Fernando Diaz, MD
NPI 1902333545 · Hematology & Oncology Physician · Mcallen, TX
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Fernando Diaz, MD is a Hematology & Oncology Physician provider in Mcallen, TX (NPI 1902333545).
Provider details
- NPI number
- 1902333545
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- V2724 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
9 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
247 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 52 | $9 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 49 | $8 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 41 | $123 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 38 | $10 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 23 | $14 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Mirtazapine | 33 | 14 |
| Gabapentin | 23 | — |
| Metoprolol Succinate | 23 | — |
| Levothyroxine Sodium | 19 | — |
| Atorvastatin Calcium | 17 | — |
| Losartan Potassium | 16 | — |
| Rosuvastatin Calcium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$61 across 3 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
- 2017-05-14
- Last updated
- 2024-09-12
- Certified
- 2024-09-12
Frequently asked questions
- What is Fernando Diaz's NPI number?
- Fernando Diaz's National Provider Identifier (NPI) is 1902333545, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Fernando Diaz's specialty?
- Fernando Diaz is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Fernando Diaz located?
- Fernando Diaz's practice location on file with NPPES is 5137 Lost Creek Ln, Mcallen, TX 78504-9783.
- What is Fernando Diaz's phone number?
- The practice phone number listed in the NPPES registry for Fernando Diaz is (919) 966-1996.
- Does Fernando Diaz accept Medicare?
- Fernando Diaz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Fernando Diaz's NPI active?
- Yes — Fernando Diaz's NPI (1902333545) is active in the NPPES registry as of the last update on 2024-09-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.