Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark Robert Zonfrillo, MD

Pediatric Emergency Medicine (Emergency Medicine) Physician in Newton, MA · enumerated 2006.

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

National Provider Identifier

1235180852

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Registry record

Entity type Individual (Type 1)

Name Mark Robert Zonfrillo

Credential MD

Sex Male

Practice address 2014 Washington St, Newton, MA, 02462

Phone (617) 243-6000

Enumeration date May 16, 2006

Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

207PP0204X Pediatric Emergency Medicine (Emergency Medicine) Physician Allopathic & Osteopathic Physicians · License MD14967 (RI) Secondary

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License MD14967 (RI) Secondary

207PP0204X Pediatric Emergency Medicine (Emergency Medicine) Physician Allopathic & Osteopathic Physicians · License 1024725 (MA) Primary

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 043923 (CT) Secondary

2080P0204X Pediatric Emergency Medicine (Pediatrics) Physician Allopathic & Osteopathic Physicians · License MD14967 (RI) 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
1235180852	Medicaid	RI	-
U400222345	Other	RI	MEDICAR-NGS
110102928A	Medicaid	MA	-

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Mark Zonfrillo?

The National Provider Identifier (NPI) for Mark Zonfrillo is 1235180852, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mark Zonfrillo practice?

The practice location on file with NPPES is in Newton, MA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Jennifer Balukonis Nurse Practitioner · Newton, MA NPI 1144210261 Judy Yang Internal Medicine Physician · Newton, MA NPI 1205818721 David Wyler Internal Medicine Physician · Newton, MA NPI 1689657686 Tarik Alkasab Diagnostic Radiology Physician · Newton, MA NPI 1154305803 Mary Jane Estrada-Lyder Nurse Practitioner · Newton, MA NPI 1427033257 Teresa Cahill Body Imaging Physician · Newton Lower Falls, MA NPI 1417935214 Daniel Mcdonald Diagnostic Radiology Physician · Newton, MA NPI 1053399857 Joseph Ferrucci Diagnostic Radiology Physician · Newton, MA NPI 1831177617

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.