Rex Arthur Werner, O.D.
Optometrist · El Cajon, CA
Rex Arthur Werner, O.D. is an optometrist with a practice address in El Cajon, California, and NPI 1891760716, issued on Feb 22, 2006. Check the license (California OPT9378TPL, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Rex Arthur Werner
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License number
- OPT9378TPL CA
Self-reported in NPPES; status is on the state search - Practice location
- 2650 Jamacha RD, El Cajon, CA 92019
- Phone
- (619) 670-6296
- Enumerated
- Feb 22, 2006
- Record last updated
- Aug 4, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (619) 670-8852
- Medicaid ID
- SD0093780 CA
- Medicare enrollment
- Enrolled (PECOS I20040903000544); accepts Medicare assignment
- Medical or professional school
- University Alabama Birmingham - School Of Optometry, 1989
- Entity
- Type 1 · individual
8 nearest optometrist records → All 8,308 in California → Look up another NPI →
Also registered at 2650 Jamacha RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rex Werner, O.D.Optometrist1821259458
Verify Rex Arthur Werner in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license OPT9378TPLCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
32% fewer Medicare Part D claims than the average optometrist in 2024
187 Medicare Part D claims for 53 beneficiaries, 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.
Most prescribed
- Latanoprost81 claims
- Lumigan22 claims
- Dorzolamide-Timolol13 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.
Industry payments in 2024: $468.48
7 payments; by number, the most common kind was food and beverage; the largest payer was Alcon Vision LLC. The 34,453 providers of this specialty with any payment received $769.99 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Rex Aaron Werner OD, IncEl Cajon, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Rex Arthur Werner among 8,308 optometrist records in California
Rex Arthur Werner, 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 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 66% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 43% of these records are
- Graduated1989 · median 2008 among the 3,573 with a school on file
- Record last updated2010 · 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.
All 8,308 in California → Every provider in El Cajon → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Andrea Meagher, ODEl Cajon, CA 920191689390833
- Sarah Moghadam, O.D.El Cajon, CA 920191699105932
- Megan Stephan, ODEl Cajon, CA 920191720948185
- Queen Thach, O.D.El Cajon, CA 920191053841478
- Rex Werner, O.D.El Cajon, CA 920191821259458
- Alla Young, ODEl Cajon, CA 920191285085142
- Richard Carlson, O.D.El Cajon, CA 920201619989787
- Marilyn Carter, ODEl Cajon, CA 920201003884776
Common questions
What is Rex Arthur Werner, O.D.'s NPI number?
Rex Arthur Werner, O.D.'s National Provider Identifier (NPI) is 1891760716, issued on Feb 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Rex Arthur Werner, O.D. located?
The NPPES record lists a practice address at 2650 Jamacha RD, El Cajon, CA, 92019. Phone: (619) 670-6296. Providers update this record themselves, so call before visiting.
How can I verify Rex Arthur Werner, O.D.'s license?
NPPES lists California license number OPT9378TPL, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Rex Arthur Werner, O.D. prescribe under Medicare Part D?
In 2024, Rex Arthur Werner, O.D. had 187 Medicare Part D claims for 53 beneficiaries; 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.