Sergio Diaz, PHYSICIAN ASSISTANT
Family Medicine Physician · McAllen, TX
Sergio Diaz, PHYSICIAN ASSISTANT is a family medicine physician with a practice address in McAllen, Texas, and NPI 1740423474, issued on Apr 10, 2009. Check the license (Texas TXPA04894, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Sergio Diaz
- Credential
- PHYSICIAN ASSISTANT
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- TXPA04894 TX
Self-reported in NPPES; status is on the state search - Practice location
- 110 E Savannah Ave Bldg A204, McAllen, TX 78503
- Phone
- (956) 686-4040
- Enumerated
- Apr 10, 2009
- Record last updated
- May 18, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (956) 630-6088
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 11,119 in Texas → Look up another NPI →
Verify Sergio Diaz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license TXPA04894Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.0 times the Medicare Part D claims of the average family medicine physician in 2024
7,101 Medicare Part D claims for 520 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims. 83 claims were for opioids.
Most prescribed
- Atorvastatin Calcium352 claims
- Rosuvastatin Calcium315 claims
- Levothyroxine Sodium263 claims
- Losartan Potassium262 claims
- Ozempic246 claims
- Amlodipine Besylate245 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: $742.93
38 payments; by number, the most common kind was food and beverage; the largest payer was Abbott Laboratories. The 55,478 providers of this specialty with any payment received $902.55 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.
Sergio Diaz among 11,119 family medicine physician records in Texas
Sergio Diaz, PHYSICIAN ASSISTANT 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 2009, is newer than 59% of them.
- NPI issued2009 · 59% of these records are older, 38% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileNo · 64% of these records are
- Record last updated2009 · 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).
121 family medicine physician records list a practice address in McAllen
They are 121 of the 3,518 NPPES records with a practice address in McAllen, and 11,119 family medicine physician records in Texas.
All 11,119 in Texas → Every provider in McAllen → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Charles Austin, MDMcAllen, TX 785031205879590
- Oscar Cortes, MDMcAllen, TX 785031164459756
- Andrew Dela Garza, M.D.McAllen, TX 785031043265671
- Carmen Gomez Fitzpatrick, M.D.McAllen, TX 785031427056381
- Enrique Griego, M.D.McAllen, TX 785031164432506
- Mario Guerra, M.D.McAllen, TX 785031760587760
- Sunand Kallumadanda, MDMcAllen, TX 785031588712848
- Alfredo Lopez, MDMcAllen, TX 785031750307831
Common questions
What is Sergio Diaz, PHYSICIAN ASSISTANT's NPI number?
Sergio Diaz, PHYSICIAN ASSISTANT's National Provider Identifier (NPI) is 1740423474, issued on Apr 10, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Sergio Diaz, PHYSICIAN ASSISTANT located?
The NPPES record lists a practice address at 110 E Savannah Ave Bldg A204, McAllen, TX, 78503. Phone: (956) 686-4040. Providers update this record themselves, so call before visiting.
How can I verify Sergio Diaz, PHYSICIAN ASSISTANT's license?
NPPES lists Texas license number TXPA04894, 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 Sergio Diaz, PHYSICIAN ASSISTANT prescribe under Medicare Part D?
In 2024, Sergio Diaz, PHYSICIAN ASSISTANT had 7,101 Medicare Part D claims for 520 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.