Katharine Dahl, MD
NPI 1073559621ActiveIndividual· Internal Medicine, Nephrology· Phoenix, AZ
Internal Medicine, Nephrology (MD) in Phoenix, Arizona, trained at Columbia University College of Physicians and Surgeons (class of 2001). Their prescriptions cost Medicare Part D more than their services did: $337,995 for 1,323 claims, against $96,740 paid for services in 2024. Opko Pharmaceuticals, LLC was the largest of 12 companies reporting payments in 2025, $491.86 in all, mostly food and beverage.
Overview
| NPI | 1073559621 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 21, 2006 |
| Last updated in NPPES | Jun 8, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 35343 | 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 - Nephrology (AZ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 275 |
|---|---|
| Services billed | 1,659 across 25 procedure codes |
| Paid by Medicare | $96,740 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,323 · 3,184 30-day fills |
|---|---|
| Patients | 200 |
| Total drug cost | $337,995 |
| Generic share | 80% of claims |
Education and affiliations
| Medical school | Columbia University College of Physicians and Surgeons |
|---|---|
| Graduation year | 2001 |
| Medicare specialty | Nephrology |
| Telehealth | Offers telehealth |
Medical groups
- Akdhc LLCGlendale, AZ · 129 clinicians
- Banner - University Super Specialists LLCPhoenix, AZ · 34 clinicians
Hospital affiliations
- Abrazo Arrowhead HospitalGlendale, AZ
- Banner - University Medical Center PhoenixPhoenix, AZ
- Valleywise Health Medical CenterPhoenix, AZ
Other facilities
- Davita Evergreen Park DialysisDialysis facility · Phoenix, AZ
- Davita Phoenix Dialysis CenterDialysis facility · Phoenix, AZ
Industry payments (Open Payments)
- 2025$491.86 · 23 payments from 12 companies
- 2024$431.74 · 22 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Opko Pharmaceuticals, LLC | $93.34 | 5 |
| Calliditas Therapeutics US Inc. | $68.19 | 3 |
| Alexion Pharmaceuticals, Inc. | $55.07 | 2 |
| Amgen Inc. | $44.70 | 2 |
| Astrazeneca Pharmaceuticals LP | $42.90 | 2 |
What the 2025 payments were for
- Food and Beverage$378.30 · 17 payments
- Education$113.56 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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