Gregorio Joel Asuncion Castillo, M.D.
Internal Medicine Physician · El Paso, TX
Gregorio Joel Asuncion Castillo, M.D. is an internal medicine physician with a practice address in El Paso, Texas, and NPI 1184695488, issued on Jan 27, 2006. Check the license (Texas J8950, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Gregorio Joel Asuncion Castillo
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- J8950 TX
Self-reported in NPPES; status is on the state search - Practice location
- 10501 Vista Del Sol Dr, El Paso, TX 79925
- Phone
- (915) 592-8880
- Enumerated
- Jan 27, 2006
- Record last updated
- Nov 7, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (915) 592-8883
- Medicare enrollment
- Enrolled (PECOS I20040917000519); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 9,175 in Texas → Look up another NPI →
Also registered at 10501 Vista Del Sol Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Srinivas Chitti, M.D.,Nephrology Physician1629157607
Verify Gregorio Joel Asuncion Castillo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license J8950Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.7 times the Medicare Part D claims of the average internal medicine physician in 2024
11,901 Medicare Part D claims for 659 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 383 claims were for opioids.
Most prescribed
- Atorvastatin Calcium836 claims
- Losartan Potassium560 claims
- Metformin Hcl536 claims
- Levothyroxine Sodium493 claims
- Amlodipine Besylate450 claims
- Lisinopril387 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: $76.98
2 payments; by number, the most common kind was food and beverage; the largest payer was Inspire Medical Systems, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Gregorio Joel Asuncion Castillo among 9,175 internal medicine physician records in Texas
Gregorio Joel Asuncion Castillo, M.D. is one of 9,175 internal medicine physician records with a practice address in Texas. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 59% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1990 · median 2004 among the 6,088 with a school on file
- Record last updated2011 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
262 internal medicine physician records list a practice address in El Paso
They are 262 of the 11,091 NPPES records with a practice address in El Paso, and 9,175 internal medicine physician records in Texas.
All 9,175 in Texas → Every provider in El Paso → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Blane Alost, MDEl Paso, TX 799251295239515
- Jose Barahona, M.D.El Paso, TX 799251720151509
- Cesar Calianga, M.D.El Paso, TX 799251255301834
- Gabriela Hunko, M.D.El Paso, TX 799251063427433
- Adam Lukasik, MDEl Paso, TX 799251497806202
- Gregory Martin, M.D.El Paso, TX 799251326107657
- Nilesh Mehta, M.D.El Paso, TX 799251225045735
- Salvador Molina, DOEl Paso, TX 799251760446926
Common questions
What is Gregorio Joel Asuncion Castillo, M.D.'s NPI number?
Gregorio Joel Asuncion Castillo, M.D.'s National Provider Identifier (NPI) is 1184695488, issued on Jan 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregorio Joel Asuncion Castillo, M.D. located?
The NPPES record lists a practice address at 10501 Vista Del Sol Dr, El Paso, TX, 79925. Phone: (915) 592-8880. Providers update this record themselves, so call before visiting.
How can I verify Gregorio Joel Asuncion Castillo, M.D.'s license?
NPPES lists Texas license number J8950, 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 Gregorio Joel Asuncion Castillo, M.D. prescribe under Medicare Part D?
In 2024, Gregorio Joel Asuncion Castillo, M.D. had 11,901 Medicare Part D claims for 659 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.