# Nassau Payer ID

- **Payer ID:** 10539
- **Other payer IDs:** CRLMS, Z90023
- **Coverage types:** Dental, Medical, Vision
- **Programs:** Medicare
- **Payer website:** https://nfg.com

## Other names

- Central Reserve Life Insurance Company (Medicare Supplement)
- Great American
- Nassau Financial Group
- Nassau Life Insurance Company of Kansas

## What You Can Check With Nassau

- Eligibility and benefits for any service type Nassau returns
- Instant results, 24/7, with no phone calls or portals
- Claim status after you bill

What a check returns is up to the payer: some return more detail than others.

Payer details updated Oct 18, 2026. Payers change IDs and plan names; when in doubt, use the ID on the member's card.

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Canonical: https://www.verifytx.com/payers/nassau/