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

DR. GERALD ROSS MARX MD
NPI 1063403384
Pediatrics - Pediatric Cardiology in Boston, MA

Q: What is Gerald Marx's NPI number?

The NPI number for Gerald Marx is 1063403384. It was assigned to this individual provider in the NPPES registry on November 4, 2005.

Q: What is Gerald Marx's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Cardiology, with taxonomy code 2080P0202X.

Q: When was this NPI record last updated?

The NPPES record for Gerald Marx was last updated on June 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 52 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.

Active since November 04, 2005PECOS Enrolled

300 LONGWOOD AVE, BOSTON, MA 02115(617) 355-0039 Get Directions Write a Review

NPPES record last updated: June 29, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

On this page

About Dr. Gerald Ross Marx Md NPPES

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

DR. GERALD ROSS MARX MD (NPI 1063403384) is an individual pediatric cardiology provider in Boston, Massachusetts, licensed in Texas (W7367) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1063403384

Entity TypeIndividualMale

Primary Taxonomy2080P0202X

Provider Legal NameDR. GERALD ROSS MARXCredential: MD

Location Address300 LONGWOOD AVEBoston, MA 02115-5724

Mailing AddressPo Box 9135, Att:sharon SilvaBrookline, MA 02446-9135 · (800) 927-0002

Phone(617) 355-0039

Sole ProprietorNo

Enumeration DateNovember 4, 2005

Last NPPES UpdateJune 29, 2026

NPPES CertifiedJune 29, 2026

✔ NPI 1063403384 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Pediatric CardiologyAllopathic & Osteopathic Physicians

Taxonomy Code2080P0202X

Licenses✔ Licensed in TX · W7367✔ Licensed in MA · 60399

Definition

A pediatric cardiologist provides comprehensive care to patients with cardiovascular problems. This specialist is skilled in selecting, performing and evaluating the structural and functional assessment of the heart and blood vessels, and the clinical evaluation of cardiovascular disease.

300 LONGWOOD AVE, Boston, MA 02115

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Other Identifiers 2

Medicaid3038831MA

MedicaidGM27010RI

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Gerald Ross Marx Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

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.

JULIE ANN HANSEN LCSW

Social Worker (Clinical)

300 LONGWOOD AVE
BOSTON, MA 02115

Suffolk County (857) 218-4309

MS. ANNA ROGLIERI

Nurse Practitioner (Psychiatric/Mental Health)

300 LONGWOOD AVE
BOSTON, MA 02115

Suffolk County (617) 355-6000

STEPHEN G. FLYNN M.D.

Anesthesiology (Pediatric Anesthesiology)

300 LONGWOOD AVE
BOSTON, MA 02115

Suffolk County (617) 355-6000

MRS. LAUREN ASHLEY SHARIS P.T., D.P.T

Physical Therapist

300 LONGWOOD AVE
BOSTON, MA 02115

Suffolk County (617) 355-7216

MS. SOYUN KWAN LICSW

Social Worker (Clinical)

300 LONGWOOD AVE, CHILDREN'S HOSPITAL BOSTON
BOSTON, MA 02115

Suffolk County (617) 355-0567

PUJA BANKA M.D.

Pediatrics

300 LONGWOOD AVE, BADER 203
BOSTON, MA 02115

Suffolk County (617) 355-6363

MR. COURTNEY SULLIVAN FRATTO CPNP

Nurse Practitioner (Pediatrics)

300 LONGWOOD AVE, HUNNEWELL BUILDING 322
BOSTON, MA 02115

Suffolk County (857) 218-4085

DR. ELIZABETH S TAGLAUER M.D., PH.D.

Pediatrics (Neonatal-Perinatal Medicine)

300 LONGWOOD AVE
BOSTON, MA 02115

Suffolk County (617) 355-6000

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 Gerald Marx's NPI number?

The NPI number for Gerald Marx is 1063403384. It was assigned to this individual provider in the NPPES registry on November 4, 2005.

Where is Gerald Marx located?

Gerald Marx practices at 300 Longwood Ave, Boston, MA 02115. The listed phone number is (617) 355-0039.

What is Gerald Marx's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Cardiology, with taxonomy code 2080P0202X.

Is Gerald Marx enrolled in Medicare?

Yes. Gerald Marx is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Gerald Marx was last updated on June 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 52 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.