Karen Nguyen
NPI 1598657041 · Optometrist · Berkeley, CA
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Nguyen is a Optometrist provider in Berkeley, CA (NPI 1598657041).
Provider details
- NPI number
- 1598657041
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Sex
- Female
- Sole proprietor
- Yes
- License
- 36079 (CA)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
Under 1 yr in registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2025-07-18
- Last updated
- 2025-07-18
- Certified
- 2025-07-18
Frequently asked questions
- What is Karen Nguyen's NPI number?
- Karen Nguyen's National Provider Identifier (NPI) is 1598657041, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Nguyen's specialty?
- Karen Nguyen is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Karen Nguyen located?
- Karen Nguyen's practice location on file with NPPES is 200 Minor Hall, Berkeley, CA 94720-0001.
- What is Karen Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Karen Nguyen is (510) 642-2020.
- Does Karen Nguyen accept Medicare?
- Karen Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Nguyen's NPI active?
- Yes — Karen Nguyen's NPI (1598657041) is active in the NPPES registry as of the last update on 2025-07-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.