STEWARD MEDICAL GROUP, INC
NPI 1356654495
Specialist in Brighton, MA

Q: What is Steward Medical Group, Inc's NPI number?

The NPI number for Steward Medical Group, Inc is 1356654495. It was assigned to this organization in the NPPES registry on July 19, 2010. The provider is also known as Steward Physician Network - Radiology.

Q: What is Steward Medical Group, Inc's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Active since July 19, 2010

77 WARREN ST, BRIGHTON, MA 02135(615) 467-4158(615) 467-1267 Get Directions Write a Review

NPPES record last updated: July 17, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jun 30, 2025, Aug 13, 2020 (2 updates tracked since 2020).

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About Steward Medical Group, Inc NPPES

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

STEWARD MEDICAL GROUP, INC (NPI 1356654495) is a healthcare organization registered as a specialist in Brighton, Massachusetts and active in the NPI registry since July 2010. The organization lists Michael J Callum, Ceo Of Steward Physician Network, as its authorized official.

NPPES Registry Identity

NPI1356654495

Entity TypeOrganization

Primary Taxonomy174400000X

Legal Business NameSTEWARD MEDICAL GROUP, INC

Location Address77 WARREN STBrighton, MA 02135-3601

Mailing Address77 Warren StBrighton, MA 02135-3601 · (423) 362-9204

Phone(615) 467-4158

Fax(615) 467-1267

Organization SubpartYesParent: Steward Health Care System Llc

Authorized OfficialMichael J CallumCeo Of Steward Physician Network · (617) 779-6303

Enumeration DateJuly 19, 2010

Last NPPES UpdateJuly 17, 20252 updates tracked since enumeration

NPPES CertifiedJuly 17, 2025

✔ NPI 1356654495 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialistOther Service Providers

Taxonomy Code174400000X

Definition

An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.

77 WARREN ST, Brighton, MA 02135

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Other Names 1

Other NameSteward Physician Network - Radiology

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Blue Cross and Blue Shield of Louisiana, HMO Louisiana.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Steward Medical Group, Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

592

Medicare enrollment records show 592 clinicians reassign Medicare billing to Steward Medical Group, Inc, which bills Medicare for the services they deliver. Of these, 44 practice within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 42

Diagnostic Radiology136

Nurse Practitioner92

Internal Medicine66

Family Practice50

General Surgery29

Cardiovascular Disease (Cardiology)23

Gastroenterology19

Obstetrics/Gynecology16

34 other specialties161

Nearest to this location (20)

See all 592

Saad Hatahet, MD

Urology

NPI 1982180550

11 NEVINS ST STE 303
Brighton, MA 02135

(617) 562-7335

✔ PECOS0.2 mi

Allison Keel, M.D.

Diagnostic Radiology

NPI 1114142932

736 CAMBRIDGE ST
Brighton, MA 02135

(617) 789-2740

✔ PECOS✔ Accepts Medicare0.3 mi

Amin Chaoui, MD

Diagnostic Radiology

NPI 1093787483

736 CAMBRIDGE ST
Brighton, MA 02135

(617) 789-3000

✔ PECOS✔ Accepts Medicare0.3 mi

Dietrich Schultze, M.D.

Diagnostic Radiology

NPI 1922192459

736 CAMBRIDGE ST
Brighton, MA 02135

(617) 789-2762

✔ PECOS✔ Accepts Medicare0.3 mi

Elie Balesh, MD

Interventional Radiology

NPI 1528353299

736 CAMBRIDGE ST
Brighton, MA 02135

(617) 789-3000

✔ PECOS0.3 mi

Johng Chun, MD

Nuclear Medicine

NPI 1437144706

736 CAMBRIDGE ST
Brighton, MA 02135

(617) 789-2762

✔ PECOS✔ Accepts Medicare0.3 mi

Joseph Fonte, MD

Diagnostic Radiology

NPI 1497735229

736 CAMBRIDGE ST
Brighton, MA 02135

(617) 789-3000

✔ PECOS✔ Accepts Medicare0.3 mi

Timothy Frey, M.D.

Interventional Radiology

NPI 1053467969

736 CAMBRIDGE ST DEPARTMENT OF RADIOLOGY
Boston, MA 02135

(617) 789-2740

✔ PECOS✔ Accepts Medicare0.3 mi

Christina Konstantopoulos, MD

Diagnostic Radiology

NPI 1932639341

736 CAMBRIDGE ST
Brighton, MA 02135

(617) 789-3000

✔ PECOS✔ Accepts Medicare0.3 mi

David Lee, MD

Diagnostic Radiology

NPI 1811915143

736 CAMBRIDGE ST RADIOLOGY CMP 4
Boston, MA 02135

(617) 789-2746

✔ PECOS0.3 mi

Phoebe Lewit Olhava, M.D.

Diagnostic Radiology

NPI 1568414696

736 CAMBRIDGE ST
Boston, MA 02135

(617) 789-2792

✔ PECOS✔ Accepts Medicare0.3 mi

Michael Mastromatteo, MD

Diagnostic Radiology

NPI 1023002045

736 CAMBRIDGE ST
Brighton, MA 02135

(617) 789-2762

✔ PECOS✔ Accepts Medicare0.3 mi

Janneth Romero, M.D.

Diagnostic Radiology

NPI 1144410234

736 CAMBRIDGE ST
Brighton, MA 02135

(617) 789-2762

✔ PECOS✔ Accepts Medicare0.3 mi

Eric Schwartz, MD

Diagnostic Radiology

NPI 1528093580

736 CAMBRIDGE ST
Brighton, MA 02135

(617) 789-2762

✔ PECOS✔ Accepts Medicare0.3 mi

Eugene Tikh, M.D.

Diagnostic Radiology

NPI 1942460068

736 CAMBRIDGE ST
Brighton, MA 02135

(617) 789-3000

✔ PECOS✔ Accepts Medicare0.3 mi

Liang Zhang, M.D.

Diagnostic Radiology

NPI 1922369313

736 CAMBRIDGE ST
Brighton, MA 02135

(617) 789-3000

✔ PECOS✔ Accepts Medicare0.3 mi

Rebecca Schwartz, MD

Diagnostic Radiology

NPI 1679518526

736 CAMBRIDGE ST RADIOLOGY CMP 4
Boston, MA 02135

(617) 645-6657

✔ PECOS✔ Accepts Medicare0.3 mi

Marwan Moussa, M.D

Diagnostic Radiology

NPI 1245573096

1 DEACONESS RD BLDG 3
Boston, MA 02215

(617) 754-2523

✔ PECOS✔ Accepts Medicare1.9 mi

Maureen Frederick, M.D.

Diagnostic Radiology

NPI 1225457070

330 BROOKLINE AVE
Boston, MA 02215

(617) 667-7000

✔ PECOS✔ Accepts Medicare2.0 mi

Svetlana Kondratiev, MD

Pathology

NPI 1780852624

75 FRANCIS ST
Boston, MA 02115

(617) 732-5500

✔ PECOS✔ Accepts Medicare2.1 mi

See all 592 clinicians

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Steward Medical Group, Inc's NPI number?

The NPI number for Steward Medical Group, Inc is 1356654495. It was assigned to this organization in the NPPES registry on July 19, 2010. The provider is also known as Steward Physician Network - Radiology.

Where is Steward Medical Group, Inc located?

Steward Medical Group, Inc is located at 77 Warren St, Brighton, MA 02135. The listed phone number is (615) 467-4158.

What is Steward Medical Group, Inc's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Is Steward Medical Group, Inc enrolled in Medicare?

Yes. Steward Medical Group, Inc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Steward Medical Group, Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 592 clinicians in 42 Medicare specialties reassign their Medicare billing to Steward Medical Group, Inc. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. The largest specialties are Diagnostic Radiology (136), Nurse Practitioner (92) and Internal Medicine (66). Of these, 44 practice within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does Steward Medical Group, Inc accept?

Health plans from Anthem Blue Cross and Blue Shield, Blue Cross and Blue Shield of Louisiana and HMO Louisiana list Steward Medical Group, Inc as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Steward Medical Group, Inc was last updated on July 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.