Santiago Diaz, MD
Internal Medicine Physician · Edinburg, TX
Santiago Diaz, MD is an internal medicine physician with a practice address in Edinburg, Texas, and NPI 1316436520, issued on May 2, 2018. Check the license (Texas T2354, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Santiago Diaz
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- T2354 TX
Self-reported in NPPES; status is on the state search - Practice location
- 5501 S Mccoll RD, Edinburg, TX 78539
- Phone
- (956) 362-8677
- Enumerated
- May 2, 2018
- Record last updated
- Nov 13, 2024
- Fax
- (956) 362-7253
- Medicare enrollment
- Enrolled (PECOS I20210830000744); 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 5501 S Mccoll RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Ans Albustamy, MDInternal Medicine Physician1831713445
Verify Santiago Diaz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license T2354Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average internal medicine physician in 2024
274 Medicare Part D claims for 120 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Furosemide14 claims
- Prednisone14 claims
- Amoxicillin-Clavulanate Potass13 claims
- Atorvastatin Calcium13 claims
- Pantoprazole Sodium13 claims
- Clopidogrel11 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 81.4 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Renaissance HospitalistsEdinburg, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Santiago Diaz among 9,175 internal medicine physician records in Texas
Santiago Diaz, 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 2018, is newer than 79% of them.
- NPI issued2018 · 79% of these records are older, 18% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2018 · 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).
57 internal medicine physician records list a practice address in Edinburg
They are 57 of the 2,724 NPPES records with a practice address in Edinburg, and 9,175 internal medicine physician records in Texas.
All 9,175 in Texas → Every provider in Edinburg → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Amer Alanbari, MDEdinburg, TX 785391881615045
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- Andrew Dentino, MDEdinburg, TX 785391295739126
- Socrates Garrigos, MDEdinburg, TX 785391821052499
- Dinesh Jain, M.D.Edinburg, TX 785391619975083
- Sung Lim, MDEdinburg, TX 785391992759849
- Roberto Martinez, M.D.Edinburg, TX 785391275597593
- Oscar Mendez, M.D.Edinburg, TX 785391871565622
Common questions
What is Santiago Diaz, MD's NPI number?
Santiago Diaz, MD's National Provider Identifier (NPI) is 1316436520, issued on May 2, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Santiago Diaz, MD located?
The NPPES record lists a practice address at 5501 S Mccoll RD, Edinburg, TX, 78539. Phone: (956) 362-8677. Providers update this record themselves, so call before visiting.
How can I verify Santiago Diaz, MD's license?
NPPES lists Texas license number T2354, 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 Santiago Diaz, MD prescribe under Medicare Part D?
In 2024, Santiago Diaz, MD had 274 Medicare Part D claims for 120 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Santiago Diaz, MD's MIPS final score?
The 2023 MIPS final score is 81.4 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.