IRDAI Cashless Authorization Format: The Standard Part C and Part D Letters Behind Your Hospital Cashless Claim

When you hand your health insurance card at a network hospital and walk out without paying the bill yourself, a specific paperwork trail makes that possible. Since 1 July 2019, that trail has followed a standard shape prescribed by the insurance regulator. IRDAI Circular Ref IRDA/HLT/REG/CIR/86/05/2019, dated 27 May 2019, revised the "Request for Cashless Hospitalization" form (Part C) and introduced a brand-new Part D, the standard cashless authorization letter that an insurer or third-party administrator must issue to a network hospital before treatment is approved.

Most policyholders never see these two documents, yet the numbers written on them decide how much of your bill the insurer actually pays and how much you settle at the discharge counter. This deep dive explains what the 2019 circular standardised, why the Part D authorization letter is the single most important piece of paper in a cashless claim, and how to read the figures on it before you sign the discharge summary.

The Rule / Product

IRDAI issued Circular Ref IRDA/HLT/REG/CIR/86/05/2019 on 27 May 2019 under its powers to protect policyholders, and set the effective date at 1 July 2019. The circular did two things. First, it revised the existing Part C, the form a hospital submits to request cashless treatment on your behalf. Second, it created Part D, a wholly new standard format for the cashless authorization letter that the insurer or TPA sends back to the hospital confirming what it will pay.

The critical instruction sits inside Part D. When the insurer authorises a cashless claim, the circular requires that a copy of the authorization be "simultaneously notified to the policyholder or claimant", so that you are told the package rate agreed with the network provider or the extent of the authorisation at the time it is granted. Any supplementary or additional authorisation issued later, for example when the treating doctor revises the estimate mid-admission, must also be notified to you. Before this 2019 rule, the authorisation flowed only between the TPA and the hospital, and patients frequently learned of a shortfall only at discharge.

The circular also fixed the physical presentation of the forms. It directs that the font size used in these forms must be no smaller than Times New Roman 10, and that the forms be clear and legible, while allowing insurers and TPAs to capture the data in OCR or machine-readable format and to add clauses consistent with their service-level agreements. These are small drafting rules, but they exist because unreadable, cramped authorisation letters had been a genuine grievance.

The Part C and Part D framework applies to indemnity health insurance policies serviced through the cashless route at network hospitals. It does not change your policy terms, your sum insured, or any sub-limit; it standardises how the authorisation that applies those terms is written down and communicated. The statutory anchor is IRDAI's mandate over health insurance servicing, later consolidated in the IRDAI (Protection of Policyholders' Interests, Operations and Allied Matters of Insurers) Regulations, 2024.

Why It Matters

The 2019 circular matters because the Part D letter is where your policy's fine print becomes a rupee figure for the first time. A policy might promise a sum insured of Rs 10 lakh, but the Part D authorisation for a specific admission might approve only Rs 1,80,000 against a hospital estimate of Rs 2,40,000, leaving a Rs 60,000 gap you must fund. Under the pre-1 July 2019 practice you might not have seen that gap until discharge day; under the current format you are entitled to see it when the authorisation is granted.

That timing changes your options. If you learn at admission that the co-payment, room-rent proportion or a sub-limit has cut the authorised amount, you can still choose a cheaper room category, question a non-payable item, or arrange funds calmly rather than under discharge-counter pressure. Every rupee the Part D letter does not authorise is a rupee that moves from the insurer's account to yours, so reading it early is not paperwork for its own sake, it is direct control over your out-of-pocket cost.

It also matters for disputes. Because the authorisation and every supplementary authorisation must be notified to you, you build a documented trail of exactly what the insurer approved and when. If a claim is later short-paid or a deduction is contested, that trail is the evidence you carry to the insurer's grievance cell or, if unresolved, to the Insurance Ombudsman. The standard format made in 2019 turned an opaque hospital-insurer exchange into something a policyholder can audit.

Worked Numbers

The figures below are illustrative arithmetic, not quoted premiums or approved rates, and they show how a Part C request becomes a Part D authorisation once policy terms are applied. Assume a family floater with a Rs 10 lakh sum insured, a 1% of sum insured daily room-rent capping, and a 10% co-payment. The patient is admitted for a procedure the hospital estimates at Rs 3,00,000, and chooses a room costing Rs 12,000 a day against an eligible limit of Rs 10,000 a day (1% of Rs 10 lakh).

Room rent capping triggers a proportionate deduction on associated charges because the patient occupied a room dearer than the policy allows. The eligible ratio is Rs 10,000 divided by Rs 12,000, or roughly 83.3%. Suppose the Rs 3,00,000 estimate splits into Rs 30,000 of room charges and Rs 2,70,000 of rent-linked charges such as surgeon fees, nursing and operation-theatre costs. Applying the 83.3% eligibility to the rent-linked portion gives approximately Rs 2,24,910, a proportionate cut of about Rs 45,090 before any co-payment.

In this illustration the Part D letter would authorise roughly Rs 2,21,419 and notify you that you owe about Rs 78,581 at discharge, even though your sum insured is Rs 10 lakh and nowhere near exhausted. None of that shortfall comes from the insurer refusing the claim; it all comes from three policy terms, the room-rent sub-limit, the co-payment and non-medical exclusions, being applied on the authorisation. You can model the room-rent effect for your own policy with the Oquilia room-rent impact calculator, estimate a likely payout with the claim estimator, and pressure-test whether your cover is large enough on the health insurance premium calculator.

The single most valuable habit the 2019 format enables is simple arithmetic at admission: take the hospital's Part C estimate, subtract the Part D authorised amount, and the difference is your cash outgo. If that difference looks wrong, you query it before, not after, treatment.

Pitfalls

The most common trap is the room-rent proportion shown above. A policyholder who upgrades from an eligible Rs 10,000 room to a Rs 12,000 room does not merely pay the Rs 2,000 daily difference; the roughly 83.3% eligibility ratio is applied to a wide basket of rent-linked charges, which is why a Rs 10,000-a-day overshoot can translate into a five-figure deduction on a single admission. Since the 2019 circular requires the authorised amount to be notified to you, this deduction should now be visible on the Part D letter rather than surfacing only at discharge.

A second trap is co-payment. A 10% or 20% co-pay is a fixed contractual share you pay on every claim, and it is applied after other deductions, so it stacks on top of room-rent proportioning rather than replacing it. Senior-citizen and some zone-based policies carry co-pays as high as 20%, which on a Rs 5,00,000 admission is a Rs 1,00,000 personal outgo regardless of sum insured.

The third trap is disease-wise sub-limits, where a policy caps, say, cataract or knee-replacement claims at a fixed figure irrespective of the sum insured; the Part D authorisation will reflect that cap even if the hospital bill is far higher. Fourth is the pre-existing disease waiting period, typically 24 to 48 months depending on the product, during which a claim for a declared PED can be refused or only partly authorised. Fifth is non-medical or consumable items, which insurers list as non-payable and strip out of the authorised amount even when the hospital bills them.

The defence against all five is the same and it depends on the 2019 rule: read the Part D letter, or ask the hospital insurance desk for it, at admission and at every revision, and reconcile it against your policy schedule before you consent to treatment.

FAQ

What is the difference between Part C and Part D under the 2019 circular?

Part C, revised by IRDAI Circular Ref IRDA/HLT/REG/CIR/86/05/2019 dated 27 May 2019, is the request for cashless hospitalisation that a network hospital submits to the insurer or TPA on your behalf. Part D, newly introduced by the same circular effective 1 July 2019, is the cashless authorization letter the insurer or TPA sends back stating how much it will pay, a copy of which must be notified to you.

Am I entitled to a copy of the cashless authorization letter?

Yes. The 2019 circular requires that when a cashless claim is authorised, the authorisation is simultaneously notified to the policyholder or claimant, including the package rate agreed with the network provider or the extent of the authorisation. Any supplementary or additional authorisation issued during the same admission must also be notified to you.

Why does the authorised amount differ from the hospital's estimate?

The Part C estimate is the hospital's gross figure, while the Part D authorised amount is that figure after your policy terms are applied, room-rent proportioning, co-payment, disease-wise sub-limits, waiting periods and non-medical exclusions. In the illustration above a Rs 3,00,000 estimate became a roughly Rs 2,21,419 authorisation once a 1% room-rent sub-limit and a 10% co-pay were applied.

Does the 2019 circular change my sum insured or sub-limits?

No. IRDAI Circular Ref IRDA/HLT/REG/CIR/86/05/2019 standardises how the cashless request and authorisation are written and communicated; it does not alter your sum insured, sub-limit structure, co-payment or waiting periods, which are set by your specific policy contract.

What should I do if the Part D authorisation looks too low?

Query it immediately with the hospital insurance desk and the TPA, ideally before treatment begins, since the 2019 rule entitles you to see the authorised amount at the time it is granted. Ask which policy term caused each deduction, and if you believe a deduction is wrong, escalate through the insurer's grievance channel and, if unresolved, to the Insurance Ombudsman.

What font and format rules did the circular impose on these forms?

The circular directs that the forms be clear and legible with a font size no smaller than Times New Roman 10, while permitting insurers and TPAs to capture the details in OCR or machine-readable format and to add clauses consistent with their service-level agreements.

Does cashless apply only at network hospitals?

The Part C and Part D cashless framework operates at network hospitals with which your insurer or TPA has an agreement. Treatment at a non-network hospital typically follows the reimbursement route instead, where you pay first and claim later, so the standardised authorisation letter does not apply in the same way.