DORA CECILIA RIOJA-MAZZA MD
NPI 1154575157
Pediatrics in Dulles, VA

Q: What is Dora Rioja-mazza's NPI number?

The NPI number for Dora Rioja-mazza is 1154575157. It was assigned to this individual provider in the NPPES registry on November 5, 2008.

Q: What is Dora Rioja-mazza's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Dora Rioja-mazza was last updated on September 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months 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.

Active since November 05, 2008PECOS Enrolled

24440 STONE SPRINGS BLVD, DULLES, VA 20166(571) 349-5271 Get Directions Write a Review

NPPES record last updated: September 17, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 17, 2025, Jul 19, 2021 (2 updates tracked since 2021).

On this page

About Dora Cecilia Rioja-mazza Md NPPES

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

DORA CECILIA RIOJA-MAZZA MD (NPI 1154575157) is an individual pediatrics provider in Dulles, Virginia, licensed in Maryland (D0068381) and active in the NPI registry since November 2008. She is enrolled in Medicare PECOS and maintains a secondary practice location in Baltimore.

NPPES Registry Identity

NPI1154575157

Entity TypeIndividualFemale

Primary Taxonomy208000000X

Provider Legal NameDORA CECILIA RIOJA-MAZZACredential: MD

Location Address24440 STONE SPRINGS BLVDDulles, VA 20166-2247

Mailing Address3449 Wilkens Ave Ste 308Baltimore, MD 21229-5218 · (410) 646-1200 · Fax (240) 686-2330

Phone(571) 349-5271

Sole ProprietorNo

Enumeration DateNovember 5, 2008

Last NPPES UpdateSeptember 17, 20252 updates tracked since enumeration

NPPES CertifiedSeptember 17, 2025

✔ NPI 1154575157 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians

Taxonomy Code208000000X

License✔ Licensed in MD · D0068381

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.

Also ListedPediatrics · Neonatal-Perinatal MedicineTaxonomy 2080N0001X · License 01012442254 (VA)

24440 STONE SPRINGS BLVD, Dulles, VA 20166

Open in Google Maps ↗

Secondary Practice Location 1

Location 13449 Wilkens Ave Ste 308Baltimore, MD 21229-5218 · Phone (410) 646-1200

Other Identifiers 5

OtherGM200002MD · Carefirst

Medicaid419752601MD

Other15618449MD · Wellpoint

OtherPDZ000000319529MD · Aetnabetterhealth

Other003429043005MD · Unitedhealthcare

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dora Cecilia Rioja-mazza Md 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 Reassignment

Medicare enrollment records show Dora Rioja-mazza reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Emergency Medicine Associates, P.A.,p.C.

Same address

Internal Medicine

24440 STONE SPRINGS BOULEVARD
Dulles, VA 20166

Reassigned Medicare billing, Virginia enrollment
1,294 clinicians in this Medicare group

NPI 1376917070 (202) 574-6000

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 20166 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

$86.88 typical visit price

range $56.19 – $170.30

Typical copayment $21.72 (range $14.04 – $42.57)

Most-billed visit code 99203

Established Patient

$99.13 typical visit price

range $18.07 – $138.91

Typical copayment $24.78 (range $4.51 – $34.72)

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 17

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

KATHLEEN DONOVAN

Registered Nurse (Lactation Consultant)