Michael Duong Od INC in San Ramon, CA
This location of Michael Duong Od bills under NPI 1326906421, an organization record issued on Jan 15, 2026 with the primary taxonomy Optometrist. It is one of 2 NPIs registered under this name and one of 2 in San Ramon; each clinician who sees you there has their own NPI and license.
- Legal name
- Michael Duong Od INC
- Entity
- Type 2 · organization
- Primary taxonomy
- Optometrist 152W00000X
- Practice location
- 2551 SAN RAMON VALLEY BLVD STE 101, San Ramon, CA 94583
- Phone
- 925-743-1222
- Enumerated
- Jan 15, 2026
- Record updated
- Mar 19, 2026
- Authorized official
- Owner (title as filed)
The other San Ramon NPI
- Michael Duong, Od2551 SAN RAMON VALLEY BLVD STE 101 · issued Jul 3, 20171316468176
2 clinicians CMS lists with Michael Duong Od in San Ramon
- Michael Duong, ODOptometrist1831329143
- Richard Lang, ODOptometrist1699347096
Source: CMS Doctors and Clinicians group affiliations, matched by practice name and city.
Checking an organization
- Confirm the business with the California secretary of state.
- Check the HHS-OIG exclusion list for the organization.
- Verify each clinician on their own record and the state license search.
Common questions
Is an organization NPI a license?
No. An NPI identifies who bills. Facilities and the clinicians who work there are licensed separately by the state.
Which San Ramon NPI should I use?
Ask the office which NPI it bills under; all 2 San Ramon NPIs are registered under the same name.
Source: CMS National Plan and Provider Enumeration System (NPPES), monthly file of Aug 9, 2026 (NPPES files on CMS.gov). An NPI identifies who bills; it is not a license.