We don’t sell ranking and don’t accept payment to move a provider up the list. For final hire decisions, verify licensing, insurance, and references directly with the applicable licensing or credentialing body.
No bulk-licensing source family is currently ingested for this vertical. Hire-time checking still routes through the body named above.
31 open-access studies across four editorial desks. Every study cites its source, snapshot date, and limitations. Datasets downloadable. Free to cite with attribution.
OwnListed analysis is clearly distinguished from the source datasets we cite. CMS ratings appear as CMS ratings; OwnListed counts appear as OwnListed counts.
All numbers below describe the OwnListed indexed provider dataset — the businesses we have cataloged across the network — not a U.S. market estimate.
Featured · May 6, 2026
Active U.S. chiropractors per 100,000 residents, by state, from the public CMS NPI Registry. Backs the §193d-promoted ChiroProList hero vertical (chiroprolist.com).
State, county, or ZIP × 13 medical specialties. Per-100k density, national percentile, and a citeable result block. CMS NPPES + U.S. Census, fully sourced. No signup.
Where Americans can — and cannot — see the providers they need.
15 studies →
CMS-published quality data for facility-based care.
5 studies →
Local trades supply and quality, by state and metro.
6 studies →
Network-wide quality, claim readiness, and profile usefulness.
3 studies →
82.40% of CMS's top-10-chain ownership percentages are missing. The Trump administration suspended the mechanism that was supposed to close the gap. PE-owned nursing homes face 11% higher resident mortality and 10× greater bankruptcy risk.
Active U.S. orthopedic surgeons per 100,000 residents, by state, from the public CMS NPI Registry — individually-enumerated providers (NPPES Type 1). Musculoskeletal disease is the leading source of disability in the United States; orthopedic supply per state tells a sharper story than national totals.
The studies above draw on the following datasets. For tier, refresh cadence, fields used, and limitations per source, see /sources.
Each card below is either a v0 methodology page (live, published for review before any rankings exist) or a planned study with the methodology still in draft. No findings, rankings, or numbers appear until the pipeline producing them has been reviewed and signed off.
Local Service Supply Index
Cross-city, cross-vertical measure of local service supply. Built from federal public data — Census County Business Patterns, BLS OEWS, BEA regional accounts — augmented with OwnListed-owned coverage and completeness signals. Methodology-first v0 published; no rankings until the reviewed pipeline produces them.
Read the methodology →
Claimability Gap Report
Per-vertical, per-state gap between indexed providers and providers who have claimed their listing. Frames where the owner-claim funnel has the most room to compound. Methodology in progress; data pipeline draws only on OwnListed-owned claim status, not on third-party signals.
Emergency Home Services Readiness Map
Real numbers from real datasets.
Every figure on this hub traces to a dated snapshot file committed to the OwnListed codebase. We do not estimate. When a number is missing from the snapshot, the section is marked as deferred rather than filled in.
OwnListed analysis is not a quality measurement.
We do not independently rate, inspect, verify, endorse, or guarantee any provider. CMS ratings appear as CMS ratings; OwnListed counts appear as OwnListed counts.
Datasets are downloadable.
Every study with chart-level data publishes both the JSON used to draw the chart and a sibling CSV. Where a study aggregates an underlying source dataset, we cite the source URL and the snapshot date.
Limitations published, prominently.
Every study carries a Limitations section in plain language. A finding without a stated limitation is a finding we do not publish.
Full standards (data sourcing, refresh cadence, corrections): read the methodology.
Free to cite with attribution.
Every study has APA, URL, and BibTeX citation formats. For raw datasets or press inquiries, email press@ownlisted.com.
Active U.S. ophthalmologists per 100,000 residents, by state, from the public CMS NPI Registry — individually-enumerated providers (NPPES Type 1). Vision care is the most common medical specialty referral; ophthalmologist supply per state tells the access story national totals obscure.
Active U.S. gastroenterologists per 100,000 residents, by state, from the public CMS NPI Registry — individually-enumerated providers (NPPES Type 1). Colorectal cancer is the second-leading cause of cancer death; gastroenterologist supply per state is the leading indicator of screening capacity.
Active U.S. urologists per 100,000 residents, by state, from the public CMS NPI Registry — individually-enumerated providers (NPPES Type 1). Rural urology shortages are the most extensively documented specialty access gap in the United States; state-level supply is the leading indicator.
Active U.S. otolaryngologists per 100,000 residents, by state, from the public CMS NPI Registry — individually-enumerated providers (NPPES Type 1). Hearing loss, head and neck cancer, and sleep apnea all funnel through ENT supply; state-level density tells the access story.
Active U.S. cardiologists per 100,000 residents, by state, from the public CMS NPI Registry. Heart disease remains the #1 cause of U.S. death; cardiologist supply per state tells a sharper story than national totals.
Active U.S. obstetrician-gynecologists per 100,000 residents, by state, from the public CMS NPI Registry — individually-enumerated providers (NPPES Type 1) only. Maternity care deserts now affect tens of millions of Americans; state-level OBGYN supply is the leading indicator.
Active U.S. pediatricians per 100,000 residents, by state, from the public CMS NPI Registry — individually-enumerated providers (NPPES Type 1) only. Pediatrician supply is uneven across states with material implications for child health access.
Active U.S. neurologists per 100,000 residents, by state, from the public CMS NPI Registry. Aging population + dementia growth are colliding with a documented neurologist supply gap.
Active U.S. medical oncologists per 100,000 residents, by state, from the public CMS NPI Registry. Cancer care access is geographically concentrated; state oncologist supply maps to cancer mortality patterns.
Active U.S. psychiatrists per 100,000 residents, by state, from the public CMS NPI Registry. Mental health access remains one of the largest public-health gaps in U.S. medicine; state psychiatrist density tells a sharper story than national headlines.
Active U.S. dermatologists per 100,000 residents, by state, from the public CMS NPI Registry.
How Medicare-certified hospice provider count, ownership mix, and recent-certification share distribute across the United States — based on the CMS Care Compare Hospice General Information dataset (6,943 providers, snapshot May 2026). The Hospice General Information dataset does not publish an overall star rating; this report cites provider availability, not quality.
How CMS quality-of-patient-care star ratings and ownership mix distribute across U.S. Medicare-certified home health agencies — based on the CMS Care Compare Home Health Care Agencies dataset (12,392 agencies, snapshot May 2026). CMS ratings are published by CMS; this report cites them, it does not produce them.
How CMS five-star ratings, ownership mix, and chain affiliation distribute across U.S. dialysis facilities — based on the CMS Care Compare Dialysis Facility Listing dataset (7,557 Medicare-certified facilities, snapshot May 2026). CMS ratings are published by CMS; this report cites them, it does not produce them.
How CMS overall star ratings, ownership mix, and Special Focus Facility counts distribute across the 50 states + DC and territories — based on the CMS Care Compare Nursing Home Provider Information dataset (14,699 Medicare/Medicaid-certified facilities, snapshot May 2026). CMS ratings are published by CMS; this report cites them, it does not produce them.
How solar-installer supply distributes across the United States in the Ownlisted indexed dataset — 2,772 active solar businesses across 47 states and 245 cities, carrying 456,339 aggregated Google reviews as of May 2026. Counts describe the indexed directory dataset, not the total US installer market.
How fence-contractor supply distributes across the United States in the Ownlisted indexed dataset — 2,376 active fence businesses across 44 states and 192 cities, carrying 254,226 aggregated Google reviews as of May 2026. Counts describe the indexed directory dataset, not the total US fence-contractor market.
How dermatology-practice supply distributes across the United States in the Ownlisted indexed dataset — 3,339 active practices across 44 states and 197 cities, carrying 1,590,827 aggregated Google reviews as of May 2026. Counts describe the indexed directory dataset, not the total US dermatology workforce.
How HVAC-contractor supply distributes across the United States in the Ownlisted indexed dataset — 4,312 active contractors across 47 states and 244 cities, carrying 4,270,494 aggregated Google reviews as of May 2026. Counts describe the indexed directory dataset, not the total US HVAC contractor market.
What does a credible local-service directory look like, measured against four quality signals consumers and owners actually care about: network coverage, rating, review depth, and category breadth. Reported from the Ownlisted indexed provider dataset — 113,548 listings, 29.9 million Google reviews, 300 cities and 40 verticals — as of April 2026. Not a survey of the U.S. local-services market.
Four signals consumers can read from a public Google Business Profile before they ever pick up the phone — review depth, rating distribution, recency cues, and contact-channel completeness — measured across the 113,548 listings in the Ownlisted indexed provider dataset. Not a survey of the U.S. local-services market.
Where does claiming a directory listing change the most for a business owner? This study measures owner-claim readiness — the structural indicators of claim ROI — across the 5 categories and 12 most-reviewed verticals in the Ownlisted indexed provider dataset. Not a survey of the U.S. local-services market.
The inaugural Ownlisted annual report — analyzing 21,197 listed businesses across 7 home-services verticals, 300 top US cities, and 45 states. Ratings, review volumes, geographic density, and where consumer demand is outpacing supply.
Original data on 4,312 listed HVAC contractors — average ratings by city and state, review volume distribution, geographic density, and the markets where consumer demand is highest.
Original data on 3,470 listed personal injury attorneys — average ratings by city and state, review volume trends, geographic coverage, and where the highest-velocity legal markets are.
An original data study mapping 3,039 active medical weight loss clinics across 44 US states — with a full 50-state access gap analysis, GLP-1 adoption data, and the geographic mismatch between where obesity is highest and where clinics actually exist.
Three states account for 27% of fatal large-truck crashes — but carry 37% of attorneys. A state-by-state analysis of legal representation gaps using NHTSA 2023 fatality data and 3,272 directory attorney listings.
A data study of every listed HVAC contractor in the Ownlisted database — covering review volume, geographic density, rating distributions, and the markets where competition is fiercest.
How prepared are local emergency_home markets — HVAC, water-damage, plumbing, electricians, roofers, foundation-repair — for off-hours dispatch? Planned methodology pulls hours coverage from OwnListed-owned profile-completeness signals plus public BLS OEWS occupational thickness.
Specialist Access Maps
Per-specialty access maps for medical_wellness verticals — dermatology, chiropractic, fertility — answering 'how far is the nearest licensed specialist' in plain English. Planned methodology pulls public licensing-board data plus OwnListed-owned coverage; no quality claims, no review aggregation, no clinical guidance.