Karen H. Chao, O.D., Inc.
NPI 1639148539 · Optometrist · San Gabriel, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen H. Chao, O.D., Inc. is a Optometrist organization in San Gabriel, CA (NPI 1639148539).
Provider details
- NPI number
- 1639148539
- Entity type
- Organization
- Primary specialty
- OptometristEye and Vision Services Providers
- Organization subpart
- No
- Authorized official
- Karen Chao, President(626) 287-0401
- License
- 10301T (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
20 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
- 2006-03-14
- Last updated
- 2010-09-23
Frequently asked questions
- What is Karen H. Chao, O.D., Inc.'s NPI number?
- Karen H. Chao, O.D., Inc.'s National Provider Identifier (NPI) is 1639148539, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Karen H. Chao, O.D., Inc.?
- Karen H. Chao, O.D., Inc. is classified in the NPPES registry as Optometrist (Eye and Vision Services Providers).
- Where is Karen H. Chao, O.D., Inc. located?
- Karen H. Chao, O.D., Inc.'s practice location on file with NPPES is 121 S Del Mar Ave, San Gabriel, CA 91776-1345.
- What is Karen H. Chao, O.D., Inc.'s phone number?
- The practice phone number listed in the NPPES registry for Karen H. Chao, O.D., Inc. is (626) 287-0401.
- Does Karen H. Chao, O.D., Inc. accept Medicare?
- Karen H. Chao, O.D., Inc. 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 Karen H. Chao, O.D., Inc.?
- The authorized official listed on Karen H. Chao, O.D., Inc.'s NPPES record is Karen Chao, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Karen H. Chao, O.D., Inc.'s NPI active?
- Yes — Karen H. Chao, O.D., Inc.'s NPI (1639148539) is active in the NPPES registry as of the last update on 2010-09-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.