Annessa Du, O.D., a Professional Corporation
NPI 1194430074 · Optometrist · Loma Linda, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Annessa Du, O.D., a Professional Corporation is a Optometrist organization in Loma Linda, CA (NPI 1194430074).
Provider details
- NPI number
- 1194430074
- Entity type
- Organization
- Primary specialty
- OptometristEye and Vision Services Providers
- Organization subpart
- No
- Authorized official
- Annessa Du, Chief Executive Officer(626) 696-6961
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
3 yrs in NPPES 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
- 2023-01-16
- Last updated
- 2023-01-29
- Certified
- 2023-01-29
Frequently asked questions
- What is Annessa Du, O.D., a Professional Corporation's NPI number?
- Annessa Du, O.D., a Professional Corporation's National Provider Identifier (NPI) is 1194430074, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Annessa Du, O.D., a Professional Corporation?
- Annessa Du, O.D., a Professional Corporation is classified in the NPPES registry as Optometrist (Eye and Vision Services Providers).
- Where is Annessa Du, O.D., a Professional Corporation located?
- Annessa Du, O.D., a Professional Corporation's practice location on file with NPPES is 11346 Mountain View Ave Ste B, Loma Linda, CA 92354-3833.
- What is Annessa Du, O.D., a Professional Corporation's phone number?
- The practice phone number listed in the NPPES registry for Annessa Du, O.D., a Professional Corporation is (909) 796-0101.
- Does Annessa Du, O.D., a Professional Corporation accept Medicare?
- Annessa Du, O.D., a Professional Corporation is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Annessa Du, O.D., a Professional Corporation?
- The authorized official listed on Annessa Du, O.D., a Professional Corporation's NPPES record is Annessa Du, Chief Executive Officer. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Annessa Du, O.D., a Professional Corporation's NPI active?
- Yes — Annessa Du, O.D., a Professional Corporation's NPI (1194430074) is active in the NPPES registry as of the last update on 2023-01-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.