# Health Plan of San Mateo Payer ID

- **Payer ID:** HPSM1
- **Other payer IDs:** 12X74, 4292, 5678, 10362, HPOSM, HPSM1MA, SX174
- **Coverage types:** Dental, Medical
- **Programs:** Medicare, Medicaid
- **Where it operates:** California
- **Payer website:** https://www.hpsm.org

## Other names

- Care Advantage
- HPSM

## What You Can Check With Health Plan of San Mateo

- Eligibility and benefits for any service type Health Plan of San Mateo returns
- Instant results, 24/7, with no phone calls or portals

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/health-plan-of-san-mateo/