acponline.org
Link authority for acponline.org (registrable domain: acponline.org) from the Common Crawl web graph: PageRank and harmonic centrality history since 2017, current scores, and the site's top backlink sources.
Web-graph authority (0-100)
Domain scores measure acponline.org as a whole: every subdomain's links rolled up into one node of Common Crawl's domain-level web graph. Host scores measure the exact hostname acponline.org. WWW scores cover the www variant of that hostname, which the graph tracks as its own entry since January 2026 (before that, www and bare host were merged). A big gap between domain and host usually means the domain's authority lives on other subdomains. PageRank is link-endorsement authority: how much weight the sites linking here carry themselves. Harmonic centrality measures reach: how close this site sits to the rest of the web when following links, which favors broadly connected sites over ones boosted by a few heavy linkers. All are normalized 0 to 100 within each crawl snapshot; a dash means that series does not exist for this site.
Homepage
What acponline.org presents on its own homepage: the page title, description, and the social share markup it publishes. Pulled from https://acponline.org.
| Title | American College of Physicians | Internal Medicine | ACP |
|---|---|
| Description | Official site of the American College of Physicians. ACP provides advocacy, practice tools, clinical guidance, CME and MOC for Internal Medicine and more. |
Social accounts and contact points
Where this site maintains a presence and every reachable route its homepage exposes: social accounts, contact pages, addresses, and content feeds.
| ACPIMPhysicians | |
| X | ACPIMPhysicians |
| american-college-of-physicians (business) | |
| acpimphysicians | |
| Threads | acpimphysicians |
| Contact pages | https://www.acponline.org/contact |
|---|
Structured data (JSON-LD)
The schema.org markup this homepage publishes: the machine-readable identity search engines and AI systems read. Types found: Organization.
JSON-LD block (8,770 bytes)
{
"@context": "https://schema.org",
"@type": "Organization",
"@id": "https://www.acponline.org/#organization",
"url": "https://www.acponline.org",
"name": "American College of Physicians",
"legalName": "American College of Physicians",
"alternateName": [
"ACP",
"ACP online",
"A.C.P",
"internal medicine physicians",
"College of Physicians (USA)"
],
"image": "https://www.acponline.org/path-to-logo.png",
"logo": {
"@type": "ImageObject",
"@id": "https://www.acponline.org/#logo",
"url": "https://www.acponline.org/themes/acp_scratch/images/acp-logo-horizontal-4c.svg",
"contentUrl": "https://www.acponline.org/themes/acp_scratch/images/acp-logo-horizontal-4c.svg",
"caption": "American College of Physicians Logo"
},
"description": "The American College of Physicians is the largest medical specialty organization in the United States with members in more than 172 countries worldwide. ACP membership includes 162,000 internal medicine physicians, related subspecialists, and medical students.",
"foundingDate": "1915",
"founder": {
"@type": "Person",
"name": "Heinrich Stern"
},
"address": [
{
"@type": "PostalAddress",
"streetAddress": "190 North Independence Mall West",
"addressLocality": "Philadelphia",
"addressRegion": "PA",
"postalCode": "19106-1572",
"addressCountry": "US"
},
{
"@type": "PostalAddress",
"streetAddress": "25 Massachusetts Ave NW #700",
"addressLocality": "Washington",
"addressRegion": "DC",
"postalCode": "20001",
"addressCountry": "US"
}
],
"telephone": "+1-800-227-1915",
"contactPoint": [
{
"@type": "ContactPoint",
"email": "help@acponline.org",
"telephone": "+1-888-344-6547",
"contactType": "Customer Support",
"areaServed": ["US", "CA"]
},
{
"@type": "ContactPoint",
"telephone": "+1-202-682-2960",
"contactType": "Office"
}
],
"sameAs": [
"https://www.facebook.com/ACPIMPhysicians/",
"https://www.twitter.com/ACPIMPhysicians",
"https://www.linkedin.com/company/american-college-of-physicians/",
"https://www.youtube.com/channel/UCVaq2oZka4PvDZzPHt1u8gA",
"https://www.youtube.com/@AmericanCollegeofPhysicians",
"https://www.threads.net/@acpimphysicians",
"https://lux.collections.yale.edu/view/group/362a1e83-7fd3-48ef-96da-0ea1d9e12885",
"https://www.quora.com/topic/American-College-of-Physicians",
"https://en.wikipedia.org/wiki/American_College_of_Physicians",
"https://www.google.com/search?kgmid=/m/050rjs",
"https://www.wikidata.org/wiki/Q463707",
"https://www.crunchbase.com/organization/american-college-of-physicians",
"https://www.acpjournals.org/journal/aim",
"https://www.acpjournals.org/journal/aimcc",
"https://www.acpjournals.org/loi/ajc",
"https://www.wikidata.org/wiki/Q92635183",
"https://www.acpjournals.org/"
],
"naics": ["813920", "611430", "511120"],
"areaServed": {
"@type": "GeoShape",
"name": "Worldwide",
"addressCountry": "International"
},
"member": {
"@type": "Audience",
"audienceType": "Internal medicine physicians, subspecialists, residents, and medical students in 84 chapters and regions across the U.S. and internationally"
},
"department": {
"@type": "Organization",
"name": "ACP Chapters and Regions",
"url": "https://www.acponline.org/about-acp/chapters-regions",
"description": "ACP has 84 chapters and regions spanning all 50 U.S. states, the District of Columbia, U.S. territories, and multiple countries around the world."
},
"hasMemberProgram": {
"@type": "MemberProgram",
"name": "ACP Membership Program",
"url": "https://www.acponline.org/membership",
"hasTiers": "https://www.acponline.org/membership",
"id": "https://www.acponline.org/membership/#membership",
"description": "ACP membership provides access to thousands of hours of free CME/MOC, discounts on premier educational offerings, subscriptions to the Annals of Internal Medicine, evidence-based clinical tools like DynaMedex®, and opportunities for advocacy, leadership, and career development across diverse member types including physicians, residents, students, and international professionals.",
"hostingOrganization": {
"@id": "https://www.acponline.org/#organization"
}
},
"knowsAbout": [
{
"@type": "DefinedTerm",
"name": "internal medicine",
"sameAs": [
"http://www.wikidata.org/wiki/Q11180",
"https://en.wikipedia.org/wiki/Internal_medicine",
"https://www.google.com/search?kgmid=/m/01d3n8"
],
"additionalType": ["http://www.productontology.org/id/Internal_medicine"],
"description": "Medical specialty dealing with the prevention, diagnosis, and treatment of diseases of internal organs"
},
{
"@type": "DefinedTerm",
"name": "clinical practice guidelines",
"sameAs": ["http://www.wikidata.org/wiki/Q29866653"]
},
{
"@type": "DefinedTerm",
"name": "continuing education",
"sameAs": [
"http://www.wikidata.org/wiki/Q828748",
"https://en.wikipedia.org/wiki/Continuing_education"
],
"additionalType": ["http://www.productontology.org/id/Continuing_education"],
"description": "Education undertaken after initial education for either personal or professional reasons"
},
{
"@type": "DefinedTerm",
"name": "continuing education unit",
"sameAs": [
"http://www.wikidata.org/wiki/Q5165400",
"https://en.wikipedia.org/wiki/Continuing_education_unit"
],
"additionalType": ["http://www.productontology.org/id/Continuing_education_unit"],
"description": "Measure used for professionals to maintain licenses"
},
{
"@type": "DefinedTerm",
"name": "medical ethics",
"sameAs": [
"http://www.wikidata.org/wiki/Q237151",
"https://en.wikipedia.org/wiki/Medical_ethics"
],
"additionalType": ["http://www.productontology.org/id/Medical_ethics"],
"description": "System of moral principles of the practice of medicine"
},
{
"@type": "DefinedTerm",
"name": "health policy",
"sameAs": [
"http://www.wikidata.org/wiki/Q1519812",
"https://en.wikipedia.org/wiki/Health_policy",
"https://www.google.com/search?kgmid=/m/027f8fj"
],
"additionalType": ["http://www.productontology.org/id/Health_policy"],
"description": "Policy area which deals with the planning, organization, management, and financing of the health system"
},
{
"@type": "DefinedTerm",
"name": "health services accessibility",
"sameAs": ["http://www.wikidata.org/wiki/Q67075251"],
"description": "Ease of individual access to care and services from the health care system"
},
{
"@type": "DefinedTerm",
"name": "medical education",
"sameAs": [
"http://www.wikidata.org/wiki/Q26298515",
"https://www.google.com/search?kgmid=/m/079y65"
]
},
{
"@type": "DefinedTerm",
"name": "medical education in the United States",
"sameAs": [
"http://www.wikidata.org/wiki/Q6806523",
"https://en.wikipedia.org/wiki/Medical_education_in_the_United_States"
],
"additionalType": ["http://www.productontology.org/id/Medical_education_in_the_United_States"],
"description": "Educational activities for physicians in the United States"
},
{
"@type": "DefinedTerm",
"name": "continuing medical education",
"sameAs": [
"http://www.wikidata.org/wiki/Q123220",
"https://en.wikipedia.org/wiki/Continuing_medical_education",
"https://www.google.com/search?kgmid=/m/08f15k"
],
"additionalType": ["http://www.productontology.org/id/Continuing_medical_education"],
"description": "Educational programs to inform physicians of recent advances"
}
],
"hasOfferCatalog": {
"@type": "OfferCatalog",
"@id": "https://www.acponline.org/#OfferCatalog",
"name": "ACP Offerings",
"itemListElement": [
{
"@type": "Offer",
"itemOffered": {
"@id": "https://www.acponline.org/featured-products/acp-mksap#product"
}
},
{
"@type": "Offer",
"itemOffered": {
"@id": "https://annualmeeting.acponline.org/recordings#product"
}
}
]
},
"event": {
"@type": "EducationEvent",
"@id": "https://annualmeeting.acponline.org/#InternalMedicineMeeting",
"name": "ACP Internal Medicine Meeting",
"url": "https://annualmeeting.acponline.org/"
}
}
Authority over time
Every Common Crawl web-graph release since 2017, roughly quarterly. The domain series goes back to 2017; Common Crawl only began publishing the host-level graph in 2020, so host lines start there. Click a legend entry to show or hide that line. Flat lines are normal for established sites; watch for sustained rises or drops, which track real gains or losses in who links here.
A note on www: through the end of 2025 the source web graph merged www and non-www hostnames into the bare name, so one host line covers both. Starting in January 2026 the graph splits them into separate entries, which is why www can carry its own scores going forward.
Backlink counts
Unique linking domains seen in Common Crawl's link graphs. This is a different dataset than the 0-100 authority scores above: these are raw counts, host-level for acponline.org and domain-level for acponline.org with all its subdomains combined. Common Crawl covers a large sample of the web, not all of it, so treat counts as comparable between sites rather than absolute totals.
Top backlinks in the domain graph
Common Crawl publishes two link graphs. The DOMAIN graph connects whole domains: every link from any page of one domain to any page of another. This table shows the highest-authority domains linking to acponline.org (including its subdomains), ranked by the linker's PageRank. The table shows the top 1,000; the download carries the full stored list (up to 10,000 linkers) as JSON. Click a linker for its own site profile.
Top backlinks in the host graph
The HOST graph connects exact hostnames, so subdomains count separately. This table shows the highest-authority hosts linking to acponline.org specifically, ranked by the linker's PageRank. The table shows the top 54; the download carries the full stored list (up to 10,000 linkers) as JSON. Click a linker for its own site profile.