# Michael T O Brien

Source: https://ourhealthnetwork.com/doctor/michael-obrien-1821181215
NPI: 1821181215
Data source: CMS NPI Registry (DAC), refreshed monthly

## Quick facts

Michael T O Brien is a family practice based in Castro Valley, CA with NPI 1821181215.

## Profile

- Primary specialty: Family Practice
- Gender: Male
- Medical school: BOSTON UNIVERSITY SCHOOL OF MEDICINE
- Graduation year: 1986
- NPI: 1821181215 ([NPPES record](https://npiregistry.cms.hhs.gov/provider-view/1821181215))

## Practice and contact

- Address: 20100 Lake Chabot Rd, Suite 3, Castro Valley, CA, 945465306
- Phone: (510) 581-7677

## 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:

- [Medicare](https://ourhealthnetwork.com/insurance/medicare) — 1 plan

To verify a specific plan covers Michael T O Brien, use the [OurHealthNetwork Insurance Matcher](https://ourhealthnetwork.com/tools/insurance-matcher?npis=1821181215).

## Industry payments disclosure (CMS Open Payments)

Per CMS Open Payments data (most recent year 2024), this provider has received 1 disclosed payment from medical industry sources totaling approximately $34.

Largest disclosed payer: Amgen Inc. ($34 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 Family Practice doctors in CASTRO VALLEY, CA](https://ourhealthnetwork.com/family-practice/ca/castro-valley)
- [Find insurance plans that cover this doctor](https://ourhealthnetwork.com/tools/insurance-matcher?npis=1821181215)
- [Browse all 5.5M US healthcare providers](https://ourhealthnetwork.com/find-doctors)
- [About our data and methodology](https://ourhealthnetwork.com/methodology)