# Corey S Maas, M.D

Source: https://ourhealthnetwork.com/doctor/corey-maas-md-1851469282
NPI: 1851469282
Data source: CMS NPI Registry (NPPES), refreshed monthly

## Quick facts

Corey S Maas, M.D is a general surgery based in San Francisco, CA with NPI 1851469282.

## Profile

- Primary specialty: General Surgery
- Credential: M.D
- Gender: Male
- NPI: 1851469282 ([NPPES record](https://npiregistry.cms.hhs.gov/provider-view/1851469282))

## Practice and contact

- Address: 2400 Clay St, San Francisco, CA, 941151809
- Phone: (415) 567-7000

## Insurance accepted (1 networks)

This provider is in network with the following insurance carriers, based on federal Transparency in Coverage filings and FHIR provider directories:

- [Aetna](https://ourhealthnetwork.com/insurance/aetna) — 8 plans

To verify a specific plan covers Corey S Maas, use the [OurHealthNetwork Insurance Matcher](https://ourhealthnetwork.com/tools/insurance-matcher?npis=1851469282).

## Industry payments disclosure (CMS Open Payments)

Per CMS Open Payments data (most recent year 2024), this provider has received 25 disclosed payments from medical industry sources totaling approximately $24,250.

Largest disclosed payer: ABBVIE INC. ($24,005 cumulative).

Source: CMS Open Payments program (federal financial-transparency dataset). Industry payment disclosures do not imply any wrongdoing; many are legitimate consulting fees, research support, or speaker honoraria.

## Related on OurHealthNetwork

- [More General Surgery doctors in SAN FRANCISCO, CA](https://ourhealthnetwork.com/general-surgery/ca/san-francisco)
- [Find insurance plans that cover this doctor](https://ourhealthnetwork.com/tools/insurance-matcher?npis=1851469282)
- [Browse all 5.5M US healthcare providers](https://ourhealthnetwork.com/find-doctors)
- [About our data and methodology](https://ourhealthnetwork.com/methodology)