Written by Mei Ling
Published 16 October 2026 | Last updated -
Who we are: Home Care Apps Team
Quick answer: A guarantee letter for hospital admission (GL) is your insurer's letter to the hospital saying it will pay the eligible part of the bill directly, so admission is cashless. It is not a promise to pay everything, and if none is issued you may pay first and claim. Facts checked October 2026.
Key points
- A guarantee letter lets the hospital bill the insurer directly.
- It is not full payment. Deductibles and non-covered items remain.
- Check the final bill and final letter before discharge.
- If it is rejected, you may pay first and claim.
What is a guarantee letter for hospital admission?
A guarantee letter (GL) is a letter from your insurer or takaful operator to a hospital, so the hospital can bill the insurer directly for the eligible costs of your stay. The insurer issues it, and the hospital usually requests it for you. AIA describes it as "a credit facility agreement between AIA and its panel hospitals" (AIA). The name varies. People also search for it as a letter of guarantee for hospitalisation, and Prudential calls its version a Pre-Authorisation Letter (Prudential). Using one at a panel hospital is called cashless admission, because the insurer pays the eligible hospital expenses directly (BNM FAQ, C11A).
This page covers the insurer's letter at private hospitals. It does not cover payment letters for government hospital fees, which some people also search for under the same words. We read the guarantee letter pages of AIA, Great Eastern, Allianz and Prudential, and the BNM MediAsas FAQ.
Do I need a guarantee letter before surgery, and how do I get one?
You do not need a guarantee letter to be treated, but you need one for cashless admission, so ask early. BNM's FAQ says that if none is issued, you may still be treated and claim on a pay-and-claim basis (BNM FAQ, C16). The usual steps, from the insurer pages:
- Show your medical card and ID at the hospital admission counter.
- Your doctor completes the admission section of the request form, and the hospital sends it to the insurer.
- The insurer checks the policy and benefits, then sends an initial guarantee letter to the hospital, or declines.
- With the initial letter, admission goes ahead.
- After treatment, the hospital sends the itemised final bill, and the insurer issues a final letter showing what it covers.
- You pay what the letter does not cover before you leave.
Steps 1 to 3 follow Great Eastern and AIA, step 4 follows BNM's FAQ (C11A), and steps 5 and 6 follow AIA. See also what to do when a family member is admitted.
What does a guarantee letter for a medical card cover?
It covers the eligible costs of an admission at a panel hospital, within your policy terms. AIA lists doctor charges, hospital charges (lab, equipment, supplies, pharmacy) and other treatment-related charges as typically coverable, and says the facility is only for hospitalisation claims, not for outpatient procedures. Great Eastern says it is not available for any admission or treatment by a non-panel specialist, and lists outpatient, pre-hospitalisation and post-hospitalisation treatment among the reasons a request can be declined.
AIA adds that "the issuance of a Guarantee Letter and the payment of claims are subject to benefit entitlement based on policy or certificate terms". So a guarantee letter lets the hospital bill the insurer. It does not promise to pay everything.
Why can a guarantee letter cover only part of the bill?
Because your policy still applies, so you can owe a share of the bill. The insurer pages give four common reasons:
- Deductible or co-insurance. AIA says co-insurance is "a percentage of the medical expenses that you have to pay".
- Non-coverable items. AIA gives examples such as admission kits, medical report fees, registration fees and vitamins.
- A higher room. Prudential says a room above your room and board benefit is allowed, but you pay the difference.
- A deposit. Great Eastern says most hospitals still ask for an admission deposit, refunded after non-covered items are deducted.
BNM gives an example of a RM6,000 bill: the customer pays RM500 at a Preferred In-Network hospital and RM1,700 at an out-of-network one (RM500 deductible plus RM1,200 co-insurance). These are pilot figures and may change (BNM FAQ, B3).
Why check the final bill and final guarantee letter before discharge?
Because the final letter, not the first one, shows what the insurer will actually pay. BNM's FAQ says to "review your final hospital bill and final Guaranteed Letter carefully before discharge", and to pay any amounts not covered (BNM FAQ, C11A).
AIA says the initial letter depends on the treatment actually needed, and may be reviewed if the treatment differs. It says the final letter states the coverable and non-covered amounts, and advises you to ask for the itemised bill, check charges and ward visits, and ask for corrections straight away.
Allow time. For straightforward cases, once the insurer has the complete papers, Allianz says 45 minutes for its letter (Allianz), and Great Eastern says 75 minutes for a final letter. Great Eastern says the hospital's own discharge steps can take a few hours, and incomplete papers take longer. See our hospital discharge checklist.
What happens if the guarantee letter is rejected?
You are asked to pay the hospital and claim back afterwards. Great Eastern says a declined request goes to the hospital, which advises you to pay and claim. AIA lists reasons such as a policy not in force, exclusions, waiting periods, treatment that can be done as an outpatient, or a check of an undeclared pre-existing condition. At Gleneagles Penang, a reject letter means the hospital collects the deposit from you (Gleneagles Penang).
Ask the insurer or the hospital's insurance desk for the reason. BNM says you may still go ahead with treatment and pay upfront (BNM FAQ, C16). Ask your doctor about timing, and never delay urgent care. See why claims get rejected and the documents needed to claim.
How does a guarantee letter work under MediAsas?
In the pilot, a guarantee letter is available at Preferred In-Network providers, and you request it by submitting a pre-authorisation request through the provider. Approval is subject to assessment and the policy or certificate terms (BNM FAQ, C14 and C15). MediAsas is voluntary insurance and takaful from licensed insurers. As of October 2026 it is in a pilot in the Klang Valley, with a nationwide launch planned for January 2027 (Malay Mail, 9 October 2026), so details may change.
| Point | Cashless (guarantee letter) | Pay and claim |
|---|---|---|
| Where | Panel hospital (MediAsas: Preferred In-Network provider) | Non-panel or out-of-network hospital, or no letter issued |
| Who pays the hospital first | The insurer, for eligible costs | You |
| What you do | Show the card, then review the final bill and final letter | Pay, then send the claim form with itemised bills and medical reports |
| What you may still pay | Deductible, co-payment and non-covered items | The same, plus the whole bill until you are reimbursed |
| MediAsas pilot rule | Request through the provider (C14, C15) | Out-of-network: you may need to pay first (C11B) |
What to do next
- Ask your insurer or agent whether your hospital is on the panel and a letter is available for the planned treatment.
- Ask the hospital's insurance desk to request the letter early.
- Keep the final letter and the itemised bill.
- Use our 10 questions to ask your insurer before surgery.
- If your doctor suggests nursing at home, send us an enquiry.
FAQ
What is the difference between an initial and a final guarantee letter?
The initial letter lets admission go ahead, and the final letter comes after the final bill. AIA says the initial letter depends on the treatment actually needed, while the final letter means the hospitalisation claim is approved for the covered expenses.
What happens if there is no guarantee letter for hospital admission?
You may still be treated, but you pay the expenses upfront and claim later under the policy terms. BNM's FAQ says this for MediAsas (C16). Ask your insurer which documents the claim needs.
Does a guarantee letter cover home nursing after discharge?
The pages we read do not say so. AIA says the facility is only for hospitalisation claims, not for outpatient procedures, and Great Eastern lists post-hospitalisation treatment among decline reasons. BNM's FAQ describes letters only for Preferred In-Network providers and does not mention home nursing, so ask your insurer.
How long is a guarantee letter valid?
Great Eastern says an approved letter is valid for 30 days from the issue date. Other insurers may differ, and we found no validity period on the AIA, Allianz or Prudential pages we read. Ask your insurer.
How we can help
Home Care Apps arranges registered nurse home visits across Peninsular Malaysia, subject to nurse availability in your area. We are not a panel provider of any insurer or takaful operator and do not offer cashless billing, so ask your insurer whether a home visit can be claimed back. Send an enquiry, try the free care assessment or see our services.
Sources
- Bank Negara Malaysia, MediAsas Frequently Asked Questions, Version 1: Pilot Programme, 29 July 2026. PDF. Items B3, C11A, C11B, C14 to C16 and C22.
- Bank Negara Malaysia, Medical and Health Insurance/Takaful (MediAsas). bnm.gov.my/mhit, page read 16 October 2026 (no newer FAQ found).
- AIA Malaysia, "FAQs: Claims & Guarantee Letters". Link, undated page (copyright 2026), read 16 October 2026.
- Great Eastern Life Malaysia, "Health Care Card and Guarantee Letter (GL)". Link, undated page (copyright 2026), read 16 October 2026.
- Allianz Malaysia, "Life Claims FAQ". Link, undated page (copyright 2026), read 16 October 2026.
- Prudential Malaysia, "Medical Card Services FAQs", page metadata date 23 September 2026. Link.
- Gleneagles Hospital Penang, "Billing & Finance: Insurance and Billing". Link, undated page, read 16 October 2026. One hospital only; other hospitals differ.
- Malay Mail, "Anwar: Voluntary medical insurance MediAsas to kick off in 2027, EPF Akaun Sejahtera can pay premiums", 9 October 2026. Link.
Note
This is general information, not medical, financial or legal advice, and Home Care Apps is a home nursing provider, not an insurer, takaful operator or insurance agent.