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DR. ROBERTA JEAN DUNN-DIXON M.D.
NPI 1548448970
Emergency Medicine in Riverside, CA

Active since February 07, 2008PECOS EnrolledAccepts Medicare Assignment
4443 MAGNOLIA AVE, EMERGENCY DEPARTMENT, RIVERSIDE, CA 92501(951) 788-3200 Get Directions Write a Review

NPPES record last updated: May 1, 2015. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Roberta Jean Dunn-dixon M.d. NPPES

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

DR. ROBERTA JEAN DUNN-DIXON M.D. (NPI 1548448970) is an individual emergency medicine provider in Riverside, California, licensed in California (A99540) and active in the NPI registry since February 2008. She is enrolled in Medicare PECOS and is a graduate of Texas A & M University System, Hsc, College Of Medicine (2005).

NPPES Registry Identity

NPI1548448970
Entity TypeIndividualFemale
Primary Taxonomy207P00000X
Provider Legal NameDR. ROBERTA JEAN DUNN-DIXONCredential: M.D.
Location Address4443 MAGNOLIA AVE, EMERGENCY DEPARTMENTRiverside, CA 92501
Mailing Address18510 Mockingbird Canyon RdRiverside, CA 92504-9691 · (702) 672-1443
Phone(951) 788-3200
Sole ProprietorYes
Medical School CMSTexas A & M University System, Hsc, College Of MedicineGraduated 2005
Enumeration DateFebruary 7, 2008
Last NPPES UpdateMay 1, 2015
✔ NPI 1548448970 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in CA · A99540
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
4443 MAGNOLIA AVE, Riverside, CA 92501
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Other Names 1

Professional Name (2)Dr. Roberta Jean Dunn M.d,

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

Dr. Roberta Jean Dunn-dixon 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 ID8921179987
PECOS Enrollment IDI20080618000566
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

2

Medicare enrollment records show Roberta Dunn-dixon reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Cep America - California
0.1 mi
Emergency Medicine
4445 MAGNOLIA AVE
Riverside, CA 92501
  • Reassigned Medicare billing, California enrollment
  • 2,323 clinicians in this Medicare group
NPI 1386750578 (909) 788-3000
Em Alliance California, Apc
31 mi
Emergency Medicine
25500 MEDICAL CENTER DR
Murrieta, CA 92562
  • Reassigned Medicare billing, California enrollment
  • 112 clinicians in this Medicare group
NPI 1376305755 (561) 203-0611

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.

Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
114 services112 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010
A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.
57 services54 patients
Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
54 services53 patients
Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
30 services30 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92501 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.

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 Roberta Dunn-dixon's NPI number?

The NPI number for Roberta Dunn-dixon is 1548448970. It was assigned to this individual provider in the NPPES registry on February 7, 2008. The provider is also known as Dr. Roberta Jean Dunn M.D,.

Where is Roberta Dunn-dixon located?

Roberta Dunn-dixon practices at 4443 Magnolia Ave Emergency Department, Riverside, CA 92501. The listed phone number is (951) 788-3200.

What is Roberta Dunn-dixon's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Roberta Dunn-dixon enrolled in Medicare?

Yes. Roberta Dunn-dixon 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 Roberta Dunn-dixon's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Roberta Dunn-dixon reassigns Medicare benefits to 2 organizations: Cep America - California (Riverside, CA) and Em Alliance California, Apc (Murrieta, CA). 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 Roberta Dunn-dixon'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 Roberta Dunn-dixon was last updated on May 1, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.