Dr. Alexandra G. Castillejos Ellenthal, MD
- Medicare services, 2024
- 546
- Medicare patients, 2024
- 251
- Part D claims, 2024
- 4,021
- Hospital affiliations
- 2
- Industry payments
- $1,657
- Practice address
- 342 F St, Chula Vista, CA 91910-2625
- Practice phone
- Call (619) 422-1471
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Castillejos Eye Institute Medical Group
Eye care practice · Chula Vista, California
Find Dr. Castillejos Ellenthal's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Alexandra G. Castillejos Ellenthal is an ophthalmologist in Chula Vista, California
Dr. Castillejos Ellenthal practices at Castillejos Eye Institute Medical Group in Chula Vista, California.
Dr. Castillejos Ellenthal's NPI, 1144780933, was assigned on March 20, 2019. Dr. Castillejos Ellenthal holds North Carolina license 2023-00679.
- NPI
- 1144780933NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5496086209
- NPI enumeration date
- March 20, 2019
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (619) 422-1471
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 33
- Medical school graduation
- 2019
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Alexandra G. Castillejos Ellenthal practices at Castillejos Eye Institute Medical Group in Chula Vista, California
Dr. Castillejos Ellenthal's primary practice is Castillejos Eye Institute Medical Group, at 342 F St, Chula Vista, CA 91910-2625. The practice phone is (619) 422-1471.
- Castillejos Eye Institute Medical Group342 F St, Chula Vista, CA 91910-2625Phone(619) 422-1471
Source: Dmand AI Affiliation Data
Dr. Alexandra G. Castillejos Ellenthal is affiliated with 4 sites of care and 3 medical groups
Dr. Castillejos Ellenthal's primary practice is Castillejos Eye Institute Medical Group in Chula Vista, California. Dr. Castillejos Ellenthal is also affiliated with Sharp Chula Vista Medical Center. The medical group on file is Emergency and Acute Care Medical Corporation. Dmand AI also links Dr. Castillejos Ellenthal to 1 more hospital, 2 medical groups and 1 group practice or clinic, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Alexandra G. Castillejos Ellenthal's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Castillejos Ellenthal practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Castillejos Eye Institute Medical Group | Available with a free account |
| +3 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Alexandra G. Castillejos Ellenthal is one of 2,621 ophthalmologists in California
Ophthalmology is Dr. Castillejos Ellenthal's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Castillejos Ellenthal is board certified in ophthalmology by the American Board of Ophthalmology. Dr. Castillejos Ellenthal is licensed in North Carolina.
Specialties and state licenses
- Ophthalmology, North CarolinaPrimary
Ophthalmologists near Dr. Castillejos Ellenthal
Counts of ophthalmologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Alexandra G. Castillejos Ellenthal billed Medicare for 546 services in 2024
CMS data shows 546 Medicare services from Dr. Castillejos Ellenthal across 11 procedure codes in 2024, for 251 Medicare patients. Medicare paid $31,364 for them.
Dr. Castillejos Ellenthal's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 292024: 263807%
- Office and hospital visits
- 2023: 542024: 245354%
- Imaging
- 2023: 02024: 21
- Surgery
- 2023: 02024: 17
Where Dr. Castillejos Ellenthal's Medicare services took place, 2024
- In an office52997%
- In a facility173%
Dr. Castillejos Ellenthal compared with the California median for ophthalmologists, 2024
- Dr. Castillejos Ellenthal
- California median
- Medicare services
- 546vs 1,07949% below
- Medicare patients
- 251vs 42140% below
- Part D claims
- 3,918vs 6186.3 times
Medians across 2,568 ophthalmologists in California with Dmand AI profiles that report each measure.
Dr. Castillejos Ellenthal's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Castillejos Ellenthal and other ophthalmologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Alexandra G. Castillejos Ellenthal treated 251 Medicare patients in 2024, average age 74
CMS counts 251 Medicare patients who saw Dr. Castillejos Ellenthal in 2024. The largest group is 65 to 74, with 101 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 11% are also on Medicaid. Their average risk score is 1.18, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Castillejos Ellenthal's median patient age at 73, with 61% women.
Dr. Castillejos Ellenthal's Medicare patients by age, 2024
Dr. Castillejos Ellenthal's Medicare patients by sex, 2024
- Women15963%
- Men9237%
Chronic conditions among Dr. Castillejos Ellenthal's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis48%
- Diabetes35%
- Chronic kidney disease27%
- Anxiety23%
- Ischemic heart disease18%
- Mood disorders18%
Share of Medicare patients with each condition. A patient can have several.
Dr. Castillejos Ellenthal's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women61%
- Men38%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Alexandra G. Castillejos Ellenthal wrote 4,021 Medicare Part D claims in 2024
In 2024, Dr. Castillejos Ellenthal wrote 4,021 Medicare Part D claims for 1,221 patients. 71% of them were for generic drugs. CMS names the drug for 3,918 of them, across 28 drugs with 11 or more claims each, at $310,821 in total drug cost. In 2023, CMS named 1,192 claims across 19 drugs.
Dr. Castillejos Ellenthal's Part D claims by kind of drug, 2024
- Generic2,865 claims71%
- Brand-name1,156 claims29%
Dr. Castillejos Ellenthal's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,1922024: 3,918229%
Drugs named by CMS: 28 in 2024, 19 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Alexandra G. Castillejos Ellenthal ranks in the 47th percentile for cataract surgery in Medicare
Dr. Castillejos Ellenthal accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 23 procedures of cataract surgery by Dr. Castillejos Ellenthal, more than 47% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Castillejos Ellenthal ranks in Medicare procedure volume
- Cataract surgery
- 47th percentile23 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Alexandra G. Castillejos Ellenthal received $1,657 in industry payments from 2023 to 2025
CMS Open Payments shows 29 general payments to Dr. Castillejos Ellenthal from 6 drug and device companies from 2023 to 2025. Food and beverage make up the largest share, 55% of the total. Abbvie Inc. paid the most, $1,076.
General payments to Dr. Castillejos Ellenthal by program year, 2023 to 2025
General payments to Dr. Castillejos Ellenthal by kind, 2023 to 2025
- Food and beverage$90855%
- Travel and lodging$74945%
Companies that paid Dr. Castillejos Ellenthal the most, 2023 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Alexandra G. Castillejos Ellenthal is board certified in ophthalmology
- Board certified in ophthalmology
Source: Dmand AI Professional Profile Data
Sources for Dr. Alexandra G. Castillejos Ellenthal's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Alexandra G. Castillejos Ellenthal
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Alexandra G. Castillejos Ellenthal's NPI number?
Dr. Alexandra G. Castillejos Ellenthal's NPI number is 1144780933. It was assigned on March 20, 2019, and it is active in the NPI Registry.
What kind of doctor is Dr. Alexandra G. Castillejos Ellenthal?
Dr. Alexandra G. Castillejos Ellenthal is an ophthalmologist in Chula Vista, California. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Alexandra G. Castillejos Ellenthal practice?
Dr. Castillejos Ellenthal practices at 342 F St, Chula Vista, CA 91910-2625. Dr. Castillejos Ellenthal's primary practice is Castillejos Eye Institute Medical Group in Chula Vista, California. Dmand AI also links Dr. Castillejos Ellenthal to 1 hospital, 2 medical groups and 1 group practice or clinic.
What is Dr. Alexandra G. Castillejos Ellenthal's office phone number?
The practice phone on file for Dr. Castillejos Ellenthal is (619) 422-1471.
What is Dr. Alexandra G. Castillejos Ellenthal's medical license number?
Dr. Castillejos Ellenthal holds North Carolina license 2023-00679.
Which hospitals is Dr. Alexandra G. Castillejos Ellenthal affiliated with?
Dr. Castillejos Ellenthal is affiliated with Sharp Chula Vista Medical Center. Dmand AI links Dr. Castillejos Ellenthal to 1 more hospital.
What medical group is Dr. Alexandra G. Castillejos Ellenthal part of?
Dr. Castillejos Ellenthal is linked to Emergency and Acute Care Medical Corporation. Dmand AI links Dr. Castillejos Ellenthal to 2 more medical groups.
Does Dr. Alexandra G. Castillejos Ellenthal accept Medicare?
Yes. CMS data shows Dr. Castillejos Ellenthal billed Medicare for 546 services in 2024, and Dr. Castillejos Ellenthal accepts Medicare assignment.
How many Medicare patients does Dr. Alexandra G. Castillejos Ellenthal see?
CMS counts 251 Medicare patients who saw Dr. Castillejos Ellenthal in 2024, with an average age of 74.
Is Dr. Alexandra G. Castillejos Ellenthal board certified?
Yes. Dr. Castillejos Ellenthal is board certified in ophthalmology by the American Board of Ophthalmology.
Show 4 more questionsShow fewer questions
What services does Dr. Alexandra G. Castillejos Ellenthal bill to Medicare?
In 2024, Dr. Castillejos Ellenthal's most billed Medicare services were office visit, established patient (99213), office visit, established patient (99214) and office visit, new patient (99204).
What drugs does Dr. Alexandra G. Castillejos Ellenthal prescribe most?
In 2024 Medicare Part D data, Dr. Castillejos Ellenthal's most prescribed drugs by claims were Latanoprost, Dorzolamide-Timolol and Brimonidine Tartrate.
Has Dr. Alexandra G. Castillejos Ellenthal received payments from drug or device companies?
CMS Open Payments shows $1,657 in general payments to Dr. Castillejos Ellenthal from 6 companies from 2023 to 2025. The largest total came from Abbvie Inc.
How long has Dr. Alexandra G. Castillejos Ellenthal been practicing?
Dr. Castillejos Ellenthal graduated from medical school in 2019, 7 years ago.
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