Andrew Mel Diaz, DO
NPI 1255951786ActiveIndividual· Internal Medicine· Huntley, IL
Internal Medicine (DO) in Huntley, Illinois, trained at At Still University of Health Sciences, College of Osteo Med, Kirksville (class of 2020). In 2024 Medicare paid $105,558 for 435 patients, and Part D covered 378 of their prescriptions, 87% of them generic.
Overview
| NPI | 1255951786 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Apr 24, 2020 |
| Last updated in NPPES | Apr 16, 2026 |
| Certified by provider | Apr 16, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 036164669 | IL |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Hospitalist (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 435 |
|---|---|
| Services billed | 1,296 across 17 procedure codes |
| Paid by Medicare | $105,558 |
Part D prescriptions in 2024
| Prescriptions (claims) | 378 · 500 30-day fills |
|---|---|
| Patients | 175 |
| Total drug cost | $32,882 |
| Generic share | 87% of claims |
Education and affiliations
| Medical school | At Still University of Health Sciences, College of Osteo Med, Kirksville |
|---|---|
| Graduation year | 2020 |
| Medicare specialty | Hospitalist |
Medical group
- Northwestern Medical Faculty FoundationChicago, IL · 4,503 clinicians
Hospital affiliations
- Northwestern Medicine McHenryMcHenry, IL
- Northwestern Memorial HospitalChicago, IL
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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