Samuel Alexander Mainieri, OD
Optometrist · Berkeley, CA
Samuel Alexander Mainieri, OD is an optometrist with a practice address in Berkeley, California, and NPI 1841975943, issued on Jun 16, 2023. Check the license (California OPT35518-TLG, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Samuel Alexander Mainieri
- Credential
- OD
- Primary taxonomy
- Optometrist 152W00000X
- License number
- OPT35518-TLG CA
Self-reported in NPPES; status is on the state search - Practice location
- 200 Minor LN, Berkeley, CA 94720
- Phone
- (510) 642-2020
- Enumerated
- Jun 16, 2023
- Record last updated
- Jun 16, 2023
- Medicare enrollment
- Enrolled (PECOS I20230901003168); accepts Medicare assignment
- Medical or professional school
- University Of California - School Of Optometry, 2023
- Entity
- Type 1 · individual
8 nearest optometrist records → All 8,308 in California → Look up another NPI →
Also registered at 200 Minor LN
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Richard Phan, ODOptometrist1609352798
- Alexa Westerbeck, ODOptometrist1912484445
Verify Samuel Alexander Mainieri in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license OPT35518-TLGCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Regents OF The University OF California AT BerkeleyBerkeley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Samuel Alexander Mainieri among 8,308 optometrist records in California
Samuel Alexander Mainieri, OD 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. Its NPI, issued in 2023, is newer than 92% of them.
- NPI issued2023 · 92% of these records are older, 6% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 43% of these records are
- Graduated2023 · median 2008 among the 3,573 with a school on file
- 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).
126 optometrist records list a practice address in Berkeley
They are 126 of the 4,898 NPPES records with a practice address in Berkeley, and 8,308 optometrist records in California.
All 8,308 in California → Every provider in Berkeley → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Dennis Burger, O.D.Berkeley, CA 947201942357181
- Gunilla Haegerstrom-Portnoy, OD, PHDBerkeley, CA 947201053458745
- Kathryn Johnson, O.D.Berkeley, CA 947201578630141
- Billie Knight, O.D.Berkeley, CA 947201538222096
- Anne Moy, O.D.Berkeley, CA 947201184788713
- Edward Revelli, O.D.Berkeley, CA 947201144367830
- Nina Tran, O.D.Berkeley, CA 947201629082318
- Kathy Tran, O.D.Berkeley, CA 947201346355401
Common questions
What is Samuel Alexander Mainieri, OD's NPI number?
Samuel Alexander Mainieri, OD's National Provider Identifier (NPI) is 1841975943, issued on Jun 16, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Samuel Alexander Mainieri, OD located?
The NPPES record lists a practice address at 200 Minor LN, Berkeley, CA, 94720. Phone: (510) 642-2020. Providers update this record themselves, so call before visiting.
How can I verify Samuel Alexander Mainieri, OD's license?
NPPES lists California license number OPT35518-TLG, 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. Medicare files from data.cms.gov. 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.