Dr. Alejandra Casillas, MD
- Medicare services, 2024
- 52
- Medicare patients, 2024
- 26
- Part D claims, 2024
- 529
- Publications
- 11
- Hospital affiliations
- 1
- Practice address
- 2509 Pico Blvd, Santa Monica, CA 90405
- Practice phone
- Call (310) 664-7920
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Simms/Mann Health and Wellness Center
FQHC - Main Site · Santa Monica, California
Find Dr. Casillas' 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. Alejandra Casillas is an internist in Santa Monica, California
Dr. Casillas practices at Simms/Mann Health and Wellness Center in Santa Monica, California.
Dr. Casillas' NPI, 1205026721, was assigned on July 31, 2007. Dr. Casillas graduated from Harvard Medical School in 2005. Dr. Casillas holds California license A98719.
- NPI
- 1205026721NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0345319182
- NPI enumeration date
- July 31, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (310) 664-7920
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 47
- Medical school graduation
- 2005
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Alejandra Casillas practices at Simms/Mann Health and Wellness Center in Santa Monica, California
Dr. Casillas' primary practice is Simms/Mann Health and Wellness Center, at 2509 Pico Blvd, Santa Monica, CA 90405 in Los Angeles County. The practice phone is (310) 664-7920.
- Simms/Mann Health and Wellness Center2509 Pico Blvd, Santa Monica, CA 90405 · Los Angeles CountyPhone(310) 664-7920
Source: Dmand AI Affiliation Data
Dr. Alejandra Casillas is affiliated with 3 sites of care and 2 medical groups
Dr. Casillas' primary practice is Simms/Mann Health and Wellness Center in Santa Monica, California. Dr. Casillas is also affiliated with Ronald Reagan UCLA Medical Center. The medical group on file is Venice Family Clinic. Dmand AI also links Dr. Casillas to 1 more group practice or clinic and 1 medical group, each named with a free account. Dr. Casillas' employer is on file too: a community health center (fqhc).
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Alejandra Casillas' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Casillas practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Simms/Mann Health and Wellness Center | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Alejandra Casillas is one of 16,751 internists in California
Internal medicine is Dr. Casillas' primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Casillas is board certified in internal medicine by the American Board of Internal Medicine. Dr. Casillas is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists adjustment disease, chronic diabetes, chronic hypertension, contact dermatitis, hand joint or tendon inflammation, joint pain, lower back pain and obesity among the conditions Dr. Casillas treats.
Internists near Dr. Casillas
Counts of internists 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. Alejandra Casillas billed Medicare for 52 services in 2024
CMS data shows 52 Medicare services from Dr. Casillas across 1 procedure code in 2024, all of them office visits, for 26 Medicare patients. Medicare paid $2,447 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Casillas' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 362024: 5244%
Dr. Casillas compared with the California median for internists, 2024
- Dr. Casillas
- California median
- Medicare services
- 52vs 36186% below
- Medicare patients
- 26vs 15183% below
- Part D claims
- 277vs 42134% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Casillas' 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.
Need commercial claims for Dr. Casillas?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Casillas and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Alejandra Casillas treated 26 Medicare patients in 2024, average age 74
CMS counts 26 Medicare patients who saw Dr. Casillas in 2024. The largest group is 75 to 84, with 15 patients. 75% of them have high cholesterol, and 69% have arthritis. 54% are also on Medicaid. Their average risk score is 1.30, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Casillas' median patient age at 57, with 65% women.
Dr. Casillas' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Dr. Casillas' Medicare patients, 2024
- High cholesterol75%
- Arthritis69%
- High blood pressure69%
Share of Medicare patients with each condition. A patient can have several.
Dr. Casillas' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 57
Patient panel by sex, all payers
- Women65%
- Men35%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Alejandra Casillas wrote 529 Medicare Part D claims in 2024
In 2024, Dr. Casillas wrote 529 Medicare Part D claims for 48 patients. 88% of them were for generic drugs. CMS names the drug for 277 of them, across 16 drugs with 11 or more claims each, at $2,535 in total drug cost. In 2023, CMS named 244 claims across 15 drugs.
Dr. Casillas' Part D claims by kind of drug, 2024
- Generic466 claims88%
- Brand-name and other63 claims12%
Dr. Casillas' 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: 2442024: 27714%
Drugs named by CMS: 16 in 2024, 15 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
How Dr. Alejandra Casillas takes part in Medicare
Dr. Casillas accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Alejandra Casillas has 11 publications on record
Dmand AI links 11 papers to Dr. Casillas in 2018. Dr. Casillas' most frequent co-authors are Leo Sergio Morales, MD, Gerardo Moreno, MD and Michael K. Ong, MD.
Dr. Casillas' most frequent co-authors
- Leo Sergio Morales, MD1 shared paper
- Gerardo Moreno, MD1 shared paper
- Michael K. Ong, MD1 shared paper
Recent publications by Dr. Casillas
See who Dr. Casillas researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Casillas works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Alejandra Casillas received $19 in industry payments in 2021
CMS Open Payments shows 1 general payment to Dr. Casillas from 1 drug or device company in 2021. Food and beverage make up the largest share, 100% of the total. Alkermes, Inc. paid the most, $19.
Companies that paid Dr. Casillas the most, 2021 to 2021
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Alejandra Casillas graduated from Harvard Medical School
Dr. Casillas graduated from Harvard Medical School in 2005.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Alejandra Casillas accepts plans from 12 insurance carriers
Dr. Casillas is in network with 12 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Elevance
- Regence Health Plans
- Alliant Health Plans
- +4 more carriersWith a free account
Plan types Dr. Casillas accepts, by number of carriers
- Medicare7
- PPO7
- HMO6
- POS4
- EPO3
Source: Dmand AI Insurance Network Data
Sources for Dr. Alejandra Casillas'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 DataDmand AI Org Hierarchy 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Alejandra Casillas
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. Alejandra Casillas' NPI number?
Dr. Alejandra Casillas' NPI number is 1205026721. It was assigned on July 31, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Alejandra Casillas?
Dr. Alejandra Casillas is an internist in Santa Monica, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Alejandra Casillas practice?
Dr. Casillas practices at 2509 Pico Blvd, Santa Monica, CA 90405. Dr. Casillas' primary practice is Simms/Mann Health and Wellness Center in Santa Monica, California. Dmand AI also links Dr. Casillas to 1 group practice or clinic and 1 medical group.
What is Dr. Alejandra Casillas' office phone number?
The practice phone on file for Dr. Casillas is (310) 664-7920.
What is Dr. Alejandra Casillas' medical license number?
Dr. Casillas holds California license A98719.
Which hospitals is Dr. Alejandra Casillas affiliated with?
Dr. Casillas is affiliated with Ronald Reagan UCLA Medical Center.
What medical group is Dr. Alejandra Casillas part of?
Dr. Casillas is linked to Venice Family Clinic. Dmand AI links Dr. Casillas to 1 more medical group.
Does Dr. Alejandra Casillas accept Medicare?
Yes. CMS data shows Dr. Casillas billed Medicare for 52 services in 2024, and Dr. Casillas accepts Medicare assignment.
How many Medicare patients does Dr. Alejandra Casillas see?
CMS counts 26 Medicare patients who saw Dr. Casillas in 2024, with an average age of 74.
Is Dr. Alejandra Casillas board certified?
Yes. Dr. Casillas is board certified in internal medicine by the American Board of Internal Medicine.
Show 8 more questionsShow fewer questions
What services does Dr. Alejandra Casillas bill to Medicare?
In 2024, Dr. Casillas' most billed Medicare services were office visit, established patient (99213).
Where did Dr. Alejandra Casillas go to medical school?
Dr. Casillas graduated from Harvard Medical School in 2005.
What drugs does Dr. Alejandra Casillas prescribe most?
In 2024 Medicare Part D data, Dr. Casillas' most prescribed drugs by claims were Atorvastatin Calcium, Levothyroxine Sodium and Simvastatin.
Has Dr. Alejandra Casillas received payments from drug or device companies?
CMS Open Payments shows $19 in general payments to Dr. Casillas from 1 company from 2021 to 2021. The largest total came from Alkermes, Inc.
How long has Dr. Alejandra Casillas been practicing?
Dr. Casillas graduated from medical school in 2005, 21 years ago.
Does Dr. Alejandra Casillas do research?
Dmand AI links 11 publications to Dr. Casillas.
Who does Dr. Alejandra Casillas publish with?
Dr. Casillas' most frequent co-authors are Leo Sergio Morales, MD (1 shared paper), Gerardo Moreno, MD (1 shared paper) and Michael K. Ong, MD (1 shared paper).
What insurance does Dr. Alejandra Casillas accept?
Dr. Casillas is in network with 12 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
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