James O. Posever, MD
NPI 1154364214ActiveIndividual· Internal Medicine, Rheumatology· Phoenix, AZ
Internal Medicine, Rheumatology (MD) in Phoenix, Arizona, trained at Northwestern University Feinberg Medical School (class of 1991). Their prescriptions cost Medicare Part D more than their services did: $981,665 for 708 claims, against $6,907 paid for services in 2024. Mallinckrodt Hospital Products Inc. was the largest of 3 companies reporting payments in 2025, $291.02 in all, mostly food and beverage.
Overview
| NPI | 1154364214 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 14, 2006 |
| Last updated in NPPES | Sep 24, 2026 |
| Certified by provider | Sep 24, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Rheumatology Primary | 207RR0500X | 29356 | AZ |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Rheumatology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 59 |
|---|---|
| Services billed | 200 across 11 procedure codes |
| Paid by Medicare | $6,907 |
Part D prescriptions in 2024
| Prescriptions (claims) | 708 · 1,324 30-day fills |
|---|---|
| Patients | 88 |
| Total drug cost | $981,665 |
| Generic share | 65% of claims |
Education and affiliations
| Medical school | Northwestern University Feinberg Medical School |
|---|---|
| Graduation year | 1991 |
| Medicare specialty | Rheumatology |
| Secondary specialties | Internal Medicine |
Medical group
- Dhew Ind Hlth Sv Hlth Svs and Mntl Hlth AdmPhoenix, AZ · 227 clinicians
Hospital affiliation
- Phoenix Indian Medical CenterPhoenix, AZ
Industry payments (Open Payments)
- 2025$291.02 · 3 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Mallinckrodt Hospital Products Inc. | $149.99 | 1 |
| Astrazeneca Pharmaceuticals LP | $81.04 | 1 |
| Janssen Biotech, Inc. | $59.99 | 1 |
What the 2025 payments were for
- Food and Beverage$291.02 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other rheumatologists in Phoenix
- 1033156062
- 1073675526
- 1194771931
- 1295095495
- 1336110576
- 1356302962
- 1396784161
- 1427049220
- 1437139151
- 1508251091
- 1538695317
- 1659341667
All 37 rheumatologists in Phoenix · All rheumatologists in Arizona