Guillermo Madero, MD
Internal Medicine Physician · San Antonio, TX
Guillermo Madero, MD is an internal medicine physician with a practice address in San Antonio, Texas, and NPI 1235384439, issued on Dec 2, 2008. Check the license (Texas Q0968, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Guillermo Madero
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- Q0968 TX
Self-reported in NPPES; status is on the state search - Practice location
- 1499 Hillcrest Dr, San Antonio, TX 78228
- Phone
- (210) 921-3800
- Enumerated
- Dec 2, 2008
- Record last updated
- Apr 8, 2024
- Fax
- (210) 334-2861
- Medicare enrollment
- Enrolled (PECOS I20141024001799); 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 1499 Hillcrest Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Carlos Garcia Monterroso, MDInternal Medicine Physician1114545290
- Laura Pinon Triplett, MDFamily Medicine Physician1518454479
- Tatiana Rugeles Suarez, MDInternal Medicine Physician1447812375
Verify Guillermo Madero in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license Q0968Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.1 times the Medicare Part D claims of the average internal medicine physician in 2024
12,937 Medicare Part D claims for 813 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 294 claims were for opioids.
Most prescribed
- Atorvastatin Calcium939 claims
- Lisinopril573 claims
- Losartan Potassium478 claims
- Metformin Hcl414 claims
- Amlodipine Besylate412 claims
- Gabapentin372 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: $466.46
15 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. 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.
Bills Medicare through one group practice
- Gmg Health Systems Associates PASan Antonio, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Guillermo Madero among 9,175 internal medicine physician records in Texas
Guillermo Madero, MD 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 2008, is newer than 50% of them.
- NPI issued2008 · 50% of these records are older, 46% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2004 · median 2004 among the 6,088 with a school on file
- Record last updated2024 · 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).
657 internal medicine physician records list a practice address in San Antonio
They are 657 of the 37,749 NPPES records with a practice address in San Antonio, and 9,175 internal medicine physician records in Texas.
All 9,175 in Texas → Every provider in San Antonio → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jesus Gallegos, MDSan Antonio, TX 782281851327621
- Carlos Garcia Monterroso, MDSan Antonio, TX 782281114545290
- Thomas Guerra, MDSan Antonio, TX 782281306035241
- Francisca Gushiken, MDSan Antonio, TX 782281801061643
- Carlos Hernandez, MDSan Antonio, TX 782281710984406
- Lawrence Higgins, M.D.San Antonio, TX 782281699961524
- Marnie Ross, M.D.San Antonio, TX 782281003891631
- Tatiana Rugeles Suarez, MDSan Antonio, TX 782281447812375
Common questions
What is Guillermo Madero, MD's NPI number?
Guillermo Madero, MD's National Provider Identifier (NPI) is 1235384439, issued on Dec 2, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Guillermo Madero, MD located?
The NPPES record lists a practice address at 1499 Hillcrest Dr, San Antonio, TX, 78228. Phone: (210) 921-3800. Providers update this record themselves, so call before visiting.
How can I verify Guillermo Madero, MD's license?
NPPES lists Texas license number Q0968, 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 Guillermo Madero, MD prescribe under Medicare Part D?
In 2024, Guillermo Madero, MD had 12,937 Medicare Part D claims for 813 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.