Sergio Diaz, PHYSICIAN ASSISTANT
NPI 1740423474 · Family Medicine Physician · Mcallen, TX
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sergio Diaz, PHYSICIAN ASSISTANT is a Family Medicine Physician provider in Mcallen, TX (NPI 1740423474).
Provider details
- NPI number
- 1740423474
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- PHYSICIAN ASSISTANT
- Sex
- Male
- Sole proprietor
- Yes
- License
- TXPA04894 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
17 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 118 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 352 | 123 |
| Rosuvastatin Calcium | 315 | 113 |
| Levothyroxine Sodium | 263 | 88 |
| Losartan Potassium | 262 | 88 |
| Semaglutidebrand: Ozempic | 246 | 51 |
| Amlodipine Besylate | 245 | 88 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$743 across 38 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-04-10
- Last updated
- 2009-05-18
Frequently asked questions
- What is Sergio Diaz's NPI number?
- Sergio Diaz's National Provider Identifier (NPI) is 1740423474, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sergio Diaz's specialty?
- Sergio Diaz is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Sergio Diaz located?
- Sergio Diaz's practice location on file with NPPES is 110 E Savannah Ave Bldg A204, Mcallen, TX 78503-1239.
- What is Sergio Diaz's phone number?
- The practice phone number listed in the NPPES registry for Sergio Diaz is (956) 686-4040.
- Does Sergio Diaz accept Medicare?
- Sergio Diaz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sergio Diaz's NPI active?
- Yes — Sergio Diaz's NPI (1740423474) is active in the NPPES registry as of the last update on 2009-05-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.