Quick answers
- Where does Joseph Diaz see patients?
- Medicare's clinician data lists 2 practice locations, including Maryville, IL and Shiloh, IL. Call before your visit to confirm the address.
- What is Joseph Diaz's specialty?
- Medicare lists Allergy/Immunology as the primary specialty.
- Does Joseph Diaz accept Medicare assignment?
- Yes. Medicare's clinician data says Joseph 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.
- What is the phone number for Joseph Diaz?
- (618) 624-2060, as listed in official Medicare / NPI Registry data.
- What is Joseph Diaz's NPI number?
- 1417948241. 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 Joseph Diaz is enrolled with Medicare (CMS data updated 2026-10-02).
- 2023 Vadalabene Dr, Suite 151Maryville, IL 62062 (618) 624‑2060
- 325 Tamarack LnShiloh, IL 62269 (618) 624‑2060
Group practices
Medicare enrollment lists Joseph Diaz as a member of this group (CMS data updated 2026-10-02).
- Allergy Asthma and Immunology Center SC6 clinicians in the group
Specialties
- Allergy/Immunologyprimary
Other allergist and immunologists in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1983 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1417948241 |
| 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