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DR. KATHERINE ELIZABETH WARREN M.D.
NPI 1619279718
Pediatrics - Pediatric Hematology-Oncology in Boston, MA

Active since November 22, 2010PECOS Enrolled
450 BROOKLINE AVE, BOSTON, MA 02215(617) 632-3000(617) 632-3730 Get Directions Write a Review

NPPES record last updated: November 5, 2019. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Katherine Elizabeth Warren M.d. NPPES

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

DR. KATHERINE ELIZABETH WARREN M.D. (NPI 1619279718) is an individual pediatric hematology-oncology provider in Boston, Massachusetts, licensed in Massachusetts (280016) and active in the NPI registry since November 2010. She is enrolled in Medicare PECOS and maintains a secondary practice location in Boston.

NPPES Registry Identity

NPI1619279718
Entity TypeIndividualFemale
Primary Taxonomy2080P0207X
Provider Legal NameDR. KATHERINE ELIZABETH WARRENCredential: M.D.
Location Address450 BROOKLINE AVEBoston, MA 02215
Mailing Address450 Brookline AveBoston, MA 02215-5450 · (617) 632-4907 · Fax (617) 632-3730
Phone(617) 632-3000
Fax(617) 632-3730
Sole ProprietorNo
Enumeration DateNovember 22, 2010
Last NPPES UpdateNovember 5, 2019
✔ NPI 1619279718 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Pediatric Hematology-OncologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0207X
License✔ Licensed in MA · 280016
Definition
A pediatrician trained in the combination of pediatrics, hematology and oncology to recognize and manage pediatric blood disorders and cancerous diseases.
450 BROOKLINE AVE, Boston, MA 02215
Open in Google Maps ↗

Secondary Practice Location 1

Location 1450 Brookline AveBoston, MA 02215 · Phone (617) 632-3000 · Fax (617) 632-3730

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Taro Health.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Katherine Elizabeth Warren M.d. 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.

Medicare Billing Reassignment

Medicare enrollment records show Katherine Warren reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Children's Hospital Pediatric Associates, Inc
0.2 mi
Pediatrics
300 LONGWOOD AVE
Boston, MA 02115
  • Reassigned Medicare billing, Massachusetts enrollment
  • 1,358 clinicians in this Medicare group
NPI 1457306664 (617) 355-6000

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

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.

PRABHSIMRANJOT SINGH MD
Internal Medicine (Hematology & Oncology)
450 BROOKLINE AVE
BOSTON, MA 02215
Suffolk County (617) 582-7956
SHAWN MAGUIRE PA-C
Physician Assistant
450 BROOKLINE AVE
BOSTON, MA 02215
Suffolk County (617) 582-8487
KARINA FRANCA
Genetic Counselor, MS
450 BROOKLINE AVE
BOSTON, MA 02215
Suffolk County (857) 215-2285
DR. SUZANNE JAQUETH FORREST M.D.
Pediatrics (Pediatric Hematology-Oncology)
450 BROOKLINE AVE
BOSTON, MA 02215
Suffolk County (617) 632-3270
LAUREN KIRITSY MSW, LCSW
Counselor (Mental Health)
450 BROOKLINE AVE
BOSTON, MA 02215
Suffolk County (857) 215-3448
OFIR WOLAJ MD
Internal Medicine (Hematology & Oncology)
450 BROOKLINE AVE, DANA 2058
BOSTON, MA 02215
Suffolk County (617) 632-6139
JASON BATALHA AGPCNP-BC
Nurse Practitioner
450 BROOKLINE AVE
BOSTON, MA 02215
Suffolk County (617) 632-6140
FATIMA EMRAN AMIR MS, LGC
Genetic Counselor, MS
450 BROOKLINE AVE
BOSTON, MA 02215
Suffolk County (617) 632-3729

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 Katherine Warren's NPI number?

The NPI number for Katherine Warren is 1619279718. It was assigned to this individual provider in the NPPES registry on November 22, 2010.

Where is Katherine Warren located?

Katherine Warren practices at 450 Brookline Ave, Boston, MA 02215. The listed phone number is (617) 632-3000.

What is Katherine Warren's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Hematology-Oncology, with taxonomy code 2080P0207X.

Is Katherine Warren enrolled in Medicare?

Yes. Katherine Warren is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Katherine Warren's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Katherine Warren reassigns Medicare benefits to Children's Hospital Pediatric Associates, Inc (Boston, MA). The 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 Katherine Warren's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Katherine Warren accept?

Health plans from Taro Health list Katherine Warren 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 Katherine Warren was last updated on November 5, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years 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.