Value explorer / OH

OH: the directory by county and ZIP

263,937
practitioners
32.5%
have a workplace
52,960
provider organizations
54,607
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 County40,26724.9%7,6338,34842
+Cuyahoga County39,90238.4%7,5647,72452
+Hamilton County27,51029.7%4,6714,68851
+Montgomery County14,87933.0%2,9642,88731
+Lucas County14,15327.1%2,6922,73724
+Summit County13,47237.1%2,6542,57732
+(county unknown)11,02166.8%22112769
+Stark County7,99924.5%1,6931,92027
+Mahoning County6,46934.6%1,3031,47024
+Butler County5,06421.4%1,2181,32412
+Warren County3,38944.4%1,91577811
+Greene County3,25920.9%50656412
+Allen County3,20435.6%68264810
+Lorain County3,16227.9%79485514
+Fairfield County3,01036.9%55162610
+Trumbull County2,91120.8%80595721
+Lake County2,86818.6%7377957
+Wayne County2,72930.0%27735114
+Richland County2,66913.2%51557912
+Athens County2,58811.2%1971888
+Clark County2,52845.6%53157610
+Portage County2,37718.7%37737513
+Ross County2,37012.1%3192936
+Delaware County2,31642.8%80595310
+Lawrence County1,99910.7%2191877
+Medina County1,94536.4%6516629
+Clermont County1,89036.0%49750011
+Wood County1,84831.5%42448714
+Scioto County1,82134.3%4034279
+Geauga County1,74443.0%31633810
+Ashtabula County1,68347.0%31736213
+Licking County1,67135.9%4254629
+Erie County1,52737.5%3473366
+Gallia County1,40357.5%1031128
+Pike County1,25852.9%1031013
+Muskingum County1,24829.0%3434019
+Marion County1,22443.4%2673065
+Hancock County1,21533.5%2533087
+Washington County1,18936.2%2822649
+Jefferson County1,03930.9%31238014
+Columbiana County97928.7%39643613
+Miami County93937.5%2793107
+Knox County91631.0%2112236
+Belmont County89920.9%31232910
+Ashland County88941.1%1782016
+Tuscarawas County86327.0%25430410
+Guernsey County77625.4%1461838
+Defiance County73742.1%1441413
+Pickaway County62214.5%1571816
+Sandusky County60134.1%2302516
+Highland County51231.8%1411514
+Union County50738.3%1341664
+Huron County49434.2%1621709
+Seneca County47918.6%2062257
+Brown County46718.0%1141128
+Logan County46439.2%15916810
+Auglaize County43847.9%1571946
+Henry County40738.6%66776
+Darke County40638.4%1441248
+Clinton County39715.9%1251636
+Coshocton County39144.5%1641595
+Van Wert County38546.0%1231394
+Shelby County37936.7%1391517
+Fulton County37731.3%1281497
+Jackson County37419.0%101894
+Mercer County36827.2%1151327
+Madison County35635.1%1351505
+Crawford County32532.9%1551754
+Adams County30336.3%108925
+Fayette County25032.8%991082
+Ottawa County24619.1%961086
+Putnam County24020.4%74886
+Perry County23916.7%62738
+Paulding County21768.7%53646
+Williams County20723.2%971028
+Carroll County19862.6%71744
+Champaign County18623.1%72726
+Hardin County18425.0%62696
+Preble County18420.1%991026
+Hocking County17814.0%52552
+Holmes County17554.9%81936
+Meigs County1278.7%25274
+Wyandot County12040.0%63583
+Morrow County1078.4%60604
+Morgan County596.8%24272
+Monroe County4320.9%29344
+Noble County4314.0%31302
+Harrison County3619.4%22235
+Vinton County2814.3%19223

By profession, statewide

ProfessionPractitionersHas a workplace
behavioral-health64,13016.9%
physician45,08575.4%
other-clinical38,8824.6%
advanced-practice27,40280.9%
rehab-therapy25,83114.6%
nursing16,88622.9%
pharmacy11,7464.5%
student10,13615.4%
dental8,25413.7%
eye-vision3,22452.2%
chiropractic2,79852.8%
agency2,0939.7%
dietary2,08622.1%
group1,88557.8%
support1,32511.2%
podiatry1,04372.6%
facility52617.3%
no-taxonomy1903.7%
emergency-medical16254.9%
supplier12515.2%
transport11435.1%
payer140.0%

Release 2026-08-20. 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.