Kristen Tillquist, DO
NPI 1033774559ActiveIndividual· Internal Medicine, Nephrology· Riverside, RI
Internal Medicine, Nephrology (DO) in Riverside, Rhode Island, trained at West Virginia School of Osteopathic Medicine (class of 2019). Their prescriptions cost Medicare Part D more than their services did: $26,681 for 133 claims, against $17,647 paid for services in 2024. Calliditas Therapeutics US Inc. was the largest of 5 companies reporting payments in 2025, $1,930 in all, mostly consulting fees.
Overview
| NPI | 1033774559 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | May 9, 2019 |
| Last updated in NPPES | Mar 5, 2026 |
| Certified by provider | Mar 5, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | DO01349 | RI |
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 - Nephrology (RI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 70 |
|---|---|
| Services billed | 145 across 15 procedure codes |
| Paid by Medicare | $17,647 |
Part D prescriptions in 2024
| Prescriptions (claims) | 133 · 235 30-day fills |
|---|---|
| Patients | 49 |
| Total drug cost | $26,681 |
| Generic share | 78% of claims |
Education and affiliations
| Medical school | West Virginia School of Osteopathic Medicine |
|---|---|
| Graduation year | 2019 |
| Medicare specialty | Nephrology |
Medical groups
- Lifespan Physician Group IncProvidence, RI · 1,173 clinicians
- Brown MedicineRiverside, RI · 217 clinicians
Hospital affiliations
- Kent County Memorial HospitalWarwick, RI
- Rhode Island HospitalProvidence, RI
- The Miriam HospitalProvidence, RI
Other facilities
- Dialysis Center of West WarwickDialysis facility · Warwick, RI
- Fresenius Medical Care of WarwickDialysis facility · Warwick, RI
Industry payments (Open Payments)
- 2025$1,930 · 13 payments from 5 companies
- 2024$54.49 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Calliditas Therapeutics US Inc. | $1,559 | 3 |
| Otsuka Pharmaceutical Development & Commercialization, Inc. | $166.81 | 2 |
| Novartis Pharmaceuticals Corporation | $118.10 | 1 |
| Alexion Pharmaceuticals, Inc. | $76.53 | 1 |
| Travere Therapeutics, Inc. | $9.78 | 6 |
What the 2025 payments were for
- Consulting Fee$1,350 · 1 payment
- Food and Beverage$569.99 · 6 payments
- Education$9.78 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All Internal Medicine, Nephrology providers in Rhode Island →