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Helen Ahn, OD
NPI 1871015719 · Optometrist · San Leandro, CA
Helen Ahn, OD is a Optometrist provider in San Leandro, CA (NPI 1871015719).
Provider details
- NPI number
- 1871015719
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- OD
- Sex
- Female
- Sole proprietor
- No
- License
- 33769TLG (CA)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
Established profile(70/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
8 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
276 Dolores Ave
San Leandro, CA 94577-5008
Phone: (510) 614-1515
Fax: (510) 357-6330
Street-level locationGet directions
Mailing address
904 Cedar St
Santa Cruz, CA 95060-3802
Registry dates
- Enumerated
- 2017-07-12
- Last updated
- 2020-08-31
- Certified
- 2020-07-29
Frequently asked questions
- What is Helen Ahn's NPI number?
- Helen Ahn's National Provider Identifier (NPI) is 1871015719, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Helen Ahn's specialty?
- Helen Ahn is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Helen Ahn located?
- Helen Ahn's practice location on file with NPPES is 276 Dolores Ave, San Leandro, CA 94577-5008.
- What is Helen Ahn's phone number?
- The practice phone number listed in the NPPES registry for Helen Ahn is (510) 614-1515.
- Is Helen Ahn's NPI active?
- Yes — Helen Ahn's NPI (1871015719) is active in the NPPES registry as of the last update on 2020-08-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.