List of Oncologists in the USA

Name: List of Oncologists in the USA
Creator: CompanyData

Last updated 21 October 2026

There are 6,903 oncologists in the USA, one in every 9,252 US companies. Most of them are small: half have one to four people, and only 354 firms employ 50 people or more. One in seventeen oncology practices is based in New York, Houston, Jacksonville, Dallas and San Antonio. Below you find the largest oncology practices in the USA, the cities where they cluster, how many started this year and which are the oldest. The full list with addresses, phone numbers and email is in our US company database or through the Company Data API.

6,903 companies indexed · Data counted on 21 October 2026

Companies6,9031 in9,252 US companiesCities1,668Largest cityNew York 104Sole traders5%Employees1-4 (51%)Revenue$100-500K (60%)Email52%Phone100%Website96%

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A live sample of the list

A live view of all 6,903 oncology practices, sorted by revenue. Narrow it by region, city, employee size, revenue, legal form or founding year, or search a firm by name.

Commonspirit HealthCommonspirit Health

	Company Name	Country	City	Address 1	State/Province	Postal Code	Website	Founding Year	Yearly Revenue in U.S. Dollars	Employees Total	Business Legal Type - Description	Number of Companies in Group	Company Registration Number
1	Commonspirit Health	USA	Chicago	444 W Lake St Ste 2500	Cook	60606-0097	*****.org	1979	$39,116,000,000	72,500	Corporation	1012	19871380804
2	Florida Health Sciences Center, INC.	USA	Tampa	1 Tampa General Cir	Hillsborough	33606-3571	*****.org	1997	$4,142,430,338	8,000	Corporation	13	N97000003941
3	Arthur G. James Cancer Hospital And Richard J. Solove Research Institute Foundation	USA	Columbus	460 W 10th Ave	Franklin	43210-1240	*****.edu	1985	$2,533,176,995	35	Corporation	2531	496220
4	Trinity Health Of New England CORPORATION, INC.	USA	Hartford	1000 Asylum Ave Fl 5	Ct	06105	*****.org	1997	$2,048,095,000	13,000	Corporation	866	0568101
5	Gundersen Lutheran Administrative Services INC.	USA	La Crosse	1900 South Ave	La Crosse	54601	*****.org	2010	$1,171,831,507	6,000	Corporation	103	L 024552
6	Tenet Health Systems Norris, INC	USA	Los Angeles	1441 Eastlake Ave	Los Angeles	90033	*****.edu	1982	$605,265,091	352	Corporation	N/A	N/A
7	Smdc Medical Center	USA	Duluth	502 E 2nd St	St. Louis	55805-1913	*****.org	2001	$591,354,666	2,321	Corporation	132	1P-897 -DNP
8	21st Century Oncology Investments, LLC	USA	Cape Coral	1419 Se 8th Ter	Lee	33990-3213	*****.com	2020	$490,882,732	4,630	Corporation	337	4430971
9	Florida Cancer Specialists & Research Institute, LLC	USA	Fort Myers	4371 Veronica S Shoemaker Blvd	Lee	33916	*****.com	1998	$468,120,375	4,200	Corporation	81	L98000000430
10	Genesiscare USA, INC.	USA	Cape Coral	1419 Se 8th Ter Ste 200	Lee	33990-3213	*****.com	1997	$445,766,187	1,250	Corporation	337	P97000033926
11	Lutheran Medical Center	USA	Golden	400 Indiana St Ste 220	Jefferson	80401-5046	*****.org	1988	$402,262,629	2,100	Corporation	2	N/A
12	Henry Ford Health Genesys Hospital	USA	Grand Blanc	1 Genesys Pkwy	Genesee	48439	*****.com	2024	$388,243,218	3,739	Corporation	312	800799749
13	Christus Health Northern Louisiana	USA	Shreveport	1453 E Bert Kouns Industrial Loop	Caddo	71105-6800	*****.org	1998	$366,092,739	1,900	Corporation	320	04502480N
14	New York-Presbyterian Fund INC	USA	New York	525 E 68th St	New York	10065-4870	*****.org	2010	$334,790,100	14	Corporation	N/A	807091
15	Mary Bird Perkins Cancer Center	USA	Baton Rouge	6955 Perkins Rd	East Baton Rouge	70808-4267	*****.org	1968	$318,045,658	300	Corporation	6	03809550N
16	Midwestern Regional Medical Center, LLC	USA	Zion	2520 Elisha Ave	Lake	60099-2587	*****.com	1975	$234,396,818	1,021	Corporation	55	50587215
17	West Penn Allegheny Health System, INC.	USA	Pittsburgh	4800 Friendship Ave	Allegheny	15224	*****.org	2012	$181,055,298	13,000	Corporation	255	0002907909
18	The Medical Center Of Southeast Texas L P	USA	Port Arthur	2555 Jimmy Johnson Blvd	Jefferson	77640	*****.org	2024	$142,010,949	765	Corporation	4	0023509001
19	Island Public Hospital District	USA	Coupeville	101 N Main St	Island	98239-3413	*****.com	1980	$127,862,290	106	Corporation	N/A	N/A
20	Intermountain Foundation - Park City Hospital	USA	Park City	900 Round Valley Dr Ste 1	Summit	84060-7552	*****.org	2017	$118,458,902	8		N/A	N/A
21	Miami Cancer Institute At Baptist Health, INC.	USA	Coral Gables	6855 Sw 57th Ave	Miami-dade	33143-3647	*****.net	2016	$112,935,556	2	Corporation	N/A	N15000000397
22	P C Rpci Oncology	USA	Buffalo	Elm & Carlton St	Erie	14263	*****.org	2012	$102,064,282	23	Corporation	2	4286394
23	National Marrow Donor Program INC	USA	Minneapolis	500 N 5th St	Hennepin	55401-1206	*****.org	1981	$98,067,111	975	Corporation	6	840865803
24	The Institute For Cancer Research	USA	Philadelphia	333 Cottman Ave	Philadelphia	19111	*****.org	1972	$94,545,853	1	Corporation	175	236296135
25	City Of Hastings, Nebraska	USA	Hastings	2727 W 2nd St	Adams	68901-4684	*****.com	1872	$87,206,026	225	Corporation	14	476006221

Showing 25 of 6,903 companies

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Where in the USA?

New York has the most oncologists in the USA (104), ahead of Houston (98), Jacksonville (69), Dallas (68) and San Antonio (58). Together the five hold one in seventeen of them.

Cities by number of firms

1,668 US cities have at least one oncology practice; 147 have ten or more; 650 have exactly one. Click a city to set the lens.

By county 783 counties

County	Firms	%
Los Angeles	228	3%
Orange	131	2%
Maricopa	122	2%
Harris	119	2%
New York	104	2%
Dallas	102	1%
Palm Beach	95	1%
Jefferson	94	1%
Montgomery	93	1%
Cook	78	1%

Show all 783

How many oncologists are there in the USA?

Oncologists and oncology practices in the USA

6,903

21 October 2026

There are 6,903 oncologists and oncology practices in the USA in our data (21 October 2026). That is one in every 9,252 US companies. About one new firm is entered in the register every month this year (13 so far in 2026).

Structure

Single-site firms: 5,166 75%
Head offices: 284
Branch offices: 1,453

Classification

Our platform counts them on the CompanyData industry label 011108.

1,812 of the 6,903 are corporations and LLCs (26%); 346 are sole traders. They come from the state business registers and our US register data, through the Company Data API.

Oncology practices in New York

New York has 104 oncologists and oncology practices, <0.1% of all 732,093 New York companies and 31% above the national share. Three in five New York firms have fewer than five people; 13 have 50 or more. 0 new firms were entered in 2026, 9 date from before 1990.

Size

1-4 staff: 59 · 57%
5-9: 20 · 19%
10-19: 8 · 8%
20-49: 4 · 4%
50+: 13 · 13%

Legal form

Sole traders: 12 · 12%
Partnerships: 2 · 2%
Corporations and LLCs: 24 · 23%
Other or none: 66 · 63%

Of the US total: 1.5%
Of all New York companies: <0.1%
Against the national share: 1.3×

New

Entered 2026 so far: 0
Entered 2025: 0
Of USA's 2026 entries: 0.0%

Old

Before 1990: 9 · 9%
1990 or later: 95 · 91%
Of USA's pre-1990 firms: 1.9%

Reachable

Email: 46 · 44%
Phone: 104 · 100%
Website: 96 · 92%

Revenue (USD)

Under $100K: 19 · 22%
$100K-$500K: 51 · 60%
$500K-$1M: 8 · 9%
$1M and more: 7 · 8%

Largest

12,647
2439
3217
492
529

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Firm sizes in the USA

Of the 6,887 US oncology practices with a known headcount, 3,512 (51%) have one to four people, 1,908 have five to nine, 1,113 have ten to 49 and 354 have 50 or more. Most firms turn over between $100,000 and $500,000 a year (3,271, 60%).

EU size bands · the grey line shows all US companies

Micro under 105,420 79%
Small 10 to 491,113 16%
Medium 50 to 249313 5%
Large 250+41 0.6%

Grey line: the share among all US companies (96% have under ten staff).

146

firms turn over more than $5 million a year; 94 more than $10 million.

firms were entered in 2026.

Largest oncology practices in the USA

The biggest firms by staff and by revenue, the largest in New York, the biggest newcomers of 2026 and the oldest firms. Click a name for the record.

Commonspirit Health is the largest oncology practice in the USA by headcount. 354 firms employ 50 people or more; 173 employ 100 or more.

1Chicago72,500 staff
2Hartford13,000 staff
3Pittsburgh13,000 staff
4Lancaster9,950 staff
5Tampa8,000 staff
6La Crosse6,000 staff
7Poughkeepsie5,032 staff
8Palo Alto4,895 staff
9Quincy4,700 staff
10Kirkland4,000 staff

By employee size · 6,887 firms with a known headcount

Employees	Firms	%
1-4	3,512	51%
5-9	1,908	28%
10-19	670	10%
20-49	443	6%
50-99	181	3%
100-199	82	1%
200-499	50	0.7%
500-999	18	0.3%
1,000+	23	0.3%

51% have 1 to 4 people; 443 have 20 to 49; 354 have 50 or more.

By yearly revenue (USD)

Revenue	Firms	%
< $100K	1,145	21%
$100K-$500K	3,271	60%
$500K-$1M	480	9%
$1M-$5M	392	7%
$5M-$10M	52	1.0%
$10M-$50M	65	1%
$50M-$100M	7	0.1%
$100M-$500M	15	0.3%
$500M+	7	0.1%

60% between $100,000 and $500,000; 392 between $1M and $5M; 146 above $5M.

How they compare

Next to related industries

There are 108 doctors for every oncology practice in the USA.

Industry	Firms	Website	1-4 staff
Doctors	743,325	56%	69%
Home Care Providers	216,193	28%	79%
Physiotherapists	26,510	96%	67%
Oncologists	6,903	96%	51%
Maxillofacial Surgeons	6,555	97%	53%
Nephrologists	2,343	93%	63%

Free sample: oncology practices in North America

How reachable are they?

Oncology practices are easier to reach than the average US company: 100% list a phone number and 96% a website.

Email3,616 52%
Phone6,891 100%
Website6,630 96%

Grey line: all US companies (email 15%, phone 42%, website 24%).

The full list with these fields is in our US company database.

Sole traders or corporations: how they are organised

One in twenty US oncology practices work as sole traders, against 5% of all US companies. Only one firm in four is a corporations or LLCs.

Sole traders3465%
Partnerships1162%
Corporations and LLCs1,81226%
No form on record or other4,62967%

Single-site: 75%
Head offices: 284
Branches: 1,453

All US companies: 5% sole traders, 1% partnerships, 68% corporations and LLCs.

The oldest firms in the USA

Our data holds 3 US oncology practices from before 1900, 14 from before 1950 and 479 from before 1990.

1872
1. Hastings
1873
1. Quincy
1887
1. Bradford
1900
1. Mount Pleasant
1919
1. Delta
1929
1. Birmingham

Older than you

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1990

479

US oncology practices date from before 1990

were entered in 1990

Frequently asked questions

How many oncologists are there in the USA?

There are 6,903 oncologists and oncology practices in the USA in our data, counted on 21 October 2026. That is one in every 9,252 US companies.

Which is the largest oncology practice in the USA?

Commonspirit Health in Chicago, with 72,500 staff.

Which US city has the most oncologists?

New York, with 104, ahead of Houston (98), Jacksonville (69), Dallas (68) and San Antonio (58).

How many oncology practices are there in New York?

104, which is <0.1% of all 732,093 New York companies and 31% above the national share.

How big is a typical oncology practice?

Small. 51% of the 6,887 firms with a known headcount have one to four people; 354 have 50 or more. Most turn over between $100,000 and $500,000 a year.

Are US oncologists sole traders or companies?

One in twenty (346) are sole traders, 2% are partnerships and 26% (1,812) are corporations and LLCs.

How many oncology practices started in 2026?

13 were entered in the US register so far in 2026, after 24 in 2025. 10 of them are corporations and LLCs.

What is the oldest oncology practice in the USA?

City of Hastings, Nebraska in Hastings, 1872, followed by Blessing Hospital in Quincy (1873) and Bradford Hospital in Bradford (1887). 3 firms date from before 1900.

Which industry code covers oncologists?

Our platform counts them on the CompanyData industry label 011108.

Can I download the full list?

Yes. All 6,903 firms with address, phone, email, legal form, employees, revenue and founding year, as Excel, CSV or through the API.

Discover more: related industries, by city

The lists closest to this one. Every industry and city in the USA is on the USA page.

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Companies in US cities

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