Value explorer / OH

OH: the directory by county and ZIP

264,318
practitioners
35.0%
have a workplace
52,788
provider organizations
2,510
tax records (not added)
89
counties

The bar is the share with a workplace listed, not the number of practitioners. Ranking by headcount would just rank by population.

CountyPractitionersHas a workplaceProvider orgsTax recordsZIPs
+Franklin County41,81526.3%7,58727742
+Cuyahoga County41,15141.5%7,58227552
+Hamilton County28,21133.7%4,60321951
+Montgomery County15,19635.5%2,94511531
+Lucas County14,42330.2%2,6559824
+Summit County13,80441.7%2,63110832
+Stark County8,03328.1%1,6907327
+(county unknown)7,39759.1%188870
+Mahoning County6,26637.1%1,2977424
+Butler County5,09228.0%1,2255612
+Warren County3,33849.3%1,9525011
+Lorain County3,20527.0%7964614
+Fairfield County3,12639.9%5603110
+Allen County3,08639.0%6654610
+Greene County3,07221.0%5052512
+Lake County3,01519.6%738357
+Trumbull County2,96140.1%8025121
+Wayne County2,91635.6%2742514
+Richland County2,74614.3%5122512
+Athens County2,61127.6%20458
+Delaware County2,44647.4%8063410
+Ross County2,41913.9%312216
+Clark County2,40744.0%5282910
+Portage County2,29826.1%3822813
+Lawrence County2,00125.0%220127
+Clermont County1,96237.5%4973112
+Wood County1,91535.4%4272614
+Medina County1,88535.5%6513510
+Scioto County1,79645.8%401359
+Licking County1,65036.2%421259
+Geauga County1,64044.9%3072210
+Erie County1,52839.7%349146
+Ashtabula County1,51346.9%3252813
+Muskingum County1,34335.8%338209
+Washington County1,26940.4%284119
+Hancock County1,20633.0%253137
+Gallia County1,20458.1%10568
+Marion County1,14439.2%266175
+Pike County1,11657.0%10553
+Columbiana County1,02830.4%3951913
+Miami County99237.7%289197
+Jefferson County96629.8%3092115
+Tuscarawas County91330.3%2591910
+Belmont County89123.1%3122410
+Knox County87736.6%211136
+Ashland County81140.3%180136
+Guernsey County76550.7%148128
+Defiance County72142.7%144133
+Sandusky County62838.9%22466
+Pickaway County62336.3%157106
+Union County54841.1%133104
+Highland County50733.9%13974
+Seneca County49620.0%207177
+Huron County49635.5%16789
+Logan County47241.7%1491310
+Brown County46061.5%115118
+Clinton County41919.3%122116
+Darke County41937.9%144118
+Auglaize County41845.0%159136
+Madison County41237.9%133145
+Shelby County39233.7%14057
+Henry County39038.5%6856
+Mercer County38527.0%12377
+Coshocton County37344.8%16265
+Fulton County36630.3%13197
+Van Wert County36343.5%12284
+Jackson County36227.1%10164
+Crawford County34035.0%156154
+Adams County26333.5%10955
+Putnam County24324.3%7256
+Perry County24126.6%6548
+Ottawa County23527.2%98116
+Williams County23324.5%9698
+Fayette County23125.1%9882
+Champaign County20825.0%7156
+Hardin County20529.8%6476
+Preble County19334.2%96116
+Hocking County19219.8%5242
+Holmes County17254.1%8186
+Carroll County14868.9%7354
+Paulding County13863.0%5356
+Meigs County12510.4%2424
+Wyandot County11848.3%6663
+Morrow County11211.6%6164
+Morgan County6314.3%2322
+Noble County458.9%3022
+Monroe County4429.5%2834
+Harrison County3716.2%2235
+Vinton County3327.3%1903

By profession, statewide

ProfessionPractitionersHas a workplace
behavioral-health64,11723.6%
physician43,21174.8%
other-clinical40,17414.0%
advanced-practice29,21675.8%
rehab-therapy26,11016.3%
nursing16,12421.3%
pharmacy11,8807.0%
student8,35714.8%
dental8,16915.5%
eye-vision3,11449.6%
chiropractic2,71246.7%
agency2,11716.2%
dietary2,02821.4%
group1,96958.8%
no-taxonomy1,73516.1%
support1,36117.0%
podiatry1,00970.2%
facility51726.1%
emergency-medical13545.2%
supplier13120.6%
transport11839.0%
payer140.0%

Release 2026-10-07. Methodology 0.7.3-draft.

Counts come from the NDH bulk export at the release named above. Organizations are split by record type and never summed: roughly half the Organization file is `ein` tax records that carry an NPI and an address, so adding them to provider organizations roughly doubles the count. Practitioner geography uses the primary address; 14.85% of practitioners list addresses in more than one state and are counted only in the first. Counties are derived from the Census ZCTA-to-county relationship file, taking the county holding the largest share of a ZIP's population; ZIPs with no dominant county are grouped as unknown. Payer organizations carry no address at all and cannot appear in any geography. Profession categories here come from the directory's own Practitioner.qualification taxonomy, not from NPPES. H54 categorises the same practitioners against their NPPES taxonomy and lands 1 to 2 points different per profession as a result: PA physicians read 73.0% here and 74.3% there. Neither is wrong. This view describes what the directory says about itself, which is the right frame for a directory explorer; H54 asks how the directory compares to the federal registry.

Data as JSON: /api/v1/explorer/oh.json. Looking for one provider? Search by name or NPI.