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THOMAS GENE GROSS MD
NPI 1285636258
Pediatrics - Pediatric Hematology-Oncology in Phoenix, AZ

Active since August 10, 2005PECOS Enrolled
1919 E THOMAS RD, PHOENIX, AZ 85016(602) 933-1000 Get Directions Write a Review

NPPES record last updated: October 25, 2023. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Oct 25, 2023, Jun 15, 2020 (2 updates tracked since 2020).

About Thomas Gene Gross Md NPPES

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

THOMAS GENE GROSS MD (NPI 1285636258) is an individual pediatric hematology-oncology provider in Phoenix, Arizona, licensed in Arizona (71019) and active in the NPI registry since August 2005. He is enrolled in Medicare PECOS and maintains a secondary practice location in Aurora.

NPPES Registry Identity

NPI1285636258
Entity TypeIndividualMale
Primary Taxonomy2080P0207X
Provider Legal NameTHOMAS GENE GROSSCredential: MD
Location Address1919 E THOMAS RDPhoenix, AZ 85016-7710
Mailing Address2108 E Thomas Rd Ste 130Phoenix, AZ 85016-0008 · (602) 933-3124
Phone(602) 933-1000
Sole ProprietorNo
Enumeration DateAugust 10, 2005
Last NPPES UpdateOctober 25, 20232 updates tracked since enumeration
NPPES CertifiedOctober 25, 2023
✔ NPI 1285636258 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Pediatric Hematology-OncologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0207X
Licenses✔ Licensed in AZ · 71019✔ Licensed in OH · 35075261✔ Licensed in CO · DR.0064358
Definition
A pediatrician trained in the combination of pediatrics, hematology and oncology to recognize and manage pediatric blood disorders and cancerous diseases.
1919 E THOMAS RD, Phoenix, AZ 85016
Open in Google Maps ↗

Secondary Practice Location 1

Location 113123 E 16th AveAurora, CO 80045-7106 · Phone (720) 777-1234

Other Identifiers 1

Medicaid133198AZ

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Thomas Gene Gross 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.

Medicare Billing Reassignment

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

Phoenix Children's Hospital
Same address
Pediatrics
1919 E THOMAS RD
Phoenix, AZ 85016
  • Reassigned Medicare billing, Arizona enrollment
  • 1,416 clinicians in this Medicare group
NPI 1922112044 (602) 933-1000

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.

DR. TIMUR RAGHIB M.D.
Hospitalist
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (602) 933-0777
MRS. MARIA T ESCOBAR CSP, RD
Dietitian, Registered
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (480) 440-2787
DR. AHMAR HUSAIN MD
Anesthesiology (Pediatric Anesthesiology)
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (602) 933-4660
MRS. SOLEE R COWLEY LCSW
Social Worker (Clinical)
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (602) 933-0414
MR. SEAN PATRICK BRADY DO
Anesthesiology (Pediatric Anesthesiology)
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (602) 933-4660
PRIYA PRASHER M.D.
Pediatrics
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (602) 933-1900
DR. AMIT RAJARAM D.O.
Pediatrics
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (602) 933-0198
LAURA GARDNER HAMANT
Pediatrics (Pediatric Gastroenterology)
1919 E THOMAS RD
PHOENIX, AZ 85016
Maricopa County (602) 933-1000

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 Thomas Gross's NPI number?

The NPI number for Thomas Gross is 1285636258. It was assigned to this individual provider in the NPPES registry on August 10, 2005.

Where is Thomas Gross located?

Thomas Gross practices at 1919 E Thomas Rd, Phoenix, AZ 85016. The listed phone number is (602) 933-1000.

What is Thomas Gross's specialty?

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

Is Thomas Gross enrolled in Medicare?

Yes. Thomas Gross is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Thomas Gross's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Thomas Gross reassigns Medicare benefits to Phoenix Children's Hospital (Phoenix, AZ). 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 Thomas Gross'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 Thomas Gross was last updated on October 25, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.