Natalia Chavez Stewart, M.D.
NPI 1235278250ActiveIndividual· Internal Medicine, Rheumatology· Corona, CA
Internal Medicine, Rheumatology (M.D.) with Prohealth Partners, A Medical Group and 1 other group, practicing in Corona, California. Their prescriptions cost Medicare Part D more than their services did: $2,795,758 for 2,511 claims, against $240,204 paid for services in 2024. Abbvie Inc. was the largest of 16 companies reporting payments in 2025, $3,644 in all, mostly food and beverage.
Overview
| NPI | 1235278250 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Feb 6, 2007 |
| Last updated in NPPES | Dec 11, 2025 |
| Certified by provider | Dec 11, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Rheumatology Primary | 207RR0500X | A131993 | CA |
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 (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 196 |
|---|---|
| Services billed | 9,538 across 43 procedure codes |
| Paid by Medicare | $240,204 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,511 · 5,094 30-day fills |
|---|---|
| Patients | 390 |
| Total drug cost | $2,795,758 |
| Generic share | 82% of claims |
Education and affiliations
| Graduation year | 2002 |
|---|---|
| Medicare specialty | Rheumatology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- Prohealth Partners, A Medical GroupLong Beach, CA · 239 clinicians
- Southland Arthrites and Osteoporosis Medical Center IncRiverside, CA · 6 clinicians
Industry payments (Open Payments)
- 2025$3,644 · 180 payments from 16 companies
- 2024$4,002 · 195 payments from 20 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $849.86 | 55 |
| Amgen Inc. | $723.95 | 35 |
| Ucb, Inc. | $572.53 | 23 |
| Radius Health, Inc. | $317.81 | 12 |
| Glaxosmithkline, LLC. | $278.73 | 12 |
What the 2025 payments were for
- Food and Beverage$3,644 · 180 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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