Your state's insurance commissioner can assist with complaints about Kaiser's appeals process. State-funded insurance assistance programs (SHIP counselors for Medicare members) provide free guidance. Patient advocates and healthcare attorneys can help with complex cases. You can also contact CMS at 1-800-MEDICARE for Medicare-specific issues or the CMS external appeals guidance line for ACA plan issues.
Reviewed by
Curex Editorial TeamReviewed for accuracy
Last reviewed July 2026
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This page is independent research, not a benefits determination — your insurer's answer is the one that counts.
This content is for general informational purposes only. It is not official coverage information, a benefits determination, or financial or insurance advice. Coverage rules, benefit tiers, and medical-necessity criteria change often and vary by plan, state, and effective date — always verify your specific benefits directly with your insurer before making any decision.
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