Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dora Cecilia Rioja-Mazza, MD

Pediatrics Physician in Dulles, VA · enumerated 2008.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1154575157

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Registry record

Entity type Individual (Type 1)

Name Dora Cecilia Rioja-Mazza

Credential MD

Sex Female

Practice address 24440 Stone Springs Blvd, Dulles, VA, 20166

Phone (571) 349-5271

Enumeration date Nov 5, 2008

Last updated in NPPES Sep 17, 2025

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License D0068381 (MD) Primary

2080N0001X Neonatal-Perinatal Medicine Physician Allopathic & Osteopathic Physicians · License 01012442254 (VA) Secondary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
GM200002	Other	MD	CAREFIRST
419752601	Medicaid	MD	-
15618449	Other	MD	WELLPOINT
PDZ000000319529	Other	MD	AETNABETTERHEALTH
003429043005	Other	MD	UNITEDHEALTHCARE

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Is NPI 1154575157 active?

Yes, as of the latest NPPES snapshot, NPI 1154575157 is active (record last updated 2025-09-17).

How do I verify Dora Rioja-Mazza's NPI record?

Cross-check NPI 1154575157 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Iris Ferguson Registered Nurse First Assistant · Dulles, VA NPI 1215273040 Oakjoo Lee Registered Nurse First Assistant · Dulles, VA NPI 1881026904 Stonesprings Anesthesia Associates, Ltd Anesthesiology Physician · Dulles, VA NPI 1255718235 Mdics at Stonesprings, LLC Hospitalist Physician · Dulles, VA NPI 1194100594 Vesper Medical Associates of Virginia Critical Care Medicine (Internal Medicine) Physician · Dulles, VA NPI 1356790497 Northern Virginia Community Hospital LLC Cardiovascular Disease Physician · Dulles, VA NPI 1669923967 Mital Sarada Registered Dietitian · Dulles, VA NPI 1467990309 Dominion Surgical Assistants, LLC Registered Nurse First Assistant · Dulles, VA NPI 1962915454

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-17.