William L. Weiss, MD, PC
NPI 1881686368ActiveIndividual· Internal Medicine, Nephrology· Phoenix, AZ
Internal Medicine, Nephrology (MD, PC) in Phoenix, Arizona, trained at R Franklin University of Med & Sci/Chicago Medical School (class of 1998). Their prescriptions cost Medicare Part D more than their services did: $275,260 for 2,318 claims, against $143,548 paid for services in 2024. Amgen Inc. was the largest of 7 companies reporting payments in 2025, $638.74 in all, mostly food and beverage.
Overview
| NPI | 1881686368 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD, PC |
| Sole proprietor | No |
| NPI issued | Aug 19, 2005 |
| Last updated in NPPES | Aug 21, 2020 |
| Certified by provider | Aug 21, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 31284 | AZ |
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 - Nephrology (AZ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 138 |
|---|---|
| Services billed | 2,753 across 17 procedure codes |
| Paid by Medicare | $143,548 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,318 · 5,033 30-day fills |
|---|---|
| Patients | 344 |
| Total drug cost | $275,260 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | R Franklin University of Med & Sci/Chicago Medical School |
|---|---|
| Graduation year | 1998 |
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
Medical groups
- City of Hope Medical Group of Arizona LLCGoodyear, AZ · 160 clinicians
- William L Weiss MD PCPhoenix, AZ · 4 clinicians
Hospital affiliation
- Banner Estrella Medical CenterPhoenix, AZ
Other facilities
- 032639 Estrella Mountain Dialysis, LLC (Ara)Dialysis facility · Phoenix, AZ
Industry payments (Open Payments)
- 2025$638.74 · 19 payments from 7 companies
- 2024$1,411 · 47 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $171.52 | 8 |
| Calliditas Therapeutics US Inc. | $124.99 | 1 |
| Akebia Therapeutics Inc | $121.75 | 1 |
| Daiichi Sankyo Inc. | $73.85 | 3 |
| Novartis Pharmaceuticals Corporation | $64.90 | 3 |
What the 2025 payments were for
- Food and Beverage$638.74 · 19 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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