Epocrates
A clinical reference application that gives healthcare professionals point-of-care access to drug, disease, and treatment information.
Last updated August 22, 2026
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Overview
Epocrates is a United States healthcare software brand centered on a mobile clinical reference application for physicians, pharmacists, nurse practitioners, physician assistants, and other healthcare professionals. Its tools are designed for use at the point of care, where clinicians may need rapid access to medication dosing information, drug-interaction checks, safety details, medical calculations, disease references, diagnosis and treatment guidance, clinical news, and evidence-based practice information. The company originated in 1998, when three Stanford Business School students developed an early version of the product for Palm handheld devices. This initial focus placed Epocrates within the first generation of mobile medical-information tools, when clinicians increasingly used personal digital assistants to carry reference material into clinical settings. Early versions also ran on desktop computers, allowing the service to extend beyond a single handheld platform. Epocrates expanded its user base during the 2000s. By 2006, it reportedly had approximately 525,000 users worldwide, including about 200,000 physicians in the United States. The arrival of Apple's iPhone created an important platform transition: Epocrates became the first medical application available for Apple's mobile platform, helping it remain relevant as professional software moved from Palm devices and desktop environments to smartphones. By 2010, the company had grown to more than 250 employees and reported more than one million users worldwide, including roughly 40 percent of physicians in the United States. The brand's principal offering has remained its clinical reference app. Epocrates provides both free and paid subscription versions, with distribution through Apple's App Store and Google Play. The free and subscription tiers support a broader commercial model in which basic reference access is combined with more extensive or premium clinical content. The application is marketed as a decision-support and information-access tool rather than as a replacement for professional judgment. On January 7, 2013, athenahealth announced an agreement to acquire Epocrates for approximately $293 million. Following the transaction, Epocrates became part of athenahealth's healthcare technology portfolio. The acquisition connected Epocrates' mobile clinical reference capabilities with a larger healthcare software company whose products served medical practices and other healthcare organizations. Epocrates has continued to be presented as a distinct brand and application within that broader corporate context. In February 2022, Matt Titus was appointed chief operating officer. Public reference material identifies the COO appointment but does not provide enough information to establish a complete current executive roster. Overall, Epocrates is positioned as a professional clinical-reference brand whose value rests on portability, rapid retrieval, medication-safety information, and the integration of medical knowledge into everyday healthcare workflows.
History
Epocrates was established in 1998 by three students from Stanford Business School. Its first product was developed for Palm handheld computers, reflecting the importance of personal digital assistants in the early mobile-computing and clinical-information markets. The application was intended to make medical reference content available to healthcare professionals while they were working, rather than requiring them to consult a desktop or printed reference source. Early releases were also made available for desktop computers. The combination of handheld and desktop access helped Epocrates build a user base before smartphones became the dominant mobile platform. By 2006, the application reportedly had approximately 525,000 users worldwide, including about 200,000 doctors in the United States. The company received early support from venture-capital investors including Bay City Capital, Draper Fisher Jurvetson, InterWest Partners, Sprout Group, and Three Arch Partners. A major technological turning point came with the launch of Apple's iPhone. Epocrates became the first medical application on Apple's mobile platform, allowing the brand to transfer its clinical-reference model from Palm devices to a newer generation of smartphones. This shift broadened the practical role of the application and supported its use as a point-of-care tool for clinicians who needed fast access to medication and disease information in hospitals, offices, and other healthcare settings. The company expanded substantially during the late 2000s. In 2010, it was reported to have more than 250 employees and over one million users worldwide. The same reference material stated that approximately 40 percent of physicians in the United States used Epocrates. These figures indicate that the application had become a widely recognized professional reference product rather than a niche personal-digital-assistant utility. The product's scope developed around several related clinical tasks. Users could consult drug dosing and safety information, check potential interactions, review medical news, access disease and diagnosis references, and use clinical calculations. The application also incorporated treatment guidance and evidence-based clinical practice information. Epocrates therefore occupied a position between a drug reference, a medical-information database, and a point-of-care decision-support application. Its materials were intended to assist clinicians, while the final diagnosis and treatment decisions remained the responsibility of qualified healthcare professionals. On January 7, 2013, athenahealth announced that it would acquire Epocrates for approximately $293 million. The acquisition made Epocrates a subsidiary brand within athenahealth and connected its mobile reference capabilities with a broader healthcare software portfolio. The Epocrates name and application continued to be marketed separately, with free and paid subscription editions distributed through the App Store and Google Play. In February 2022, Matt Titus was appointed chief operating officer. Available reference material does not establish a complete list of later executives, ownership changes, financial performance, or a detailed chronology of product releases. On the documented record, Epocrates remains an active healthcare software brand focused on mobile clinical reference and point-of-care information access.
- 2022
Matt Titus becomes chief operating officer
[1]Matt Titus is appointed chief operating officer of Epocrates.
- 2013
Acquisition by athenahealth
[1]athenahealth announces an agreement to acquire Epocrates for approximately $293 million.
- 2010
Epocrates exceeds one million users
[1]The company is reported to have more than 250 employees and over one million users worldwide, including a substantial share of United States physicians.
- 2007
Launch on Apple's mobile platform
[1]Following the introduction of the iPhone, Epocrates becomes the first medical application available on Apple's mobile platform.
- 2006
User base reaches approximately 525,000
[1]Epocrates is reported to have about 525,000 users worldwide, including approximately 200,000 physicians in the United States.
- 1998
Epocrates is founded
[1]Three Stanford Business School students establish Epocrates and develop an early clinical-reference application for Palm handheld devices.
Products and positioning
A portable, point-of-care clinical reference resource for healthcare professionals, emphasizing rapid access to medication, disease, diagnostic, and treatment information.
Clinical reference application · 1998
Epocrates mobile application
The core Epocrates product is a mobile clinical reference application for physicians, pharmacists, nurse practitioners, physician assistants, and other healthcare professionals. It provides point-of-care access to drug dosing, drug-interaction information, medication safety details, disease references, diagnosis and treatment guidance, medical news, clinical calculations, and evidence-based practice information. The app is distributed through the Apple App Store and Google Play.
Freemium clinical reference software
Epocrates free version
The free edition provides no-cost access to selected Epocrates clinical-reference capabilities. It is part of the brand's tiered product model and is designed to give healthcare professionals entry-level access to medication and point-of-care information while supporting conversion to paid services.
Paid clinical reference subscription
Epocrates subscription version
The paid subscription edition extends the application's clinical-reference offering with additional professional content and functionality beyond the free tier. It is marketed to healthcare professionals who require broader access to drug, disease, treatment, and decision-support information in routine clinical work.
Brand decisions
2013
athenahealth acquisitionM&ABackground
Epocrates had developed a substantial professional user base and a mobile clinical-reference product that complemented broader healthcare information-technology services.
Action taken
athenahealth announced an agreement to acquire Epocrates for approximately $293 million.
Aftermath
Epocrates became a subsidiary brand of athenahealth while continuing to operate under its own name and offer free and paid versions of its application.
Announced acquisition value. $293 million (2013 announcement)
Sources2 sources
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