Juan Ismael Castillo, M.D.
Endocrinology, Diabetes & Metabolism Physician · El Paso, TX
Juan Ismael Castillo, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in El Paso, Texas, and NPI 1295222008, issued on Apr 17, 2018. Check the license (Texas U2452, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Juan Ismael Castillo
- Credential
- M.D.
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- U2452 TX
Self-reported in NPPES; status is on the state search - Practice location
- 9839 Kenworthy St Ste E, El Paso, TX 79924
- Phone
- (915) 790-5700
- Enumerated
- Apr 17, 2018
- Record last updated
- Sep 15, 2024
- Medicare enrollment
- Enrolled (PECOS I20230703002840); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 743 in Texas → Look up another NPI →
Verify Juan Ismael Castillo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license U2452Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
61% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
1,018 Medicare Part D claims for 159 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 65% of claims.
Most prescribed
- Ozempic156 claims
- Lantus Solostar118 claims
- Jardiance104 claims
- Levothyroxine Sodium76 claims
- Metformin Hcl75 claims
- Metformin Hcl Er65 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: $1,062.44
20 payments; by number, the most common kind was food and beverage; the largest payer was Beta Bionics, Inc. The 5,661 providers of this specialty with any payment received $5,742.15 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
- EL Paso County Hospital DistrictEl Paso, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Juan Ismael Castillo among 743 endocrinology, diabetes & metabolism physician records in Texas
Juan Ismael Castillo, M.D. is one of 743 endocrinology, diabetes & metabolism physician records with a practice address in Texas. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 91% of them.
- NPI issued2018 · 91% of these records are older, 7% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 75% of these records are
- Graduated2005 · median 2004 among the 560 with a school on file
- Record last updated2024 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Texas
There are 743 endocrinology, diabetes & metabolism physician records in Texas.
All 743 in Texas → Every provider in El Paso → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Caleb Nieves Velez, MDEl Paso, TX 799251760969851
- Homer Lemar, M.D.El Paso, TX 799201326052846
- Thomas Oliver, MDEl Paso, TX 799201376519983
- Irene Chiucchini, M.D.El Paso, TX 799151508876061
- Benito Marranzini, M.D.El Paso, TX 799351083617328
- Sergio Rovner, M.D.El Paso, TX 799351437164803
- Mariana Yates, MDEl Paso, TX 799121154584449
- Ifeoma Egbuonu, MDEl Paso, TX 799381083010060
Common questions
What is Juan Ismael Castillo, M.D.'s NPI number?
Juan Ismael Castillo, M.D.'s National Provider Identifier (NPI) is 1295222008, issued on Apr 17, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Juan Ismael Castillo, M.D. located?
The NPPES record lists a practice address at 9839 Kenworthy St Ste E, El Paso, TX, 79924. Phone: (915) 790-5700. Providers update this record themselves, so call before visiting.
How can I verify Juan Ismael Castillo, M.D.'s license?
NPPES lists Texas license number U2452, as entered by the provider. 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 Juan Ismael Castillo, M.D. prescribe under Medicare Part D?
In 2024, Juan Ismael Castillo, M.D. had 1,018 Medicare Part D claims for 159 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.