DentalMedicalVision
Nassau Payer ID
Payer ID10539
Payer details
- Payer ID
- 10539
- Other payer IDs
- CRLMS, Z90023
- Coverage types
- Dental, Medical, Vision
- Programs
- Medicare
- Payer website
- 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.
Service Type Code LookupPayer details updated Oct 18, 2026. Payers change IDs and plan names; when in doubt, use the ID on the member's card.
Browse payers A to Z
Verify Coverage in Seconds
Check eligibility and benefits for any service type, track claim status and catch coverage changes across your census, with coverage across 1,800+ payers.