Natalia Chavez Stewart, M.D.
NPI 1235278250 · Rheumatology Physician · Corona, CA
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Natalia Chavez Stewart, M.D. is a Rheumatology Physician provider in Corona, CA (NPI 1235278250).
Provider details
- NPI number
- 1235278250
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A131993 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,125 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 445 | $131 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 316 | $16 |
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 131 | $64 |
| Aspiration And/Or Injection of Fluid From Large Joint20610 | 70 | $80 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, 1 Hour Or Less96365 | 55 | $66 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 34 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydroxychloroquine Sulfate | 449 | 114 |
| Methotrexate Sodiumbrand: Methotrexate | 250 | 64 |
| Gabapentin | 227 | 71 |
| Upadacitinibbrand: Rinvoq | 141 | 23 |
| Diclofenac Sodium | 117 | 42 |
| Alendronate Sodium | 112 | 34 |
| Cyclobenzaprine Hcl | 111 | 49 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$3,967 across 194 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-02-06
- Last updated
- 2025-12-11
- Certified
- 2025-12-11
Frequently asked questions
- What is Natalia Chavez Stewart's NPI number?
- Natalia Chavez Stewart's National Provider Identifier (NPI) is 1235278250, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Natalia Chavez Stewart's specialty?
- Natalia Chavez Stewart is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Natalia Chavez Stewart located?
- Natalia Chavez Stewart's practice location on file with NPPES is 341 Magnolia Ave Ste 206, Corona, CA 92879-3332.
- What is Natalia Chavez Stewart's phone number?
- The practice phone number listed in the NPPES registry for Natalia Chavez Stewart is (951) 209-0008.
- Does Natalia Chavez Stewart accept Medicare?
- Natalia Chavez Stewart is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Natalia Chavez Stewart's NPI active?
- Yes — Natalia Chavez Stewart's NPI (1235278250) is active in the NPPES registry as of the last update on 2025-12-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.