Antitrust Radar

Economy-wide observatory

U.S. industry concentration atlas

How concentrated each U.S. industry is, from broad sectors down to detailed lines of business, with each industry's sales, value of shipments, or revenue, and employment from the Census Bureau. Census categories are statistical groupings and are not necessarily antitrust markets.

899Detailed industriessix-digit NAICS679Published HHI220 withheld68Top decileHHI >= 1,081$50.3TRevenue represented2022 Census

Sector signal plane

Where sector medians sit in the Census universe

17 sectorscircle = detailed rowsOpen priority list
Sector median HHI and CR4 signal planeSeventeen Census sectors plotted by median detailed-industry HHI and median CR4, with screen, watch, and priority review HHI regions. Circle size represents the number of detailed industries. Each point links to the filtered industry atlas.Median detailed-industry HHIMedian CR4 (%)Mining, quarrying, and oil and gas extraction: median HHI 559.2; median CR4 43.7% across 21 detailed industries.21Utilities: median HHI 615.9; median CR4 41.6% across 14 detailed industries.22Construction: median HHI 19.4; median CR4 6.4% across 31 detailed industries.Manufacturing: median HHI 439.3; median CR4 38.5% across 346 detailed industries.Wholesale trade: median HHI 360.8; median CR4 29.9% across 69 detailed industries.Retail trade: median HHI 133.9; median CR4 32.8% across 57 detailed industries.Transportation and warehousing: median HHI 277.4; median CR4 40% across 54 detailed industries.Information: median HHI 638.2; median CR4 45.6% across 29 detailed industries.51Finance and insurance: median HHI 405.8; median CR4 31% across 29 detailed industries.Real estate and rental and leasing: median HHI 116.9; median CR4 29.4% across 24 detailed industries.Professional, scientific, and technical services: median HHI 94.9; median CR4 17.8% across 48 detailed industries.Administrative and support and waste management and remediation services: median HHI 182; median CR4 23.5% across 44 detailed industries.Educational services: median HHI 75.6; median CR4 15% across 14 detailed industries.Health care and social assistance: median HHI 35.8; median CR4 8.4% across 39 detailed industries.Arts, entertainment, and recreation: median HHI 192.2; median CR4 21.2% across 25 detailed industries.Accommodation and food services: median HHI 15; median CR4 8% across 15 detailed industries.Other services (except public administration): median HHI 54.3; median CR4 12.8% across 40 detailed industries.
Below 100100-299300-499500+
Priority review / NAICS 51Information
Median HHI638.2Median CR445.6%Sector rank1 / 17Top-decile industries4 / 29

13.8% of detailed industries in this sector fall in the national HHI top decile.

Open sector evidence

NAICS hierarchy navigator

Move through the official industry classification

Select any branch to carry its detailed-industry scope into the concentration plane, economy map, and evidence directory below.

Current branchHealth care and social assistanceSector / level 2 of 6
Detailed descendants39Six-digit records in scope
Published HHI76.9%30 published / 9 withheld
Revenue$3.3TExact Census hierarchy row

Direct subsector records

Health care and social assistance / bars normalized to the largest visible revenue value

Selected classification

NAICS 62

Health care and social assistance

Sector with 39 detailed descendants.

Median HHI
35.8
Revenue
$3.3T
Employment
21.8M
Employer firms
706.4K

Curated antitrust layer

Research coverage gap

Profile AtlasDataTrace 2017-2022

NAICS hierarchy is an economic classification, not a legal product or geographic market definition.

Economy concentration plane

See scale and concentration together

Revenue uses a logarithmic axis, circle area follows employer-firm count, and color identifies the two-digit NAICS sector.

Current scopeHealth care and social assistance39 detailed rows
Published HHI3076.9% of scope
Median HHI35.8Median CR4 8.4%
Revenue represented$3.3T9 HHI disclosure-withheld

Detailed-industry cross-section

30 published industries plotted by revenue, HHI, employer-firm count, and NAICS sector.

9 withheld
NAICS 621111: Offices of physicians (except mental health specialists); HHI 18.5; $630.2B revenue; 138,120 employer firmsNAICS 621210: Offices of dentists; HHI 5.5; $160.3B revenue; 121,011 employer firmsNAICS 624410: Child care services; HHI 22.5; $58.4B revenue; 63,487 employer firmsNAICS 621330: Offices of mental health practitioners (except physicians); HHI 6.6; $23.3B revenue; 39,395 employer firmsNAICS 624120: Services for the elderly and persons with disabilities; HHI 7.3; $77.3B revenue; 30,629 employer firmsNAICS 621399: Offices of all other miscellaneous health practitioners; HHI 85.4; $18.3B revenue; 29,775 employer firmsNAICS 621610: Home health care services; HHI 42.2; $114.2B revenue; 27,774 employer firmsNAICS 621320: Offices of optometrists; HHI 21.7; $20.1B revenue; 18,582 employer firmsNAICS 623312: Assisted living facilities for the elderly; HHI 86.7; $38.9B revenue; 14,674 employer firmsNAICS 621112: Offices of physicians, mental health specialists; HHI 16.2; $10.2B revenue; 11,973 employer firmsNAICS 624110: Child and youth services; HHI 11.7; $24.1B revenue; 11,047 employer firmsNAICS 623110: Nursing care facilities (skilled nursing facilities); HHI 21; $135.4B revenue; 10,663 employer firmsNAICS 621420: Outpatient mental health and substance abuse centers; HHI 9.2; $30.6B revenue; 9,647 employer firmsNAICS 621498: All other outpatient care centers; HHI 27.7; $69.6B revenue; 8,942 employer firmsNAICS 621999: All other miscellaneous ambulatory health care services; HHI 167.8; $25.4B revenue; 7,270 employer firmsNAICS 621391: Offices of podiatrists; HHI 11.1; $5.4B revenue; 6,546 employer firmsNAICS 621493: Freestanding ambulatory surgical and emergency centers; HHI 116.4; $44.1B revenue; 6,092 employer firmsNAICS 621512: Diagnostic imaging centers; HHI 76.1; $25B revenue; 4,717 employer firmsNAICS 623220: Residential mental health and substance abuse facilities; HHI 36.1; $21.4B revenue; 4,504 employer firmsNAICS 624310: Vocational rehabilitation services; HHI 35.5; $14.3B revenue; 3,895 employer firmsNAICS 624210: Community food services; HHI 37.9; $17.6B revenue; 3,864 employer firmsNAICS 623311: Continuing care retirement communities; HHI 35.5; $41.1B revenue; 3,694 employer firmsNAICS 624229: Other community housing services; HHI 58.4; $11.8B revenue; 3,556 employer firmsNAICS 624221: Temporary shelters; HHI 21.9; $8.8B revenue; 3,555 employer firmsNAICS 622110: General medical and surgical hospitals; HHI 37.6; $1.3T revenue; 2,280 employer firmsNAICS 621410: Family planning centers; HHI 90.7; $4.6B revenue; 1,671 employer firmsNAICS 624230: Emergency and other relief services; HHI 477.1; $15B revenue; 714 employer firmsNAICS 621991: Blood and organ banks; HHI 573.6; $19.9B revenue; 371 employer firmsNAICS 622310: Specialty (except psychiatric and substance abuse) hospitals; HHI 334.8; $58.4B revenue; 280 employer firmsNAICS 621491: HMO medical centers; HHI 2,449.2; $43.6B revenue; 56 employer firms

Selected record

HMO medical centers

NAICS 621491
HHI
2,449.2
Revenue
$43.6B
CR4
88.8%
Employer firms
56
Open industry profile

High-HHI tail

Highest measured rows

01HMO medical centersNAICS 621491 / $43.6B2,449.202Blood and organ banksNAICS 621991 / $19.9B573.603Emergency and other relief servicesNAICS 624230 / $15B477.104Specialty (except psychiatric and substance abuse) hospitalsNAICS 622310 / $58.4B334.805All other miscellaneous ambulatory health care servicesNAICS 621999 / $25.4B167.806Freestanding ambulatory surgical and emergency centersNAICS 621493 / $44.1B116.4

Circle position and rank use Census-published HHI only. Disclosure-withheld values remain in the directory and are excluded from measured comparisons.

Economy composition map

See where economic scale and concentration meet

Each tile is one six-digit NAICS industry. Area follows the selected economic measure; color carries either published HHI or sector identity.

Size tiles by
Color tiles by
Current scopeHealth care and social assistance39 detailed rows
Area / Revenue$3.3TSales, shipments, or revenue
Color / HHI bands30 published9 HHI disclosure-withheld
Scope median HHI35.8Unweighted across published rows

Area = revenue / Color = hhi bands

1 sector groups / 39 positive-value industries

2022 Economic Census
0-499500-9991,000-1,4991,500-2,4992,500+Withheld

Active industry

General medical and surgical hospitalsNAICS 622110

Revenue

$1.3T

38.13% of current scope / 38.1% of sector

HHI
37.6
CR4
8.4%
Employment
5,821,696
Employer firms
2,280
Open evidence profile

Largest by revenue

01General medical and surgical hospitals622110$1.3T02Offices of physicians (except mental health specialists)621111$630.2B03Offices of dentists621210$160.3B04Nursing care facilities (skilled nursing facilities)623110$135.4B

Tile area represents revenue within this detailed-industry scope. HHI is a national NAICS screen, not a legal antitrust market. Disclosure-withheld values remain mapped and use the gray band.

Census industry directory

Compare the full NAICS hierarchy

HHI and concentration ratios are based on national sales, value of shipments, or revenue for employer firms.

39 of 1,866
NAICS 621491HMO medical centersDetailed industry
HHI2,449.2CR488.8%Revenue$43.6B
NAICS 621991Blood and organ banksDetailed industry
HHI573.6CR441.5%Revenue$19.9B
NAICS 624230Emergency and other relief servicesDetailed industry
HHI477.1CR435.5%Revenue$15B
NAICS 622310Specialty (except psychiatric and substance abuse) hospitalsDetailed industry
HHI334.8CR428.6%Revenue$58.4B
NAICS 621999All other miscellaneous ambulatory health care servicesDetailed industry
HHI167.8CR421.4%Revenue$25.4B
NAICS 621493Freestanding ambulatory surgical and emergency centersDetailed industry
HHI116.4CR417.5%Revenue$44.1B
NAICS 621410Family planning centersDetailed industry
HHI90.7CR411.9%Revenue$4.6B
NAICS 623312Assisted living facilities for the elderlyDetailed industry
HHI86.7CR415.7%Revenue$38.9B
NAICS 621399Offices of all other miscellaneous health practitionersDetailed industry
HHI85.4CR415.8%Revenue$18.3B
NAICS 621512Diagnostic imaging centersDetailed industry
HHI76.1CR412.9%Revenue$25B
NAICS 624229Other community housing servicesDetailed industry
HHI58.4CR413.9%Revenue$11.8B
NAICS 621610Home health care servicesDetailed industry
HHI42.2CR49.1%Revenue$114.2B
NAICS 624210Community food servicesDetailed industry
HHI37.9CR46.1%Revenue$17.6B
NAICS 622110General medical and surgical hospitalsDetailed industry
HHI37.6CR48.4%Revenue$1.3T
NAICS 623220Residential mental health and substance abuse facilitiesDetailed industry
HHI36.1CR49.8%Revenue$21.4B
NAICS 623311Continuing care retirement communitiesDetailed industry
HHI35.5CR48%Revenue$41.1B
NAICS 624310Vocational rehabilitation servicesDetailed industry
HHI35.5CR48%Revenue$14.3B
NAICS 621498All other outpatient care centersDetailed industry
HHI27.7CR47.2%Revenue$69.6B
NAICS 624410Child care servicesDetailed industry
HHI22.5CR47.9%Revenue$58.4B
NAICS 624221Temporary sheltersDetailed industry
HHI21.9CR46%Revenue$8.8B
NAICS 621320Offices of optometristsDetailed industry
HHI21.7CR47.8%Revenue$20.1B
NAICS 623110Nursing care facilities (skilled nursing facilities)Detailed industry
HHI21CR46.8%Revenue$135.4B
NAICS 621111Offices of physicians (except mental health specialists)Detailed industry
HHI18.5CR46.2%Revenue$630.2B
NAICS 621112Offices of physicians, mental health specialistsDetailed industry
HHI16.2CR45.9%Revenue$10.2B
NAICS 624110Child and youth servicesDetailed industry
HHI11.7CR44%Revenue$24.1B

A NAICS industry is a statistical classification, not a legally defined antitrust market. Use these national revenue concentration measures to screen where deeper product and geographic market analysis may be warranted, not to infer market power or liability.

U.S. Industry Concentration Atlas | Antitrust Radar