David Jon Grossklaus, M.D.
NPI 1750355392ActiveIndividual· Urology· Mesa, AZ
Urology (M.D.) in Mesa, Arizona, trained at University of Arizona College of Medicine (class of 1996). 1,555 Medicare patients in 2024, $484,812 paid; nearly all of their 3,194 Part D prescriptions were generic (96%). Abbvie Inc. was the largest of 12 companies reporting payments in 2025, $655.58 in all, mostly food and beverage.
Overview
| NPI | 1750355392 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Feb 13, 2006 |
| Last updated in NPPES | Aug 8, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Urology Primary | 208800000X | 25961 | AZ |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Urology (AZ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,555 |
|---|---|
| Services billed | 15,289 across 74 procedure codes |
| Paid by Medicare | $484,812 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,194 · 6,862 30-day fills |
|---|---|
| Patients | 955 |
| Total drug cost | $184,363 |
| Generic share | 96% of claims |
Education and affiliations
| Medical school | University of Arizona College of Medicine |
|---|---|
| Graduation year | 1996 |
| Medicare specialty | Urology |
Medical group
- David J. Grossklaus, M.D.,p.C.Mesa, AZ · 2 clinicians
Hospital affiliations
- Banner Baywood Medical CenterMesa, AZ
- Cobre Valley Regional Medical CenterGlobe, AZ
- Mercy Gilbert Medical CenterGilbert, AZ
Industry payments (Open Payments)
- 2025$655.58 · 34 payments from 12 companies
- 2024$515.67 · 31 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $202.31 | 17 |
| Sumitomo Pharma America, Inc. | $118.60 | 5 |
| Boston Scientific Corporation | $67.35 | 2 |
| Angiodynamics, Inc. | $49.72 | 1 |
| Ferring Pharmaceuticals Inc. | $39.18 | 2 |
What the 2025 payments were for
- Food and Beverage$655.58 · 34 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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