Maria Theresa Castillo, PA
Medical Physician Assistant · San Antonio, TX
Maria Theresa Castillo, PA is a medical physician assistant with a practice address in San Antonio, Texas, and NPI 1093792616, issued on Dec 23, 2005. Check the license (Texas PA04462, as entered in NPPES) with the Texas board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Maria Theresa Castillo
- Credential
- PA
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- License number
- PA04462 TX
Self-reported in NPPES; status is on the state search - Practice location
- 621 Camden St Ste 202, San Antonio, TX 78215
- Phone
- (210) 253-3426
- Enumerated
- Dec 23, 2005
- Record last updated
- Mar 4, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (210) 477-1808
- Medicare enrollment
- Enrolled (PECOS I20050802001246); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest medical physician assistant records → All 2,146 in Texas → Look up another NPI →
Also registered at 621 Camden St Ste 202
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Bijo John, MDGastroenterology Physician1922260017
- Meher Sindhoora Mavuram, M.D.Gastroenterology Physician1942581913
- Christie Morrison, CRNPAcute Care Nurse Practitioner1760875165
Verify Maria Theresa Castillo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Texas board licenses this profession
Search for license PA04462Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
78% fewer Medicare Part D claims than the average medical physician assistant in 2024
251 Medicare Part D claims for 57 beneficiaries, against an average of 1,148 among the 23,801 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Azathioprine61 claims
- Ursodiol48 claims
- Xifaxan32 claims
- Lactulose26 claims
- Constulose25 claims
- Furosemide18 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: $710.07
23 payments; by number, the most common kind was food and beverage; the largest payer was Ipsen Biopharmaceuticals, Inc. The 16,165 providers of this specialty with any payment received $1,055.00 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
- Texas Liver Consultants PASan Antonio, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Maria Theresa Castillo among 2,146 medical physician assistant records in Texas
Maria Theresa Castillo, PA is one of 2,146 medical physician assistant records with a practice address in Texas. 68% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 94% newer
- In a Medicare fileYes · 68% of these records are
- In the CMS Doctors and Clinicians fileYes · 44% of these records are
- Graduated2004 · median 2012 among the 953 with a school on file
- Record last updated2010 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AM0700X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Physician Assistant providers in Texas
There are 2,146 medical physician assistant records in Texas.
All 2,146 in Texas → Every provider in San Antonio → Medical Physician Assistant nationwide →
The 8 medical physician assistant records with the nearest ZIP codes
- Amanda Betancourt-Cortez, PA-CSan Antonio, TX 782151245689876
- Michael BrownSan Antonio, TX 782151215479241
- Madison Carter, PASan Antonio, TX 782151467169862
- Kip Jennings, MPA-CSan Antonio, TX 782151871629279
- Aaron Villarreal, PA-CSan Antonio, TX 782151730310376
- Glen York, PHYSICIAN ASSISTANTSan Antonio, TX 782151821197518
- Jose Acosta, PASan Antonio, TX 782141720085434
- Larry Ake, PA-CSan Antonio, TX 782161114181369
Common questions
What is Maria Theresa Castillo, PA's NPI number?
Maria Theresa Castillo, PA's National Provider Identifier (NPI) is 1093792616, issued on Dec 23, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Maria Theresa Castillo, PA located?
The NPPES record lists a practice address at 621 Camden St Ste 202, San Antonio, TX, 78215. Phone: (210) 253-3426. Providers update this record themselves, so call before visiting.
How can I verify Maria Theresa Castillo, PA's license?
NPPES lists Texas license number PA04462, as entered by the provider. Search the Texas board that licenses this profession; the NPPES record confirms identity only.
How much does Maria Theresa Castillo, PA prescribe under Medicare Part D?
In 2024, Maria Theresa Castillo, PA had 251 Medicare Part D claims for 57 beneficiaries; the average among medical physician assistant prescribers was 1,148. 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.