Isabel Healthcare

What Isabel Healthcare does

Isabel Healthcare is a private, founder-led clinical decision support company founded in 1999 by Jason Maude following the near-fatal misdiagnosis of his daughter. Headquartered in Ann Arbor, Michigan (US) and London (UK), the company operates with 11-50 employees and a charity-anchored ownership structure, distributing proprietary machine-learning-based differential diagnosis technology to clinicians, healthcare institutions, and partner platforms across 90+ countries and 14 languages.

The company's core technology is a proprietary pattern recognition engine trained for 22+ years on a curated database of 10,000+ disease presentations, with claimed 96% accuracy placing the correct diagnosis in the top-10 differential list. This engine underpins three commercial products: Isabel DDx Companion (clinician-facing differential diagnosis generator producing a ranked list in under 90 seconds from minimal presenting features), Isabel Self-Triage (patient-facing triage engine asking 11 standard questions in under 60 seconds with a 97% completion rate), and Isabel Clinical Educator (case-based learning platform mapped to UK MLA and US MLE curricula). The October 2025 Premium tier adds an LLM interface for diagnosis comparison tables and instant summaries, layered atop the validated DDx engine. Distribution is multi-channel: direct enterprise field sales, self-serve individual subscriptions, white-label API integration (live since 2010), EMR marketplace listings (Cerner, Epic, NextGen, T-System, TPP SystemOne), and consumer health platform partnerships including six conversational AI vendors.

Isabel monetizes through four revenue streams: individual clinician subscriptions at £119-155/year (~$149-199), custom institutional enterprise contracts sized to annual admissions or user count, API/integration licensing for white-label deployment, and a free consumer Symptom Checker that drives patient-acquisition referrals. Discount programs (67% student, 50% Emerging Economy Nations) broaden the accessible buyer base at the cost of ASP. The company holds GDPR-compliant data practices, has 20+ peer-reviewed validation studies, and was ranked 6th of 7 in Glass Health's 2026 Clinical Decision Support review at 60/100, reflecting a well-validated but competitively middling position versus next-generation AI-native clinical decision support entrants.

Name

Isabel Healthcare

Legal name

Isabel Healthcare

Website

https://isabelhealthcare.com

Company type

Private

Founded year

1999

Operating status

Operating

Headcount range

11–50 employees

Short description

Isabel Healthcare provides AI-based clinical decision support tools — including the DDx Companion, Self-Triage, and Clinical Educator platforms — to clinicians, hospitals, and health technology partners across 90+ countries, using proprietary machine-learning pattern recognition trained over 22 years on 10,000+ disease presentations.

Ownership category

akta.pro rank

Product category

Clinical Decision Support Software

NAICS

Software Publishers (5132)

SIC

Services-Prepackaged Software (7372), Services-Computer Programming, Data Processing, Etc. (7370)

akta.pro primary industry

Diagnostic & Triage Decision Support (HLACAGAA)

akta.pro secondary industries

AI Triage & Clinical Decision Support (CDS) Platforms (HLALAJAD), Clinical Triage, Care Navigation & Routing Engines (HLALAKAH)

Keywords

• Clinical decision support
• Differential diagnosis software
• Patient symptom triage
• Medical education platform
• Healthcare AI tools

Headquarters

HQ city

Ann Arbor

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B and B2C

Offering type

Software

Cost components

Technology or R&D, Personnel, Marketing or Sales, Operations, Infrastructure

Revenue model

1. Individual Subscriptions: Annual subscription-based access to Isabel DDx Companion and Clinical Educator for individual clinicians. Offered at Standard (£119/year) and Premium (£155/year) tiers with unlimited access across devices.
2. Institutional/Enterprise Subscriptions: Annual subscription pricing based on organization size (annual inpatient admissions or number of users). Includes account setup, customization, training, awareness tools, basic integrations, and ongoing support. Multiple pricing options including per use, fixed unlimited use, per member per month.
3. API/Integration Licensing: Revenue from organizations embedding Isabel tools via API into their platforms. Partners pay for API access to integrate Self-Triage or DDx Companion functionality into their products and workflows.
4. Patient Self-Triage (Free with Institutional Limits): Consumer-facing symptom checker available free to patients (5 searches/day limit). Generates institutional adoption and referrals to professional tools. Funded by institutional subscriptions and charity support.

Pricing tiers

Go-to-market motion3 records

Distribution channels7 records

Marketing channels11 records

Core offering

Isabel Healthcare develops and sells AI/ML-powered clinical decision support software that converts patient signs and symptoms into ranked differential diagnoses or triage advice. The company offers three core products: Isabel DDx Companion (professional differential diagnosis tool covering 10,000+ diseases for clinicians), Isabel Self-Triage (patient-facing triage engine using 11 questions in under 60 seconds), and Isabel Clinical Educator (case-based learning platform for medical students). The tools are delivered via individual subscriptions, institutional enterprise agreements, and a comprehensive white-label API suite.

Product overview

Isabel Healthcare offers a platform of three distinct clinical reasoning tools powered by proprietary machine learning technology trained since 1999. The core products are: Isabel DDx Companion (professional differential diagnosis tool), Isabel Self-Triage (patient-facing triage engine), and Isabel Clinical Educator (case-based learning platform). These tools share Isabel's pattern recognition engine that applies NLP to a database of 10,000+ disease presentations, generating ranked differentials from minimal symptoms in under 90 seconds. Products are available via web subscription (Standard and Premium tiers), institutional enterprise agreements, and white-label API integration. The company also offers a free patient Symptom Checker in 14 languages. Premium tier adds LLM integration for diagnosis comparison and summaries. Integration options include EMR connectivity (Cerner, Epic, NextGen, T-System) and comprehensive API for white-label deployment.

Differentiator

Problem solved

Functional benefit

Brands

• Isabel DDx Companion: Differential diagnosis generation tool for healthcare professionals to expand their differential diagnosis and gain reassurance in decision making.
• Isabel Self-Triage
• Isabel Clinical Educator

Products and services

• Isabel DDx Companion Professional differential diagnosis generation tool that expands clinicians' differential and provides reassurance in decision making. Uses machine learning pattern recognition on a database of over 10,000 diseases to generate accurate differentials in under 90 seconds from minimal presenting clinical features. Covers all ages, specialties, and conditions with 96% accuracy showing final diagnosis in top 10 differential.
• Isabel Self-Triage Virtual self-triage tool for patient experience workflows that helps patients access appropriate care more quickly. Asks just 11 standard questions in under 60 seconds with 97% completion rate. Available via API or native browser version for deployment across websites, apps, conversational AI, call centers, and digital channels.
• Isabel Clinical Educator Case-based virtual learning platform for teaching and assessing clinical reasoning skills in medical students and healthcare professionals. Combines DDx Companion with reflective case-based learning and evidence-based tools. Includes a core library of over 120 cases mapped to UK MLA and US MLE requirements.
• Isabel API Suite Comprehensive headless API enabling white-label integration of Self-Triage and/or DDx Companion functionality into third-party platforms and workflows. Includes Self-Triage API, DDx Companion API, and bridge capabilities. Accepts URL-format requests with JSON/JSONP responses.
• Isabel Symptom Checker (Patient Version) Free patient-facing symptom checker adapted from the professional DDx Generator, covering 6,000+ diseases. Allows unlimited symptoms entered in everyday language with a 'Where to get care' triage function. Available in 14 languages including English, Spanish, German, French, Dutch, Portuguese, Russian, Romanian, Tagalog, Arabic, Chinese (Simplified), Malayalam, Urdu, and Hindi.
• Isabel DDx Companion Premium with LLM Integration Premium tier of DDx Companion incorporating an LLM interface that generates a diagnosis compare table comparing key variables (symptoms, differentiating tests, prognosis, treatments) between diagnoses, plus LLM-powered instant summaries highlighting differences between diagnoses to streamline the diagnostic process.

Quantifiable outcome

• 96% accuracy showing correct diagnosis in top 10 differential
• +6 more outcomes

Named customers7 records

Segments7 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration17 records

AI capability7 records

Feature6 records

Partnerships

Twelve partnerships are on record, tiered core.

• CernercoreTechnology or IntegrationEMR integration partner. Isabel DDx available in Cerner App Gallery, enabling Cerner users to access differential diagnosis capabilities directly within their EMR workflow.
• NextGen HealthcarecoreTechnology or IntegrationEMR integration partner. NextGen integrates Isabel DDx for clinical decision support within their electronic health records platform.
• T-System (TSYS)coreTechnology or IntegrationEMR integration partner providing Isabel DDx capabilities to T-System's emergency department and urgent care documentation solutions.
• TPP (SystemOne)coreTechnology or IntegrationUK-based EMR partner integrating Isabel DDx into their GP/primary care clinical system.
• DynaMed (EBSCO)coreTechnology or IntegrationContent partnership providing DynaMed evidence-based clinical content linked to Isabel diagnosis results. Long-term partner since early years.
• DynaMedex (EBSCO)coreTechnology or IntegrationContent partnership providing combined DynaMedex content integrated with Isabel diagnosis tool.
• EBSCO Health LibrarycoreTechnology or IntegrationContent partnership providing Health Library resources linked to Isabel diagnosis results.
• MSD Manuals (Professional and Consumer)coreTechnology or IntegrationContent partnership providing MSD Manual medical reference content linked to Isabel diagnosis results for both professional and consumer versions.
• MedscapecoreTechnology or IntegrationContent partnership providing Medscape clinical resources linked to Isabel diagnosis results.
• BMJ Best PracticecoreTechnology or IntegrationContent partnership providing BMJ Best Practice evidence-based treatment protocols linked to Isabel diagnosis results.
• 5MinuteConsultcoreTechnology or IntegrationPremium tier feature providing direct access to 5MinuteConsult clinical decision support resources integrated with Isabel DDx Companion.
• Global Response ManagementcoreStrategic or Co-development PartnerNGO partner providing humanitarian medical assistance. Field visit documented Dr. David Flood using Isabel in Guatemala with Maya Health Alliance. Focused on bringing medical knowledge to resource-limited settings.

Scale indicators12 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• VisualDx: VisualDx is a clinician-facing differential diagnosis and visual clinical decision support platform. It overlaps directly with Isabel's DDx Companion in providing ranked differentials and image-supported diagnosis support for healthcare professionals.
• DynaMed (EBSCO): DynaMed is an evidence-based clinical decision support reference tool from EBSCO and a content partner of Isabel. Both deliver clinician decision support and overlap on linking evidence-based content to diagnosis and treatment decisions at the point of care.
• MDCalc: MDCalc is a widely-used clinician-facing clinical decision support tool focused on calculators, risk scores, and diagnostic criteria. It competes for the same clinician mindshare and workflow integration points as Isabel's DDx Companion.
• Ada Health: Ada Health provides an AI-powered symptom assessment and triage platform for both consumers and health systems. It directly competes with Isabel Self-Triage on AI-driven patient-facing triage and with the API/white-label partner channel.
• Infermedica: Infermedica offers an AI-driven symptom checker and triage API used by health systems, insurers, and telemedicine providers. It directly competes with Isabel Self-Triage and the white-label API distribution model.
• Epocrates: Epocrates is a clinician-facing point-of-care decision support and drug reference tool. It overlaps with Isabel DDx Companion as a daily-use clinical reference and competes for individual clinician subscriptions.
• BMJ Best Practice: BMJ Best Practice is an evidence-based clinical decision support tool from BMJ and an Isabel content partner. Both deliver clinician decision support with evidence-linked diagnosis and treatment content at the point of care.

Broad incumbents

• UpToDate (Wolters Kluwer): UpToDate is the dominant evidence-based clinical decision support resource from Wolters Kluwer, used widely by hospitals and clinicians. It is a broader incumbent with deeper enterprise penetration and overlaps with Isabel in supporting clinician decision-making.
• WebMD Symptom Checker: WebMD operates a widely-used consumer symptom checker alongside its broader health information portal. It overlaps with Isabel's free consumer Symptom Checker as a broad incumbent in patient-facing symptom triage.

Emerging players

• K Health: K Health is an AI-driven virtual care platform that includes AI-assisted symptom assessment and triage. It is an emerging player with partial overlap to Isabel Self-Triage on AI-driven patient triage, primarily in the US direct-to-consumer and payer channel.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/isabelhealth
• YouTubeyoutube.com/user/IsabelHealthcare100
• Facebookfacebook.com/134106729945054
• LinkedInlinkedin.com/company/isabel-healthcare

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Isabel Healthcare