OrganizationActive
Jean S. Brennan O.D., a Professional Corp.
NPI 1649789413 · Optometrist · Mill Valley, CA
Jean S. Brennan O.D., a Professional Corp. is a Optometrist organization in Mill Valley, CA (NPI 1649789413).
Provider details
- NPI number
- 1649789413
- Entity type
- Organization
- Primary specialty
- OptometristEye and Vision Services Providers
- Organization subpart
- No
- Authorized official
- Jean Brennan, President(415) 388-8262
- License
- 10610T (CA)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
Established profile(69/100 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
158 Throckmorton Ave
Mill Valley, CA 94941-1919
Phone: (415) 388-8262
Fax: (415) 388-2234
Street-level locationGet directions
Mailing address
158 Throckmorton Ave
Mill Valley, CA 94941-1919
Registry dates
- Enumerated
- 2017-09-25
- Last updated
- 2022-07-21
Frequently asked questions
- What is Jean S. Brennan O.D., a Professional Corp.'s NPI number?
- Jean S. Brennan O.D., a Professional Corp.'s National Provider Identifier (NPI) is 1649789413, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Jean S. Brennan O.D., a Professional Corp.?
- Jean S. Brennan O.D., a Professional Corp. is classified in the NPPES registry as Optometrist (Eye and Vision Services Providers).
- Where is Jean S. Brennan O.D., a Professional Corp. located?
- Jean S. Brennan O.D., a Professional Corp.'s practice location on file with NPPES is 158 Throckmorton Ave, Mill Valley, CA 94941-1919.
- What is Jean S. Brennan O.D., a Professional Corp.'s phone number?
- The practice phone number listed in the NPPES registry for Jean S. Brennan O.D., a Professional Corp. is (415) 388-8262.
- Who is the authorized official for Jean S. Brennan O.D., a Professional Corp.?
- The authorized official listed on Jean S. Brennan O.D., a Professional Corp.'s NPPES record is Jean Brennan, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Jean S. Brennan O.D., a Professional Corp.'s NPI active?
- Yes — Jean S. Brennan O.D., a Professional Corp.'s NPI (1649789413) is active in the NPPES registry as of the last update on 2022-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.