NATALIA CHAVEZ STEWART M.D.
NPI 1235278250
Internal Medicine - Rheumatology in Corona, CA

Q: What is Natalia Chavez Stewart's NPI number?

The NPI number for Natalia Chavez Stewart is 1235278250. It was assigned to this individual provider in the NPPES registry on February 6, 2007. The provider is also known as Dr. Natalia Rocio Chavez Chiang M.D..

Q: What is Natalia Chavez Stewart's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.

Active since February 06, 2007PECOS EnrolledAccepts Medicare Assignment

341 MAGNOLIA AVE STE 206, CORONA, CA 92879(951) 209-0008(951) 209-0017 Get Directions Write a Review

NPPES record last updated: December 11, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Dec 11, 2025, Jan 2, 2020 (2 updates tracked since 2020).

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About Natalia Chavez Stewart M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

NATALIA CHAVEZ STEWART M.D. (NPI 1235278250) is an individual rheumatology provider in Corona, California, licensed in California (A131993) and active in the NPI registry since February 2007. She is enrolled in Medicare PECOS and is a graduate of Other (2002).

NPPES Registry Identity

NPI1235278250

Entity TypeIndividualFemale

Primary Taxonomy207RR0500X

Provider Legal NameNATALIA CHAVEZ STEWARTCredential: M.D.

Location Address341 MAGNOLIA AVE STE 206Corona, CA 92879-3332

Mailing Address341 Magnolia Ave Ste 206Corona, CA 92879-3332 · (951) 209-0008 · Fax (951) 209-0017

Phone(951) 209-0008

Fax(951) 209-0017

Sole ProprietorNo

Medical School CMSOtherGraduated 2002

Enumeration DateFebruary 6, 2007

Last NPPES UpdateDecember 11, 20252 updates tracked since enumeration

NPPES CertifiedDecember 11, 2025

✔ NPI 1235278250 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · RheumatologyAllopathic & Osteopathic Physicians

Taxonomy Code207RR0500X

License✔ Licensed in CA · A131993

Definition

An internist who treats diseases of joints, muscle, bones and tendons. This specialist diagnoses and treats arthritis, back pain, muscle strains, common athletic injuries and collagen diseases.

341 MAGNOLIA AVE STE 206, Corona, CA 92879

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Other Names 1

Former Name (1)Dr. Natalia Rocio Chavez Chiang M.d.

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Natalia Chavez Stewart M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4284805763

PECOS Enrollment IDI20150707000652

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 9

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Injection, denosumab, 1 mg J0897

Denosumab is a medication given via injection to strengthen your bones. It works by slowing down the cells that break down bone, improving bone density and reducing the risk of fractures. It's often used for osteoporosis treatment.

1,620 services17 patients

Injection, triamcinolone acetonide, not otherwise specified, 10 mg J3301

Triamcinolone acetonide is a medication used to reduce inflammation in the body. It's given as a 10 mg injection for conditions like allergies, arthritis, or skin problems. The injection helps to decrease swelling, redness, and itching.

662 services73 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

445 services181 patients

Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month 99490

Chronic care management services involve a healthcare professional directing clinical staff in managing your chronic conditions. This includes the first 20 minutes per month of services like medication management, care coordination, and health monitoring to help improve your health and quality of life.

131 services40 patients

Aspiration and/or injection of fluid from large joint 20610

This procedure involves using a needle to remove (aspiration) or introduce (injection) fluid into a large joint like the knee or hip. It can help diagnose conditions, relieve discomfort, or deliver medication directly to the joint.

70 services40 patients

Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less 96365

This is a procedure where a medical professional inserts a small tube into your vein to deliver medication, nutrients, or fluids directly into your bloodstream. This can be for treatment, prevention, or diagnosis. The process typically takes less than an hour.

55 services20 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92879 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$136.04 typical visit price

range $59.60 – $179.42

Typical copayment $34.01 (range $14.90 – $44.85)

Most-billed visit code 99204

Established Patient

$104.64 typical visit price

range $19.37 – $146.42

Typical copayment $26.16 (range $4.84 – $36.60)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 5

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

LAURA CAROLINA NIEVES MD

Internal Medicine