Joseph Diaz, M.D.
NPI 1417948241 · Allergy & Immunology Physician · San Antonio, TX
Enrolled with Medicare as Practitioner - Allergy/Immunology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joseph Diaz, M.D. is a Allergy & Immunology Physician provider in San Antonio, TX (NPI 1417948241).
Provider details
- NPI number
- 1417948241
- Entity type
- Individual
- Primary specialty
- Allergy & Immunology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G4980 (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
20 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
772 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) |
|---|---|---|
| Professional Service for Preparation and Provision of 1 Or More Antigens95165 | 340 | $14 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 152 | $119 |
| Test to Measure Expiratory Airflow and Volume94010 | 89 | $25 |
| Test to Measure the Level of Nitric Oxide Gas95012 | 71 | $18 |
| Professional Service for Multiple Injections of Allergen95117 | 60 | $11 |
| Administration of Non-Hormonal Anti-Neoplastic Chemotherapy Under Skin Or Into Muscle96401 | 60 | $66 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 25 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Fluticasone Propionate | 103 | 41 |
| Montelukast Sodium | 86 | 29 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 56 | 25 |
| Azelastine Hcl | 56 | 24 |
| Fluticasone/Vilanterolbrand: Breo Ellipta | 37 | — |
| Dupilumabbrand: Dupixent Syringe | 37 | — |
| Omeprazole |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$174,160 across 295 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
- 2005-11-01
- Last updated
- 2007-10-16
Frequently asked questions
- What is Joseph Diaz's NPI number?
- Joseph Diaz's National Provider Identifier (NPI) is 1417948241, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joseph Diaz's specialty?
- Joseph Diaz is listed in the NPPES registry with a primary specialty of Allergy & Immunology Physician (Allopathic & Osteopathic Physicians).
- Where is Joseph Diaz located?
- Joseph Diaz's practice location on file with NPPES is 2414 Babcock Rd, San Antonio, TX 78229-4870.
- What is Joseph Diaz's phone number?
- The practice phone number listed in the NPPES registry for Joseph Diaz is (210) 616-0882.
- Does Joseph Diaz accept Medicare?
- Joseph Diaz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joseph Diaz's NPI active?
- Yes — Joseph Diaz's NPI (1417948241) is active in the NPPES registry as of the last update on 2007-10-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.