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DIANNA HARDATT M.D.
NPI 1295268738
Pediatrics - Pediatric Hematology-Oncology in Bronx, NY

Active since April 11, 2017PECOS Enrolled
1650 GRAND CONCOURSE, BRONX, NY 10457(718) 992-7669 Get Directions Write a Review

NPPES record last updated: November 19, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Nov 19, 2025, Aug 6, 2020, Apr 11, 2017 (3 updates tracked since 2017).

About Dianna Hardatt M.d. NPPES

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

DIANNA HARDATT M.D. (NPI 1295268738) is an individual pediatric hematology-oncology provider in Bronx, New York, licensed in New York (307544) and active in the NPI registry since April 2017. She is enrolled in Medicare PECOS and is a graduate of Other (2016).

NPPES Registry Identity

NPI1295268738
Entity TypeIndividualFemale
Primary Taxonomy2080P0207X
Provider Legal NameDIANNA HARDATTCredential: M.D.
Location Address1650 GRAND CONCOURSEBronx, NY 10457-7679
Mailing Address1650 Grand ConcourseBronx, NY 10457-7679 · (718) 992-7669
Phone(718) 992-7669
Sole ProprietorYes
Medical School CMSOtherGraduated 2016
Enumeration DateApril 11, 2017
Last NPPES UpdateNovember 19, 20253 updates tracked since enumeration
NPPES CertifiedNovember 19, 2025
✔ NPI 1295268738 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatrics · Pediatric Hematology-OncologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0207X
License✔ Licensed in NY · 307544
Definition
A pediatrician trained in the combination of pediatrics, hematology and oncology to recognize and manage pediatric blood disorders and cancerous diseases.
Also ListedPediatricsTaxonomy 208000000X · License 307544 (NY)
1650 GRAND CONCOURSE, Bronx, NY 10457
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dianna Hardatt M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID2961995774
PECOS Enrollment IDI20251201002700
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 Dianna Hardatt reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Bronxcare Health System
Same address
Pediatrics
1650 GRAND CONCOURSE
Bronx, NY 10457
  • Reassigned Medicare billing, New York enrollment
  • 795 clinicians in this Medicare group
NPI 1073858296 (718) 901-8918

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.

CASSIE LAUREN GREEN M.S., CCC-SLP
Speech-Language Pathologist
1650 GRAND CONCOURSE
BRONX, NY 10457
Bronx County (201) 281-3781
ARAMARK
Clinic/Center
1650 GRAND CONCOURSE
BRONX, NY 10457
Bronx County (646) 641-7427
MAY YEE HELMAN M.D.
Emergency Medicine
1650 GRAND CONCOURSE
BRONX, NY 10457
Bronx County (718) 992-7669
ANDREA ELIZABETH SPIEKHOUT D.O.
Family Medicine
1650 GRAND CONCOURSE
BRONX, NY 10457
Bronx County (718) 992-7669
VINCENT SETIAWAN PRAWOKO MD
Student in an Organized Health Care Education/Training Program
1650 GRAND CONCOURSE
BRONX, NY 10457
Bronx County (347) 601-1241
HAIDER GHAZANFAR
Internal Medicine (Gastroenterology)
1650 GRAND CONCOURSE
BRONX, NY 10457
Bronx County (917) 856-6383
MATTHEW PEACHEY MD
Internal Medicine
1650 GRAND CONCOURSE
BRONX, NY 10457
Bronx County (718) 992-7669
TRACY RAU MD
Family Medicine
1650 GRAND CONCOURSE
BRONX, NY 10457
Bronx County (718) 590-1800

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 Dianna Hardatt's NPI number?

The NPI number for Dianna Hardatt is 1295268738. It was assigned to this individual provider in the NPPES registry on April 11, 2017.

Where is Dianna Hardatt located?

Dianna Hardatt practices at 1650 Grand Concourse, Bronx, NY 10457. The listed phone number is (718) 992-7669.

What is Dianna Hardatt's specialty?

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

Is Dianna Hardatt enrolled in Medicare?

Yes. Dianna Hardatt is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Dianna Hardatt's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Dianna Hardatt reassigns Medicare benefits to Bronxcare Health System (Bronx, NY). 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 Dianna Hardatt's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Dianna Hardatt was last updated on November 19, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.