Zachary William Abraham Klaassen, M.D.
NPI 1891082772ActiveIndividual· Urology· Augusta, GA
Urology (M.D.) with Wellstar Medical Group LLC, practicing in Augusta, Georgia. Their prescriptions cost Medicare Part D more than their services did: $537,491 for 219 claims, against $43,798 paid for services in 2024. Teleflex LLC was the largest of 18 companies reporting payments in 2025, $290,518 in all, mostly speaking and faculty fees. Lists Aiken Regional Medical Center and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1891082772 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jun 29, 2011 |
| Last updated in NPPES | Mar 27, 2026 |
| Certified by provider | Mar 27, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Urology Primary | 208800000X | 081333 | GA |
| Surgery | 208600000X | 081333 | GA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Urology (GA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 305 |
|---|---|
| Services billed | 602 across 52 procedure codes |
| Paid by Medicare | $43,798 |
Part D prescriptions in 2024
| Prescriptions (claims) | 219 · 456 30-day fills |
|---|---|
| Patients | 61 |
| Total drug cost | $537,491 |
| Generic share | 83% of claims |
Education and affiliations
| Graduation year | 2010 |
|---|---|
| Medicare specialty | Urology |
| Telehealth | Offers telehealth |
Medical group
- Wellstar Medical Group LLCMarietta, GA · 3,093 clinicians
Hospital affiliations
- Aiken Regional Medical CenterAiken, SC
- St Marys Good Samaritan HospitalGreensboro, GA
- Wellstar McG Health, Affiliated With Med ColAugusta, GA
Industry payments (Open Payments)
- 2025$290,518 · 257 payments from 18 companies
- 2024$258,921 · 222 payments from 22 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Teleflex LLC | $161,644 | 145 |
| Bayer Healthcare Pharmaceuticals Inc. | $104,913 | 65 |
| Urogen Pharma, Inc. | $6,334 | 9 |
| Janssen Biotech, Inc. | $4,271 | 9 |
| Novartis Pharmaceuticals Corporation | $2,700 | 1 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$196,792 · 72 payments
- Consulting Fee$65,550 · 35 payments
- Travel and Lodging$15,120 · 60 payments
- Food and Beverage$7,956 · 89 payments
- Honoraria$5,100 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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