Quick answers
- Where does Alwin A. Diaz see patients?
- Medicare's clinician data lists 2 practice locations, including Milwaukee, WI. Call before your visit to confirm the address.
- What is Alwin A. Diaz's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Alwin A. Diaz accept Medicare assignment?
- Yes. Medicare's clinician data says Alwin A. Diaz accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does Alwin A. Diaz offer telehealth?
- Medicare's clinician data says Alwin A. Diaz offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Alwin A. Diaz?
- (414) 376-5577, as listed in official Medicare / NPI Registry data.
- What is Alwin A. Diaz's NPI number?
- 1245610658. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Alwin A. Diaz is enrolled with Medicare (CMS data updated 2026-10-02).
- 4650 S Howell AveMilwaukee, WI 53207 (414) 376‑5577
- 5408 W Burleigh StMilwaukee, WI 53210 (414) 362‑8147
Group practices
Medicare enrollment lists Alwin A. Diaz as a member of this group (CMS data updated 2026-10-02).
- Horizon Healthcare, Inc15 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Milwaukee
Clinicians with the same Medicare primary specialty in Milwaukee, WI — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2014 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1245610658 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians