Ian Deroock, M.D.
NPI 1114900479ActiveIndividual· Internal Medicine, Hematology & Oncology· Chandler, AZ
Internal Medicine, Hematology & Oncology (M.D.) in Chandler, Arizona, trained at University of Arizona College of Medicine (class of 2003). Their prescriptions cost Medicare Part D more than their services did: $4,965,388 for 1,642 claims, against $1,893,744 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 40 companies reporting payments in 2025, $2,887 in all, mostly food and beverage.
Overview
| NPI | 1114900479 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Nov 21, 2005 |
| Last updated in NPPES | Jun 4, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 41596 | 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 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 - Hematology/Oncology (AZ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 585 |
|---|---|
| Services billed | 145,821 across 109 procedure codes |
| Paid by Medicare | $1,893,744 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,642 · 2,444 30-day fills |
|---|---|
| Patients | 227 |
| Total drug cost | $4,965,388 |
| Generic share | 67% of claims |
Education and affiliations
| Medical school | University of Arizona College of Medicine |
|---|---|
| Graduation year | 2003 |
| Medicare specialty | Hematology/Oncology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Ironwood Physicians PCChandler, AZ · 116 clinicians
Hospital affiliations
- Banner Casa Grande Medical CenterCasa Grande, AZ
- Chandler Regional Medical CenterChandler, AZ
- Mercy Gilbert Medical CenterGilbert, AZ
Industry payments (Open Payments)
- 2025$2,887 · 129 payments from 40 companies
- 2024$3,331 · 135 payments from 38 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $345.95 | 16 |
| Pfizer Inc. | $311.80 | 8 |
| Novartis Pharmaceuticals Corporation | $296.25 | 15 |
| Janssen Biotech, Inc. | $219.69 | 14 |
| Daiichi Sankyo Inc. | $150.75 | 6 |
What the 2025 payments were for
- Food and Beverage$2,805 · 126 payments
- Education$82.34 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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