A personal health record (PHR) is a health record where health data and other information related to the care of a patient is maintained by the patient. This stands in contrast to the more widely used electronic medical record (EMR), which is operated by institutions (such as hospitals) and contains data entered by clinicians (such as billing data) to support insurance claims. A PHR is intended to provide a complete and accurate summary of an individual's medical history that is accessible online. The health data on a PHR might include patient-reported outcome data, lab results, and data from devices such as wireless electronic weighing scales or (collected passively) from a smartphone.

Definition The term "personal health record" was used as early as June 1978, and, in 1956, there was a reference was made to a "personal health log." The term "PHR" may be applied to both paper-based and computerized systems; usage in the late 2010s usually implies an electronic application used to collect and store health data.

In the early 2000s, healthcare organizations began to propose formal definitions of the term. For example:

PHRs are not the same as electronic health records (EHRs) or electronic medical records (EMRs), which are software systems designed for use by health care providers. Like the data recorded in paper-based medical records, the data in EHRs are legally mandated notes on the care provided by clinicians to patients. However, generally there is no mandate requiring patients to track their own health data. Like EHRs and EMRs, PHRs may still fall under the regulatory scope of governments, depending on their origin, but rigorous regulatory protection of their data is still lacking in parts of the world.

PHRs can contain a diverse range of data, including, but not limited to:

Applicable diagnoses, Medications, including over-the-counter and alternative treatments, Past medical and surgical interventions,

There are two methods by which data can arrive in a PHR. A patient may enter it directly, either by typing into fields or uploading/transmitting data from a file or another website. The second is when the PHR is tethered to an electronic health record, which automatically updates the PHR. Not all PHRs have the same capabilities, and individual PHRs may support one or all of these methods.

In addition to storing an individual's personal health information, some PHRs provide added-value services such as drug-drug interaction checking, electronic messaging between patients and providers, managing appointments, and reminders.

Benefits PHRs grant patients access to a wide range of health information sources, best medical practices, and health knowledge. All of an individual's medical records are stored in one place instead of paper-based files in various doctors' offices. Upon encountering a medical condition, a patient can better access test results, communicate with their doctors, and share information with others who have similar conditions. It is argued that this improves the patient's activation, although the evidence for this is mixed.

Moreover, PHRs can benefit clinicians. PHRs offer patients the opportunity to submit their data to their clinicians' EHRs. This may help clinicians make better treatment decisions by providing more continuous data, resulting in more efficient care. However, some physicians may have concerns about patient-entered information and its accuracy, as well as whether the added patient engagement creates more reimbursable work.

Other examples of how PHRs can benefit health care providers:

PHRs can potentially help analyze an individual's health profile and identify health threats and improvement opportunities based on an analysis of drug interaction, current best medical practices, gaps in current medical care plans, and identification of medical errors. Patient illnesses can be tracked in conjunction with healthcare providers, and early interventions can be promoted upon encountering deviation of health status. PHRs also make it easier for clinicians to care for their patients by facilitating continuous communication as opposed to episodic. Eliminating communication barriers and allowing documentation flow between patients and clinicians in a timely fashion can save time consumed by face-to-face meetings and telephone communication. Improved communication can also ease the process for patients and caregivers to ask questions, to set up appointments, to request refills and referrals, and to report problems. Accessing their own records can also empower patients to actively manage their health conditions. In the case of an emergency, a PHR can quickly provide critical information to proper diagnosis or treatment.

Architecture Like other health information technology, PHR architecture can be roughly organized into three main components: Data The information collected, stored, analyzed, and exchanged by the PHR. Examples: medical history, laboratory results, imaging studies, medications. Infrastructure The platform that handles data storage, processing, and exchange. Examples: standalone software programs or websites, provider- or payer-connected (tethered) websites. Applications The information exchange, data analysis, and content delivery capabilities of the system. Examples: scheduling appointments, medication refill or renewal, decision aids, and patient education materials.

Architecture types remain various. However, in 2017, Roehrs et al. performed a systematic literature review of PHRs and were able to divide architecture types into two groups: model-based and coverage-based. Model architectures represent more traditional takes on PHRs, including health data that is still stored on paper. Coverage architectures represent more hybrid takes on the PHR, "with the PHR distributed inside and outside the health care organizations" based on the data's physical location.

The associated architectural types have different costs and benefits. Likewise, standalone, provider-tethered, and payer-tethered PHRs have different advantages and disadvantages for patients related to their individual circumstances. Such differences are among the priority areas in PHR research.

As PHRs may play a key role in advancing health information exchange, interoperability with other health IT systems is an important consideration for PHR architecture. Additionally, PHR systems requires users to put forth an "'ongoing' effort to keep their account up to date" (maintain an active role in managing their own health), which in turn requires further examination of PHR architecture and adoption models by developers.

Delivery platforms One of the principal distinguishing features of a PHR is the platform by which it is delivered. The types of platforms include: paper, electronic device, and web.

Paper Personal health information is recorded and stored in paper format. Printed laboratory reports, copies of clinic notes, and health histories created by the individual may be parts of a paper-based PHR. This method is low cost, reliable, and accessible without the need for a computer or any other hardware. Probably the most successful paper PHR is the hand-held pregnancy record, developed in Milton Keynes in the mid-1980s and now in use throughout the United Kingdom. These include the Scottish Woman-Held Maternity Record, All Wales Maternity Record, and Perinatal Institute notes.

Paper-based PHRs may be difficult to locate, update, and share with others. Paper-based PHRs are subject to physical loss and damage, such as can occur during a natural disaster. Paper records can also be printed from most electronic PHRs. However, Fawdry et al. have shown that paper records are extremely flexible and do have distinct advantages over rigid electronic systems.

Electronic devices Personal health information is recorded and stored in personal computer-based software that may have the capability to print, backup, encrypt, and import data from other sources such as a hospital laboratory. The most basic form of a PC-based PHR would be a health history created in a word-processing program. The health history compiled in computer software can be printed, copied, and shared with anyone with a compatible word processor.

PHR software can provide more sophisticated features such as data encryption, data importation, and data sharing with health care providers. Some PHR products allow the copying of health records to a mass-storage device such as a CD-ROM, DVD, smart card, or USB flash drive.

PC-based PHRs are subject to physical loss and damage of the personal computer and the data that it contains. Some other methods of device solution may entail cards with embedded chips containing health information that may or may not be linked to a personal computer application or a web solution.

Web applications Web-based PHR solutions are essentially the same as electronic device PHR solutions, however, web-based solutions have the advantage of being easily integrated with other services. For example, some solutions allow for import of medical data from external sources. Solutions including HealthVault, and PatientsLikeMe allow data to be shared with other applications or specific people. Mobile solutions often integrate themselves with web solutions and use the web-based solution as the platform.

A large number of companies have emerged to provide consumers the opportunity to develop online PHRs. Some have been developed by nonprofit organizations, while others have been developed by commercial ventures. These web-based applications allow users to directly enter their information such as diagnosis, medications, laboratory tests, immunizations and other data associated with their health. They generate records that can be displayed for review or transmitted to authorized receivers.

Despite the need for PHRs and the availability of various online PHR providers, there has not been wide adoption of PHR services. E.g. Google discontinued its PHR service called Google Health on January 12, 2012. The reason cited for shutting down Google Health was that the service did not translate from its limited usage into widespread usage in the daily health routines of millions of people. Surveys of web-based services have found wide variations in functions between services and only limited data on efficacy and safety concerns. One analyst, describing the public's reluctance to adopt the services, called PHRs "a technology in search of a market."

An emerging standard from HL7, Fast Healthcare Interoperability Resources (FHIR), is designed to make it easier for developers of personal health record applications to access relevant medical records.

EHRs, PHRs, patient portals and UHRs The terms electronic health records, personal health records, and patient portals are often used interchangeably. However, they differ by definition and in practice. The generally agreed upon definition of these terms relates mainly to the ownership of the data. Once data is in a PHR it usually owned and controlled by the patient. The patient can edit, save or share this record with anyone. Finally, PHRs are data that resides with the patient, in a system of the patient's choosing. This data may have been exported directly from an EMR, but the point is it now resides in a location of the patient's choosing. Access to that information is controlled entirely by the patient. While PHRs can help patients keep track of their personal health information, the value of PHRs to healthcare organizations is still unclear.