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Hematology & Oncology

Healthcare providers specializing in hematology & oncology

Below are providers registered under the 207RH0003X taxonomy in the official NPI Registry.

📊 Healthcare Market Snapshot for Hematology & Oncology

Total Providers14,223Active NPI records
Type Split
👤 Indiv:11,319
🏢 Org:2,904
Geographic Reach62States / Territories
Top StateCalifornia (1,591)

Top States for Hematology & Oncology

US states with the highest concentration of hematology & oncology providers

Top Cities for Hematology & Oncology

US cities with the highest concentration of hematology & oncology providers

RankCityStateProvider Count
#1New YorkNY350
#2SeattleWA229
#3HoustonTX200
#4BostonMA190
#5ChicagoIL182
#6PhiladelphiaPA169
#7Los AngelesCA155
#8MiamiFL129
#9JacksonvilleFL110
#10AtlantaGA109

Longest-Registered Hematology & Oncology Providers

Providers with the most years of registration history as hematology & oncology specialists

Kirby Smith, MD

Hematology & OncologyMemphis, TNRegistered since 2005

Matthew Brouns, M.D

Hematology & OncologyVancouver, WARegistered since 2005

Edward Chang, M.D

Hematology & OncologyTigard, ORRegistered since 2005

Thomas Bensinger, M.D

Hematology & OncologyGreenbelt, MDRegistered since 2005

Mark Dewolfe, M.D

Hematology & OncologyKansas City, MORegistered since 2005

Jesse Lee, MD

Hematology & OncologyGreenville, NCRegistered since 2005

Kevin Shannon, M.D

Hematology & OncologyFindlay, OHRegistered since 2005

Arvind Shah, M.D

Hematology & OncologyColumbus, OHRegistered since 2005

Jonathan Treisman, M. D

Hematology & OncologyFranklin, WIRegistered since 2005

Robert Veith, M.D

Hematology & OncologyNew Orleans, LARegistered since 2005

Recently Registered Hematology & Oncology Providers

Newly registered healthcare providers specializing in hematology & oncology

Lancaster General Health Community

Hematology & OncologyLancaster, PARegistered since 2026

Maryland Oncology Hematology, P.a.

Hematology & OncologyWashington, DCRegistered since 2026

Mahaf Corporation

Hematology & OncologyEvergreen Park, ILRegistered since 2026

Mackenzie Young

Hematology & OncologyKnoxville, TNRegistered since 2026

Lingzhi Hong, MD, PHD

Hematology & OncologyHouston, TXRegistered since 2026

Premier Hematology & Oncology Pllc

Hematology & OncologyDearborn, MIRegistered since 2026

Megan Stewart

Hematology & OncologyStony Brook, NYRegistered since 2026

Courtney Rasa, FNP-C

Hematology & OncologySlidell, LARegistered since 2026

Mitchell Elliott, MD

Hematology & OncologyNew Haven, CTRegistered since 2026

Naila Zahid

Hematology & OncologyRancho Mirage, CARegistered since 2026

About Hematology & Oncology Providers

A hematologist-oncologist is a medical physician who specializes in diagnosing, treating, and managing blood disorders and cancers. They treat conditions like leukemia, lymphoma, anemia, hemophilia, and solid tumors, administering therapies like chemotherapy, immunotherapy, and blood transfusions. These specialists earn an MD or DO, complete an internal medicine residency, and undergo a three-year fellowship training program in hematology and oncology. They coordinate complex oncology treatment plans, conducting research and clinical trials to improve patient outcomes.

Finding a hematologist-oncologist's NPI number is essential for processing oncology billing, writing chemotherapy prescriptions, and requesting insurance pre-authorizations for cancer treatments. Insurance providers require the oncologist's NPI on claims to pay for consultations and cancer therapies. The NPPES registry verifies the physician's active license, board certifications, and oncology taxonomy. Checking the NPI registry helps oncology centers manage billing and helps patients confirm that their specialist is registered.

Source: CMS NPPES Registry

Frequently Asked Questions about Hematology & Oncology

How many Hematology & Oncology providers are registered in the US?

There are currently 14,223 registered hematology & oncology providers in the United States, according to the official CMS NPI registry database.

Which state has the most Hematology & Oncology providers?

California has the highest concentration of hematology & oncology specialists, with 1,591 registered providers.

What is the oldest registered Hematology & Oncology provider?

The oldest registered hematology & oncology provider in the database is Kirby Smith, MD, who registered on 05/23/2005 with NPI number 1144223298.

How do I find a Hematology & Oncology near me?

You can find hematology & oncology providers near you by browsing our directory by state or city, or by using the search bar at the top of the page to filter by name and state.

What credentials do Hematology & Oncology providers typically have?

A hematologist-oncologist is a medical physician who specializes in diagnosing, treating, and managing blood disorders and cancers. They treat conditions like leukemia, lymphoma, anemia, hemophilia, and solid tumors, administering therapies like chemotherapy, immunotherapy, and blood transfusions. These specialists earn an MD or DO, complete an internal medicine residency, and undergo a three-year fellowship training program in hematology and oncology. They coordinate complex oncology treatment plans, conducting research and clinical trials to improve patient outcomes.

How do I verify a Hematology & Oncology's NPI number?

You can verify any Hematology & Oncology's NPI number by searching on NPILookup using their name or NPI number. All data is sourced directly from the official CMS NPPES registry.

What is the taxonomy code for Hematology & Oncology?

The primary taxonomy code for Hematology & Oncology is 207RH0003X.

Can Hematology & Oncology providers bill insurance?

Yes, Hematology & Oncology providers can bill health insurance. As licensed physicians, they must use their National Provider Identifier (NPI) number on all medical insurance claims, including private plans, Medicare, and Medicaid, to identify themselves as the rendering provider and ensure proper billing.