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GRETA EUGENIA RIOS-STEED MD
NPI 1649708397
Family Medicine in Corona, CA

Active since May 25, 2017PECOS EnrolledAccepts Medicare Assignment
495 E RINCON ST STE 215, CORONA, CA 92879(855) 505-7467 Get Directions Write a Review

NPPES record last updated: February 26, 2024. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Aug 28, 2020, Apr 15, 2020, Sep 16, 2017 and 1 more (4 updates tracked since 2017).

About Greta Eugenia Rios-steed Md NPPES

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

GRETA EUGENIA RIOS-STEED MD (NPI 1649708397) is an individual family medicine provider in Corona, California, licensed in California (A166356) and active in the NPI registry since May 2017. She is enrolled in Medicare PECOS and is a graduate of Other (2016).

NPPES Registry Identity

NPI1649708397
Entity TypeIndividualFemale
Primary Taxonomy207Q00000X
Provider Legal NameGRETA EUGENIA RIOS-STEEDCredential: MD
Location Address495 E RINCON ST STE 215Corona, CA 92879-1378
Mailing Address495 E Rincon St Ste 215Corona, CA 92879-1378 · (855) 505-7467
Phone(855) 505-7467
Sole ProprietorNo
Medical School CMSOtherGraduated 2016
Enumeration DateMay 25, 2017
Last NPPES UpdateFebruary 26, 20244 updates tracked since enumeration
NPPES CertifiedFebruary 26, 2024
✔ NPI 1649708397 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
Licenses✔ Licensed in CA · A166356✔ Licensed in NV · 19493✔ Licensed in AZ · 61896
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
495 E RINCON ST STE 215, Corona, CA 92879
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Other Names 1

Other Name (5)Greta Eugenia Gonzalez-rios Md

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Greta Eugenia Rios-steed Md 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 ID3476824871
PECOS Enrollment IDI20200706000849
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.

Medicare Billing Reassignments

6

Medicare enrollment records show Greta Rios-steed reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Alessandro Medical Professional Corporation
2.1 mi
Family Medicine
1530 W 6TH ST STE 109
Corona, CA 92882
  • Reassigned Medicare billing, California enrollment
  • 24 clinicians in this Medicare group
NPI 1184265183 (855) 505-7467
Southern California Permanente Medical Group
5.4 mi
Health Maintenance Organization
10800 MAGNOLIA AVE
Riverside, CA 92505
  • Reassigned Medicare billing, California enrollment
  • 5,228 clinicians in this Medicare group
NPI 1316979834 (866) 984-7483
Javier R Rios MD, A Professional Corporation
6.4 mi
Family Medicine
9939 MAGNOLIA AVE
Riverside, CA 92503
  • Reassigned Medicare billing, California enrollment
  • 28 clinicians in this Medicare group
NPI 1235138363 (855) 505-7467
Dr. Javier Rios A Medical Corporation
16 mi
Family Medicine
21091 RIDER ST, STE 218
Perris, CA 92570
  • Reassigned Medicare billing, California enrollment
  • 24 clinicians in this Medicare group
NPI 1942631460 (855) 505-7467
Javier R Rios MD A Medical Professional Corporation
399 mi
Family Medicine
3770 S 16TH AVE
Tucson, AZ 85713
  • Reassigned Medicare billing, Arizona enrollment
  • 11 clinicians in this Medicare group
NPI 1497829949 (520) 620-1200
Montclair Medical Professional Corporation
  • Reassigned Medicare billing, California enrollment
  • 17 clinicians in this Medicare group
No phone listed

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 4

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.

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.
88 services69 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
30 services26 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
22 services19 patients
Insertion of needle into vein for collection of blood sample 36415
This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.
20 services19 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
$91.88 typical visit price
range $59.60 – $179.42
Typical copayment $22.97 (range $14.90 – $44.85)
Most-billed visit code 99203
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.

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
4 suppliers12 claims21 services$5.95 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Greta Rios-steed's NPI number?

The NPI number for Greta Rios-steed is 1649708397. It was assigned to this individual provider in the NPPES registry on May 25, 2017. The provider is also known as Greta Eugenia Gonzalez-Rios MD.

Where is Greta Rios-steed located?

Greta Rios-steed practices at 495 E Rincon St Ste 215, Corona, CA 92879. The listed phone number is (855) 505-7467.

What is Greta Rios-steed's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Greta Rios-steed enrolled in Medicare?

Yes. Greta Rios-steed is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Greta Rios-steed's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Greta Rios-steed reassigns Medicare benefits to 6 organizations: Alessandro Medical Professional Corporation (Corona, CA), Southern California Permanente Medical Group (Riverside, CA), Javier R Rios MD, A Professional Corporation (Riverside, CA), Dr. Javier Rios A Medical Corporation (Perris, CA), Javier R Rios MD A Medical Professional Corporation (Tucson, AZ) and 1 more organization, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Greta Rios-steed's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Greta Rios-steed was last updated on February 26, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.