Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

SUSAN MASTELLONE DO
NPI 1255379822
Emergency Medicine in Baltimore, MD

Active since June 03, 2006
3001 S HANOVER ST, BALTIMORE, MD 21225(410) 350-3509(410) 350-3511 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Susan Mastellone Do NPPES

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

SUSAN MASTELLONE DO (NPI 1255379822) is an individual emergency medicine provider in Baltimore, Maryland, licensed in Maryland (H55662) and active in the NPI registry since June 2006.

NPPES Registry Identity

NPI1255379822
Entity TypeIndividualFemale
Primary Taxonomy207P00000X
Provider Legal NameSUSAN MASTELLONECredential: DO
Location Address3001 S HANOVER STBaltimore, MD 21225-1233
Mailing Address12443 Petrillo DrHighland, MD 20777-9567 · (301) 854-2120
Fax(410) 350-3511
Sole ProprietorNo
Enumeration DateJune 3, 2006
Last NPPES UpdateJuly 13, 2026
NPI 1255379822 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License Licensed in MD · H55662
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.
3001 S HANOVER ST, Baltimore, MD 21225

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.

Radiology (Diagnostic Radiology)
3001 S HANOVER ST, DEPT OF INTERNAL MEDICINE
BALTIMORE, MD 21225
Internal Medicine (Cardiovascular Disease)
3001 S HANOVER ST
BALTIMORE, MD 21225
Internal Medicine (Cardiovascular Disease)
3001 S HANOVER ST, NATIONAL INSTITUTE ON AGING, 5TH FLOOR OF HARBOR HOSP.
BALTIMORE, MD 21225
Durable Medical Equipment & Medical Supplies (Customized Equipment)
3001 S HANOVER ST, GRUEHN BUILDING SUITE 100
BALTIMORE, MD 21225
Specialist
3001 S HANOVER ST
BALTIMORE, MD 21225
Obstetrics & Gynecology
3001 S HANOVER ST, SUITE 301
BALTIMORE, MD 21225
Emergency Medicine
3001 S HANOVER ST
BALTIMORE, MD 21225
Orthopaedic Surgery (Orthopaedic Surgery of the Spine)
3001 S HANOVER ST, GRUEHN BLDG, STE 502
BALTIMORE, MD 21225

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 Susan Mastellone's NPI number?

The NPI number for Susan Mastellone is 1255379822. It was assigned to this individual provider in the NPPES registry on June 3, 2006.

Where is Susan Mastellone located?

Susan Mastellone practices at 3001 S Hanover St, Baltimore, MD 21225. The listed phone number is (410) 350-3509.

What is Susan Mastellone's specialty?

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

When was this NPI record last updated?

The NPPES record for Susan Mastellone was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 24 days 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.