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DIANA DEROSA VILLARREAL
NPI 1235525403
Pediatrics in Loma Linda, CA

Active since April 14, 2015PECOS Enrolled
11175 CAMPUS ST, DEPARTMENT OF PEDIATRICS, LOMA LINDA, CA 92350(909) 558-8142(909) 558-5981 Get Directions Write a Review

NPPES record last updated: November 29, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Nov 29, 2021, Aug 1, 2019 (2 updates tracked since 2019).

About Diana Derosa Villarreal NPPES

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

DIANA DEROSA VILLARREAL (NPI 1235525403) is an individual pediatrics provider in Loma Linda, California, licensed in California (A161918) and active in the NPI registry since April 2015. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1235525403
Entity TypeIndividualFemale
Primary Taxonomy208000000X
Provider Legal NameDIANA DEROSA VILLARREAL
Location Address11175 CAMPUS ST, DEPARTMENT OF PEDIATRICSLoma Linda, CA 92350-1700
Mailing Address11175 Campus St, Department Of PediatricsLoma Linda, CA 92350-1700 · (909) 558-8142 · Fax (909) 558-5981
Phone(909) 558-8142
Fax(909) 558-5981
Sole ProprietorNo
Enumeration DateApril 14, 2015
Last NPPES UpdateNovember 29, 20212 updates tracked since enumeration
✔ NPI 1235525403 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in CA · A161918
Definition
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
11175 CAMPUS ST, Loma Linda, CA 92350
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Other Identifiers 1

Medicaid9000169885CO

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Diana Derosa Villarreal is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Diana Villarreal reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Faculty Physicians And Surgeons Of Llusm
0.1 mi
Neurology
11234 ANDERSON ST, STE. A233
Loma Linda, CA 92354
  • Reassigned Medicare billing, California enrollment
  • 2,584 clinicians in this Medicare group
NPI 1801016860 (909) 558-2880
Southern California Permanente Medical Group
34 mi
Health Maintenance Organization
441 N LAKEVIEW AVE
Anaheim, CA 92807
  • Reassigned Medicare billing, California enrollment
  • 13,921 clinicians in this Medicare group
NPI 1952333460 (714) 279-4000

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92350 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.

Other Providers at the Same Location NPPES 20

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

DR. REX TONG HYUN CHUNG M.D.
Surgery (Surgical Critical Care)
11175 CAMPUS ST, RM 21008
LOMA LINDA, CA 92350
San Bernardino County (909) 558-8131
RITA SHETH MD
Pediatrics (Pediatric Nephrology)
11175 CAMPUS ST
LOMA LINDA, CA 92350
San Bernardino County (909) 558-8242
DARLEY R MAGNO
Student in an Organized Health Care Education/Training Program
11175 CAMPUS ST
LOMA LINDA, CA 92350
San Bernardino County (909) 558-4462
DR. DAVID CABA MOLINA M.D, MS, MPH
Surgery (Surgical Oncology)
11175 CAMPUS ST
LOMA LINDA, CA 92350
San Bernardino County (909) 558-5939
MANJOT KAUR PA-C
Physician Assistant
11175 CAMPUS ST
LOMA LINDA, CA 92350
San Bernardino County (909) 558-1000
DR. KRISTEN ANNE HUGHES M.D.
Pediatrics
11175 CAMPUS ST, SUITE 11120
LOMA LINDA, CA 92350
San Bernardino County (909) 558-4000
RITA ARTOUNIAN MILAGERDI
Physician Assistant
11175 CAMPUS ST
LOMA LINDA, CA 92350
San Bernardino County (909) 558-4000
PROF. GINA DELIA ROQUE TORRES DDS
Clinic/Center (Dental)
11175 CAMPUS ST
LOMA LINDA, CA 92350
San Bernardino County (909) 558-5933

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 Diana Villarreal's NPI number?

The NPI number for Diana Villarreal is 1235525403. It was assigned to this individual provider in the NPPES registry on April 14, 2015.

Where is Diana Villarreal located?

Diana Villarreal practices at 11175 Campus St Department Of Pediatrics, Loma Linda, CA 92350. The listed phone number is (909) 558-8142.

What is Diana Villarreal's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Diana Villarreal enrolled in Medicare?

Yes. Diana Villarreal is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Diana Villarreal's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Diana Villarreal reassigns Medicare benefits to 2 organizations: Faculty Physicians And Surgeons Of Llusm (Loma Linda, CA) and Southern California Permanente Medical Group (Anaheim, 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 Diana Villarreal'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 Diana Villarreal was last updated on November 29, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.