Alfredo Diaz, MD
NPI 1902911159 · Internal Medicine Physician · Two Rivers, WI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alfredo Diaz, MD is a Internal Medicine Physician provider in Two Rivers, WI (NPI 1902911159).
Provider details
- NPI number
- 1902911159
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 3310 (NE)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
2,244 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 677 | $114 |
| Anticoagulant Management of Patient Taking Warfarin93793 | 319 | $10 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 297 | $115 |
| Blood Test, Clotting Time85610 | 259 | $4 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 151 | $15 |
| Administration of Influenza Virus VaccineG0008 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 195 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 1,632 | 419 |
| Amlodipine Besylate | 906 | 227 |
| Losartan Potassium | 852 | 216 |
| Omeprazole | 677 | 173 |
| Levothyroxine Sodium | 672 | 142 |
| Lisinopril | 643 | 172 |
| Metoprolol Tartrate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-20
- Last updated
- 2021-12-01
- Certified
- 2021-12-01
Frequently asked questions
- What is Alfredo Diaz's NPI number?
- Alfredo Diaz's National Provider Identifier (NPI) is 1902911159, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alfredo Diaz's specialty?
- Alfredo Diaz is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Alfredo Diaz located?
- Alfredo Diaz's practice location on file with NPPES is 2219 Garfield St, Two Rivers, WI 54241.
- What is Alfredo Diaz's phone number?
- The practice phone number listed in the NPPES registry for Alfredo Diaz is (920) 793-2281.
- Does Alfredo Diaz accept Medicare?
- Alfredo Diaz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alfredo Diaz's NPI active?
- Yes — Alfredo Diaz's NPI (1902911159) is active in the NPPES registry as of the last update on 2021-12-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.