Robert Spencer Christensen, O.D.
Optometrist · Mill Valley, CA
Robert Spencer Christensen, O.D. is an optometrist with a practice address in Mill Valley, California, and NPI 1639246689, issued on Nov 28, 2006. Check the license (California 6009T, as entered in NPPES) with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Robert Spencer Christensen
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 6009T CA
Self-reported in NPPES; status is on the state search - Practice location
- 741 E Blithedale Ave, Mill Valley, CA 94941
- Phone
- (415) 381-3355
- Enumerated
- Nov 28, 2006
- Record last updated
- Mar 7, 2023
- Fax
- (415) 381-9579
- Entity
- Type 1 · individual
8 nearest optometrist records → All 8,308 in California → Look up another NPI →
Verify Robert Spencer Christensen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 6009TCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Robert Spencer Christensen among 8,308 optometrist records in California
Robert Spencer Christensen, O.D. is one of 8,308 optometrist records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 66% newer
- In a Medicare fileNo · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 43% of these records are
- Record last updated2023 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 152W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Optometrist providers in California
There are 8,308 optometrist records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 8,308 in California → Every provider in Mill Valley → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Channie Duhn, O.D.Mill Valley, CA 949411487646931
- Lawrence KaplanMill Valley, CA 949411497765028
- Nina Margolis, O.D.Mill Valley, CA 949411861520793
- Eloisa Morfin, ODMill Valley, CA 949411003657545
- Edward Haack, O.D.Larkspur, CA 949391174516462
- Susan Bynum, O.D.Novato, CA 949451861539868
- Christina Chun, O.D.Novato, CA 949451386037992
- Suzanne Huang, O.D.Novato, CA 949451215936174
Common questions
What is Robert Spencer Christensen, O.D.'s NPI number?
Robert Spencer Christensen, O.D.'s National Provider Identifier (NPI) is 1639246689, issued on Nov 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert Spencer Christensen, O.D. located?
The NPPES record lists a practice address at 741 E Blithedale Ave, Mill Valley, CA, 94941. Phone: (415) 381-3355. Providers update this record themselves, so call before visiting.
How can I verify Robert Spencer Christensen, O.D.'s license?
NPPES lists California license number 6009T, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.