Tarcisio Diaz, MD
NPI 1346379583 · Endocrinology, Diabetes & Metabolism Physician · Corona, CA
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tarcisio Diaz, MD is a Endocrinology, Diabetes & Metabolism Physician provider in Corona, CA (NPI 1346379583).
Provider details
- NPI number
- 1346379583
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- A46295 (CA)
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
19 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
606 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 159 | $185 |
| Continuous Monitoring of Blood Sugar Level in Tissue Fluid Using Sensor Under Skin With Provider Supplied Equipment95250 | 141 | $158 |
| Continuous Monitoring of Blood Sugar Level in Tissue Fluid Using Sensor Under Skin With Interpretation and Report95251 | 139 | $35 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 136 | $132 |
| Physician Or Allowed Practitioner Supervision of a Patient Receiving Medicare-Covered Services Provided By a Participating Home Health Agency (patient Not Present) Requiring Complex and Multidisciplinary Care Modalities Involving Regular Physician Or AllowG0181 | 31 | $107 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 117 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Semaglutidebrand: Ozempic | 287 | 55 |
| Atorvastatin Calcium | 253 | 83 |
| Metformin Hcl | 244 | 74 |
| Levothyroxine Sodium | 238 | 70 |
| Pioglitazone Hcl | 207 | 63 |
| Empagliflozinbrand: Jardiance | 164 | 48 |
| Tirzepatide |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,904 across 94 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
- 2007-03-05
- Last updated
- 2025-01-13
- Certified
- 2025-01-13
Frequently asked questions
- What is Tarcisio Diaz's NPI number?
- Tarcisio Diaz's National Provider Identifier (NPI) is 1346379583, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tarcisio Diaz's specialty?
- Tarcisio Diaz is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Tarcisio Diaz located?
- Tarcisio Diaz's practice location on file with NPPES is 900 S Main St, Corona, CA 92882-3401.
- What is Tarcisio Diaz's phone number?
- The practice phone number listed in the NPPES registry for Tarcisio Diaz is (951) 738-9081.
- Does Tarcisio Diaz accept Medicare?
- Tarcisio Diaz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tarcisio Diaz's NPI active?
- Yes — Tarcisio Diaz's NPI (1346379583) is active in the NPPES registry as of the last update on 2025-01-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.