Alexandra G. Castillejos Ellenthal, MD
Ophthalmology Physician · Chula Vista, CA
Alexandra G. Castillejos Ellenthal, MD is an ophthalmology physician with a practice address in Chula Vista, California, and NPI 1144780933, issued on Mar 20, 2019. Check the license (California A201789, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Alexandra G. Castillejos Ellenthal
- Credential
- MD
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- A201789 CA
Self-reported in NPPES; status is on the state search - Practice location
- 342 F St, Chula Vista, CA 91910
- Phone
- (619) 422-1471
- Enumerated
- Mar 20, 2019
- Record last updated
- Feb 19, 2026
- Medicare enrollment
- Enrolled (PECOS I20230920004117); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 2,899 in California → Look up another NPI →
Also registered at 342 F St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ketan Bakriwala, O.D.Optometrist1528355872
- Duane Bryant, MDOphthalmology Physician1023117124
- David Castillejos, M.D.Ophthalmology Physician1558446401
- Maria Castillejos, M.D.Ophthalmology Physician1043395098
- David Ierston-BrownOptometrist1043105315
- Kim Kelly, ODOptometrist1629963459
Verify Alexandra G. Castillejos Ellenthal in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A201789Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.6 times the Medicare Part D claims of the average ophthalmology physician in 2024
4,021 Medicare Part D claims for 1,221 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 29% of claims.
Most prescribed
- Latanoprost1,109 claims
- Dorzolamide-Timolol642 claims
- Brimonidine Tartrate462 claims
- Prednisolone Acetate311 claims
- Timolol Maleate304 claims
- Dorzolamide Hcl161 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: $371.81
10 payments; by number, the most common kind was food and beverage; the largest payer was Alcon Vision LLC. The 13,221 providers of this specialty with any payment received $4,535.02 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 2 group practices
- Cape Fear Eye Associates PAFayetteville, NC
- Castillejos Eye Institute Medical GroupChula Vista, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alexandra G. Castillejos Ellenthal among 2,899 ophthalmology physician records in California
Alexandra G. Castillejos Ellenthal, MD is one of 2,899 ophthalmology physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 92% of them.
- NPI issued2019 · 92% of these records are older, 6% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2019 · median 2001 among the 1,907 with a school on file
- Record last updated2026 · 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 207W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in California
There are 2,899 ophthalmology physician records in California.
All 2,899 in California → Every provider in Chula Vista → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Duane Bryant, MDChula Vista, CA 919101023117124
- Maria Castillejos, M.D.Chula Vista, CA 919101043395098
- David Castillejos, M.D.Chula Vista, CA 919101558446401
- Gayle Howard, M.D.Chula Vista, CA 919101306872411
- Gary Jacobs, MDChula Vista, CA 919101992772552
- Jessica Maslin, M.D.Chula Vista, CA 919101154684553
- Robert Penner, MDChula Vista, CA 919101982671541
- Sona Shah, MDChula Vista, CA 919101750943403
Common questions
What is Alexandra G. Castillejos Ellenthal, MD's NPI number?
Alexandra G. Castillejos Ellenthal, MD's National Provider Identifier (NPI) is 1144780933, issued on Mar 20, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Alexandra G. Castillejos Ellenthal, MD located?
The NPPES record lists a practice address at 342 F St, Chula Vista, CA, 91910. Phone: (619) 422-1471. Providers update this record themselves, so call before visiting.
How can I verify Alexandra G. Castillejos Ellenthal, MD's license?
NPPES lists California license number A201789, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Alexandra G. Castillejos Ellenthal, MD prescribe under Medicare Part D?
In 2024, Alexandra G. Castillejos Ellenthal, MD had 4,021 Medicare Part D claims for 1,221 beneficiaries; the average among ophthalmology physician prescribers was 1,518. 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.