Adrian Casillas, MD
Allergy & Immunology (Internal Medicine) Physician · El Paso, TX
Adrian Casillas, MD is an allergy & immunology (internal medicine) physician with a practice address in El Paso, Texas, and NPI 1871528125, issued on Jul 12, 2006. Check the license on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Adrian Casillas
- Credential
- MD
- Primary taxonomy
- Allergy & Immunology (Internal Medicine) Physician 207RA0201X
- License number
- G63875 CA
Self-reported in NPPES; status is on the state search - Practice location
- 11163 LA Quinta PL Ste A200, El Paso, TX 79936
- Phone
- (915) 320-3854
- Enumerated
- Jul 12, 2006
- Entity
- Type 1 · individual
Also registered at 11163 LA Quinta PL Ste A200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nicole Davis, N.P.Family Nurse Practitioner1477785038
- Cristina Dominguez, ACNPAcute Care Nurse Practitioner1720843824
Verify Adrian Casillas in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical BoardCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
11% fewer Medicare Part D claims than the average allergy & immunology (internal medicine) physician in 2024
740 Medicare Part D claims for 165 beneficiaries, against an average of 835 among the 378 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims.
Most prescribed
- Azelastine Hcl74 claims
- Famotidine67 claims
- Fluticasone Propionate56 claims
- Montelukast Sodium48 claims
- Doxycycline Monohydrate33 claims
- Dupixent Syringe33 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: $641.42
34 payments, mostly food and beverage; the largest payer was Regeneron Healthcare Solutions, Inc.. The 284 providers of this specialty with any payment received $10,235.67 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.
One hospital or facility affiliation
- Bhs Physicians Network, IncEl Paso, TX
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Allergy & Immunology (Internal Medicine) Physician providers in Texas
There are 46 allergy & immunology (internal medicine) physician records in Texas.
Other allergy & immunology (internal medicine) physician records in Texas
- Rigoberto Acosta, M.D.College Station, TX1912024274
- Michael Adame, MDSan Antonio, TX1730742214
- Susan Andrew, MDDickinson, TX1154317576
- Qamar Arfeen, M.D.Beaumont, TX1295738649
- Barbara Baxter, MDDallas, TX1720035637
- Sarah Biggs, MDAmarillo, TX1376079202
- Charles Calais, D.OSan Antonio, TX1831416197
- William Calhoun, MDGalveston, TX1811056567
- Jeffrey Chambliss, MDDallas, TX1265877054
- Nicole Christians, MDLeague City, TX1528594397
Common questions
What is Adrian Casillas, MD's NPI number?
Adrian Casillas, MD's National Provider Identifier (NPI) is 1871528125, issued on Jul 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Adrian Casillas, MD located?
The NPPES record lists a practice address at 11163 LA Quinta PL Ste A200, El Paso, TX, 79936. Phone: (915) 320-3854. Providers update this record themselves, so call before visiting.
How can I verify Adrian Casillas, MD's license?
Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Adrian Casillas, MD prescribe under Medicare Part D?
In 2024, Adrian Casillas, MD had 740 Medicare Part D claims for 165 beneficiaries; the average among allergy & immunology (internal medicine) physician prescribers was 835. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.