Trennda Rittenbach, O.D.
Optometrist · Sunnyvale, CA
Trennda Rittenbach, O.D. is an optometrist with a practice address in Sunnyvale, California, and NPI 1427207497, issued on Sep 15, 2008. Check the license (California OPT15049, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Trennda Rittenbach
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License numbers
- OPT15049 CA
3156 MN
Self-reported in NPPES; status is on the state search - Practice location
- 323 N Mathilda Ave, Sunnyvale, CA 94085
- Phone
- (408) 524-5900
- Enumerated
- Sep 15, 2008
- Record last updated
- Apr 13, 2015 (not updated in 11 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest optometrist records → All 8,308 in California → Look up another NPI →
Also registered at 323 N Mathilda Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jill Ackerman, MDOphthalmology Physician1760585228
- Jerry Lai, M.D.Ophthalmology Physician1720205917
- Karen Shih, M.D.Ophthalmology Physician1750565982
- Carol Winton, MDOphthalmology Physician1891877106
Verify Trennda Rittenbach in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license OPT15049Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average optometrist in 2024
18 Medicare Part D claims, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 67% of claims.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Trennda Rittenbach among 8,308 optometrist records in California
Trennda Rittenbach, 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. Its NPI, issued in 2008, is newer than 54% of them.
- NPI issued2008 · 54% of these records are older, 43% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 43% of these records are
- Record last updated2015 · 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).
43 optometrist records list a practice address in Sunnyvale
They are 43 of the 1,690 NPPES records with a practice address in Sunnyvale, and 8,308 optometrist records in California.
All 8,308 in California → Every provider in Sunnyvale → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Michael Fain, O.D.Sunnyvale, CA 940851508931601
- Rita Fong, ODSunnyvale, CA 940851912072042
- Julie Hwang, O.D.Sunnyvale, CA 940851457544488
- Nicole Janovitch, O.D.Sunnyvale, CA 940851720133036
- Karin Meng, O.D.Sunnyvale, CA 940851730234048
- Cory Preston, ODSunnvyale, CA 940851679533681
- Sangita Shah, O.D.Sunnyvale, CA 940851649346701
- Nicholas Froumis, O.D.Sunnyvale, CA 940861407911282
Common questions
What is Trennda Rittenbach, O.D.'s NPI number?
Trennda Rittenbach, O.D.'s National Provider Identifier (NPI) is 1427207497, issued on Sep 15, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Trennda Rittenbach, O.D. located?
The NPPES record lists a practice address at 323 N Mathilda Ave, Sunnyvale, CA, 94085. Phone: (408) 524-5900. Providers update this record themselves, so call before visiting.
How can I verify Trennda Rittenbach, O.D.'s license?
NPPES lists California license number OPT15049, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Trennda Rittenbach, O.D. prescribe under Medicare Part D?
In 2024, Trennda Rittenbach, O.D. had 18 Medicare Part D claims; the average among optometrist prescribers was 277. Part D covers Medicare prescriptions 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.