Jerry F. Castilleja, M.D.
Family Medicine Physician · Seguin, TX
Jerry F. Castilleja, M.D. is a family medicine physician with a practice address in Seguin, Texas, and NPI 1720126659, issued on Feb 2, 2007. Check the license (Texas H9456, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Jerry F. Castilleja
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- H9456 TX
Self-reported in NPPES; status is on the state search - Practice location
- 1104 Jefferson Ave, Seguin, TX 78155
- Phone
- (830) 379-9797
- Enumerated
- Feb 2, 2007
- Record last updated
- Jun 4, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (855) 504-3083
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 11,119 in Texas → Look up another NPI →
Also registered at 1104 Jefferson Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Angela Davis, APRN, CPNPPediatric Nurse Practitioner1629313424
- Lisa Deboer, FNPNurse Practitioner1144548603
- Elizabeth Diaz, LCSWClinical Social Worker1326517111
- Stefanie Escontrias, LMHCCounselor1447624242
- Tammy Martino, LPCProfessional Counselor1396142113
- Simone MelhuishClinical Social Worker1780929620
Verify Jerry F. Castilleja in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license H9456Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% fewer Medicare Part D claims than the average family medicine physician in 2024
534 Medicare Part D claims for 84 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 34 claims were for opioids.
Most prescribed
- Buprenorphine-Naloxone48 claims
- Gabapentin29 claims
- Alprazolam25 claims
- Donepezil Hcl19 claims
- Hydrocodone-Acetaminophen18 claims
- Duloxetine Hcl17 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.
Jerry F. Castilleja among 11,119 family medicine physician records in Texas
Jerry F. Castilleja, M.D. is one of 11,119 family 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 2007, is newer than 46% of them.
- NPI issued2007 · 46% of these records are older, 45% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileNo · 64% of these records are
- Record last updated2021 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
29 family medicine physician records list a practice address in Seguin
They are 29 of the 427 NPPES records with a practice address in Seguin, and 11,119 family medicine physician records in Texas.
All 11,119 in Texas → Every provider in Seguin → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Susan Boullioun, MDSeguin, TX 781551528148889
- Melanie Carreon, MDSeguin, TX 781551619047156
- Yeung Chan, M.DSeguin, TX 781551679655328
- Antonio Flores, M.D.Seguin, TX 781551508853938
- Gustavo Gross, MDSeguin, TX 781551376582098
- Arlynn Hartfiel, M.D.Seguin, TX 781551063461549
- Jane Pearce, MDSeguin, TX 781551659379337
- Thomas Raetzsch, M.D.Seguin, TX 781551629156765
Common questions
What is Jerry F. Castilleja, M.D.'s NPI number?
Jerry F. Castilleja, M.D.'s National Provider Identifier (NPI) is 1720126659, issued on Feb 2, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Jerry F. Castilleja, M.D. located?
The NPPES record lists a practice address at 1104 Jefferson Ave, Seguin, TX, 78155. Phone: (830) 379-9797. Providers update this record themselves, so call before visiting.
How can I verify Jerry F. Castilleja, M.D.'s license?
NPPES lists Texas license number H9456, 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 Jerry F. Castilleja, M.D. prescribe under Medicare Part D?
In 2024, Jerry F. Castilleja, M.D. had 534 Medicare Part D claims for 84 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.