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MARIO JOSE CASTELLANOS MD
NPI 1164050910
Emergency Medicine in Boston, MA

Active since March 28, 2020PECOS EnrolledAccepts Medicare Assignment
75 FRANCIS ST, BOSTON, MA 02115(617) 732-5500 Get Directions Write a Review

NPPES record last updated: June 23, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jun 23, 2025, Jun 22, 2021, Jun 9, 2021 and 3 more (6 updates tracked since 2020).

About Mario Jose Castellanos Md NPPES

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

MARIO JOSE CASTELLANOS MD (NPI 1164050910) is an individual emergency medicine provider in Boston, Massachusetts, licensed in Massachusetts (289097) and active in the NPI registry since March 2020. He is enrolled in Medicare PECOS, is affiliated with Faulkner Hospital-brigham And Women's, and maintains a secondary practice location in Boston.

NPPES Registry Identity

NPI1164050910
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameMARIO JOSE CASTELLANOSCredential: MD
Location Address75 FRANCIS STBoston, MA 02115-6110
Mailing Address55 Fruit StBoston, MA 02114-2621
Phone(617) 732-5500
Sole ProprietorNo
Medical School CMSMedical College Of WisconsinGraduated 2021
Enumeration DateMarch 28, 2020
Last NPPES UpdateJune 23, 20256 updates tracked since enumeration
NPPES CertifiedJune 23, 2025
✔ NPI 1164050910 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in MA · 289097
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.
75 FRANCIS ST, Boston, MA 02115
Open in Google Maps ↗

Secondary Practice Location 1

Location 155 Fruit StBoston, MA 02114-2621 · Phone (617) 726-2000

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mario Jose Castellanos Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID547779019
PECOS Enrollment IDI20250605000149
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.

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Faulkner Hospital-Brigham And Women's

Acute Care Hospitals · Boston, MA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220119
Location1153 Centre StreetBoston, MA 02130 · Suffolk County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02115 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
$97.64 typical visit price
range $63.72 – $189.86
Typical copayment $24.41 (range $15.93 – $47.46)
Most-billed visit code 99203
Established Patient
$111.18 typical visit price
range $21.07 – $155.29
Typical copayment $27.79 (range $5.26 – $38.82)
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.

RUMA RAJBHANDARI
Internal Medicine (Gastroenterology)
75 FRANCIS ST
BOSTON, MA 02115
Suffolk County (617) 525-6841
WENYA LINDA BI
Neurological Surgery
75 FRANCIS ST
BOSTON, MA 02115
Suffolk County (203) 645-9485
CHI YUEN CHAN M.D.
Student in an Organized Health Care Education/Training Program
75 FRANCIS ST
BOSTON, MA 02115
Suffolk County (617) 732-5500
JENNIFER MICHELLE THOMAS MD
Radiology (Diagnostic Radiology)
75 FRANCIS ST, DEPARTMENT OF RADIOLOGY
BOSTON, MA 02115
Suffolk County (617) 732-6248
GAURAV SHARMA M.D.
Surgery (Vascular Surgery)
75 FRANCIS ST, BRIGHAM AND WOMEN'S HOSPITAL
BOSTON, MA 02115
Suffolk County (951) 259-0890
DR. EUGENE RICHARDSON MD
Internal Medicine (Infectious Disease)
75 FRANCIS ST
BOSTON, MA 02115
Suffolk County (617) 732-8881
YEU-SHIN CINDY CHANG M.D., M.P.H.
Emergency Medicine
75 FRANCIS ST, BWH DEPT. OF EMERGENCY MEDICINE
BOSTON, MA 02115
Suffolk County (617) 732-8070
CARA L RICHARDS
Physician Assistant
75 FRANCIS ST
BOSTON, MA 02115
Suffolk County (617) 732-5500

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 Mario Castellanos's NPI number?

The NPI number for Mario Castellanos is 1164050910. It was assigned to this individual provider in the NPPES registry on March 28, 2020.

Where is Mario Castellanos located?

Mario Castellanos practices at 75 Francis St, Boston, MA 02115. The listed phone number is (617) 732-5500.

What is Mario Castellanos's specialty?

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

Is Mario Castellanos enrolled in Medicare?

Yes. Mario Castellanos is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Is Mario Castellanos affiliated with any hospitals?

According to CMS data, Mario Castellanos is affiliated with Faulkner Hospital-Brigham And Women's.

When was this NPI record last updated?

The NPPES record for Mario Castellanos was last updated on June 23, 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.