My California health insurer says it never got my claim, and I paid cash. How do I file the claim myself?

Health insuranceHow to fileCaliforniaChecked Nov 6, 2026

From K.Actuary, founded by Sangmin Kwon, ASA · sources checked 2026-11-06 · Source: FindLaw · California Insurance Code · § 10350.5 (Notice of Claim) View original ↗

In short

Send written notice of your claim within 20 days of the loss [1].
No claim form within 15 days? Send your own written proof instead [2].
Written proof of loss is due within 90 days, or up to one year if you truly couldn't [3].

What this means

If you paid cash, or the office won't bill your insurer, you can file the claim yourself. Give the insurer written notice of your claim within 20 days after the loss begins, or as soon after that as you reasonably can [1]. That notice starts the clock on the forms.

Once the insurer has your notice, it must send you the forms it uses for proof of loss. If those forms don't arrive within 15 days of your notice, you don't have to wait — you can send your own written proof instead, and that counts [2]. Either way, written proof of loss is due within 90 days after the loss [3]. If it truly wasn't possible to send it that fast, the deadline stretches to as soon as reasonably possible, and no later than one year after the usual due date [3].

These sections don't say exactly what belongs in that proof — "Don't know yet" here.

Your next step

Send the insurer a short written notice today if day 20 is near [1]. Ask for its proof-of-loss form in the same letter, and note you'll send your own written proof if it doesn't arrive within 15 days [2]. Send your proof of loss within 90 days of the loss [3].

Check it yourself

Open your policy and find the sections on notice of claim and proof of loss, then compare the dates there with the ones above [1][3]. What your own plan wants in the packet: "Don't know yet" here.

Where this comes from (3)

[1] FindLaw · California Insurance Code · § 10350.5 (Notice of Claim) · checked 2026-11-06
Written notice of claim must be given to the insurer within 20 days after the occurrence or commencement of any loss covered by the policy, or as soon thereafter as is reasonably possible.
[2] FindLaw · California Insurance Code · § 10350.6 (Claim Forms) · checked 2026-11-06
Claim Forms: The insurer, upon receipt of a notice of claim, will furnish to the claimant such forms as are usually furnished by it for filing proofs of loss. If such forms are not furnished within 15 days after the giving of such notice the claimant shall be deemed to have complied with the requirements of this policy as to proof of loss upon submitting, within the time fixed in the policy for filing proofs of loss,…
[3] FindLaw · California Insurance Code · § 10350.7 (Proofs of Loss) · checked 2026-11-06
Proofs of Loss: Written proof of loss must be furnished to the insurer at its said office in case of claim for loss for which this policy provides any periodic payment contingent upon continuing loss within 90 days after the termination of the period for which the insurer is liable and in case of claim for any other loss within 90 days after the date of such loss. Failure to furnish such proof within the time require…

How we found this

We matched your question to 3 official sources, quoted the exact lines, and re-checked each quote against its source on 2026-11-06.

What we don’t know yet

Your own plan or notice may say something different. If your letter cites another rule, send it and we will look again.

Every answer is checked against the official rule it quotes.

Information only — not legal advice. Your plan, insurer or agency decides.

This answer quotes the official sources listed above, with the date we checked them. Your own policy, notice and state rules control. We are not your lawyer or your insurer. We don’t file, argue or negotiate claims for you — you send any letter or form yourself.

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