Michele Torres, a 62-year-old retired teacher in Phoenix, does everything her cardiologist asks. She takes her lisinopril every morning. She cut salt from her diet. And every evening, she sits quietly for five minutes, then wraps a home blood pressure cuff around her left arm and presses start. The device beeps, displays a number—usually around 128/78—and stores it in its memory. At her next appointment, Dr. Patel flips through her chart, checks the office reading—which is almost always higher, sometimes 145/92—and adjusts her medication accordingly. He never asks to see her home log. "I bring it every time," Torres says. "He just doesn't look."

Torres is not alone. Millions of Americans with hypertension now own home blood pressure monitors, often prescribed by their doctors or covered by insurance. Insurers including Medicare and many private plans reimburse for the devices under durable medical equipment benefits. Yet a growing body of evidence—including a 2022 meta-analysis in The Lancet and a 2021 study in Hypertension—and clinical guidelines from the American Heart Association and American College of Cardiology say that out-of-office blood pressure readings—whether from home monitors or 24-hour ambulatory devices—predict heart attacks, strokes, and kidney damage more accurately than the rushed measurements taken in exam rooms. Despite this, the majority of US clinicians continue to base treatment decisions almost exclusively on in-office readings, effectively ignoring a valuable source of patient-generated data.

The disconnect stems from a mix of workflow design, liability fears, and a reimbursement system that rewards data collection rather than clinical action. But some health systems have found ways to bridge the gap, and their experiences offer a roadmap for the rest of the country.

The Home Monitor Boom Leaves Clinicians Behind

The number of US adults with hypertension who own a home blood pressure monitor has climbed steadily over the past decade. A 2023 survey by the American Heart Association found that roughly 65 percent of hypertensive patients reported having a device at home, up from about 40 percent in 2015. Insurance coverage expanded after the Centers for Medicare & Medicaid Services (CMS) began reimbursing for home monitors under certain conditions in 2019. Retailers now sell validated cuffs for as little as US$ 30–60, and many health plans offer them at no cost to members with high blood pressure.

Yet the same survey revealed that fewer than one in five patients who own a monitor had been asked by their clinician to bring in their home readings. Even when patients voluntarily share logs, the data rarely enters the electronic health record (EHR) in a structured way. A 2024 study in the Journal of the American Board of Family Medicine reviewed records from 12 primary care clinics and found that only 6 percent of hypertensive patients had a single home blood pressure reading documented in their chart over a two-year period. The rest of the data stayed in spiral notebooks, smartphone apps, or the monitor's internal memory.

The consequences of ignoring out-of-office readings are not abstract. A meta-analysis published in The Lancet in 2022 pooled data from 38 studies and found that home blood pressure measurements were significantly stronger predictors of cardiovascular events than office readings. The hazard ratio for a 10 mm Hg rise in systolic home blood pressure was roughly 1.22, compared with 1.12 for office readings. Put simply, the numbers patients collect at home tell clinicians more about future risk than the numbers taken in the clinic—yet those numbers are routinely overlooked.

CMS has recognized the value of remote monitoring. Since 2018, it has reimbursed for remote physiologic monitoring (RPM) under CPT codes 99453 and 99454, which cover the setup and monthly transmission of patient-generated data. But uptake has been slow. As of late 2024, fewer than 5 percent of eligible Medicare beneficiaries were enrolled in RPM for hypertension, according to a CMS analysis. The reason is not a lack of devices, but a lack of clinic workflows to receive, review, and act on the data.

Why Office Readings Paint a Misleading Picture

Office blood pressure readings are notoriously unreliable. The white-coat effect—a transient rise in blood pressure due to the stress of a clinical encounter—affects an estimated 15 to 30 percent of patients. For these individuals, a reading of 150/95 in the exam room may mask a true blood pressure that is well-controlled at home. Conversely, masked hypertension—when office readings are normal but out-of-office readings are elevated—occurs in roughly 10 to 15 percent of the population. These patients are told their blood pressure is fine, yet they carry the same cardiovascular risk as those with sustained hypertension.

The gold standard for out-of-office measurement is 24-hour ambulatory blood pressure monitoring (ABPM), in which a device worn on the belt takes readings every 20 to 30 minutes during daily activities and sleep. ABPM is recommended by the US Preventive Services Task Force for confirming a hypertension diagnosis before starting treatment. Yet a 2023 survey by the American College of Cardiology found that fewer than 10 percent of US cardiologists routinely use ABPM in their practice. The reasons include cost (a single ABPM session can cost several hundred dollars), limited access to equipment, and patient discomfort.

Home blood pressure monitoring (HBPM) is a more practical alternative. Patients take two to three readings in the morning and evening over several days, then average the results. Studies consistently show that home readings correlate more closely with target organ damage—such as left ventricular hypertrophy, microalbuminuria, and carotid intima-media thickness—than office readings. A 2021 study in Hypertension compared office, home, and ambulatory readings in 1,200 patients and found that home readings predicted cardiovascular events as well as ABPM did, while office readings significantly underestimated risk in about a quarter of participants.

Despite this evidence, guideline adherence remains low. The American Heart Association and American College of Cardiology have recommended out-of-office blood pressure monitoring for diagnosis and management since their 2017 guideline. The European Society of Hypertension has endorsed HBPM even more strongly. Yet a 2024 analysis of Medicare claims found that only 12 percent of patients newly diagnosed with hypertension had any out-of-office monitoring within six months of diagnosis. The gap is not a knowledge problem—it is an implementation problem.

The Workflow Obstacle That Kills Adoption

Clinicians are not hostile to home blood pressure data. Many recognize its value. But the practical barriers to incorporating it into daily practice are formidable. The first obstacle is data format. Home monitors produce readings in a variety of ways—some print receipts, some store data in proprietary apps, some sync via Bluetooth to smartphone platforms like Apple Health or Google Fit. None of these formats talk directly to most EHRs. A nurse or medical assistant would have to manually transcribe the readings into a progress note, a time-consuming task that rarely happens in a 15-minute visit.

Even when readings are entered, EHRs typically lack structured fields for patient-generated blood pressure data. Most systems have a single vital signs section for blood pressure, which defaults to the office reading. If a clinician wants to document home readings separately, they often must add them as free text in a note—effectively hiding them from decision support tools and population health reports. A 2022 survey by the Office of the National Coordinator for Health IT found that only 8 percent of EHR vendors offered a dedicated field for home blood pressure values.

Liability concerns also play a role. Some clinicians worry that acting on patient-entered readings could expose them to legal risk if the readings are inaccurate or the patient measured incorrectly. Others fear that documenting a high home reading without immediately adjusting treatment could be seen as a deviation from the standard of care. These concerns are not unfounded, but they are also not insurmountable. The American Medical Association has issued guidance stating that home blood pressure readings are appropriate for clinical decision-making when patients are trained in proper measurement technique and devices are validated.

Reimbursement structures add another layer of complexity. CMS's RPM codes require that data be transmitted at least once every 30 days for the practice to bill. But the codes do not require that a clinician actually review the data or act on it. Some clinics have hired remote monitoring staff who collect and file the data without ever showing it to a provider. The result is a system that incentivizes data collection but not clinical action—precisely the opposite of what patients need.

A 2023 qualitative study published in the Annals of Family Medicine interviewed 45 primary care clinicians about their experiences with home blood pressure monitoring. The most common theme was a lack of time and personnel. "I have 2,000 patients with hypertension," one internist said. "If even half of them sent me weekly logs, I would need a full-time nurse just to review them. We don't have that." The study concluded that without dedicated staff or automated systems, the gap between home data collection and clinical action is unlikely to close.

Where the Evidence Already Mandates Change

Clinical guidelines have been clear for years, yet the gap between recommendation and practice in the US remains stubbornly wide. The 2017 American College of Cardiology/American Heart Association guideline on hypertension explicitly states that "out-of-office blood pressure measurements are recommended to confirm the diagnosis of hypertension and for management of blood pressure." It gives a Class I recommendation—the strongest level—for HBPM in patients with suspected white-coat or masked hypertension. A 2024 update reinforced this stance, adding that home monitoring should be used for ongoing titration of antihypertensive medications.

The SPRINT trial, published in 2015, is often cited as the landmark study that reshaped blood pressure targets. It found that intensive systolic blood pressure control (target below 120 mm Hg) reduced cardiovascular events and mortality compared with standard control (target below 140 mm Hg). But the trial used automated office blood pressure measurements—a protocol that requires the patient to rest quietly alone in a room for five minutes before a device takes multiple readings—not the casual office readings typical in routine care. Critics have argued that applying SPRINT targets to casual office readings leads to overtreatment. The trial itself underscores the importance of standardized measurement protocols, whether in or out of the office.

European guidelines have been even more emphatic. The European Society of Hypertension's 2023 guideline recommends HBPM for all patients with hypertension, both for initial diagnosis and for long-term follow-up. It specifies that home blood pressure targets should be lower than office targets—typically below 135/85 mm Hg—because home readings are generally lower. The guideline also endorses telemonitoring, in which home readings are transmitted electronically to a healthcare provider, as a way to improve blood pressure control.

A 2020 Cochrane review of 39 randomized trials found that HBPM, when combined with additional support such as phone calls or telemonitoring, reduced systolic blood pressure by an average of 3.8 mm Hg more than usual care. That may sound modest, but at a population level, a 3–4 mm Hg reduction in systolic blood pressure translates to roughly a 15–20 percent reduction in stroke and heart failure risk. The effect was even larger—about 6 mm Hg—in studies that included medication adjustment by a pharmacist or nurse based on home readings.

Yet guideline adherence in the US remains below 50 percent by most measures. A 2024 report from the National Committee for Quality Assurance found that only 45 percent of adults with hypertension had their blood pressure controlled to below 140/90 mm Hg—a less stringent target than the AHA/ACC recommendation of 130/80 mm Hg. The report noted that systems using home monitoring had significantly higher control rates, but those systems represented a small minority. The evidence is there. The will to act is not.

Clinics That Do It Right Offer a Model

Not every clinic ignores home blood pressure data. A handful of large health systems have integrated out-of-office monitoring into routine care, and their results demonstrate what is possible. Kaiser Permanente, the integrated health system serving 12 million members, has been a leader in this area. Since 2018, Kaiser has offered home blood pressure monitors to all members with uncontrolled hypertension and has built a patient portal that allows members to enter readings directly into their EHR. The system automatically flags readings above a threshold and generates alerts for care teams.

In a 2023 study published in JAMA Internal Medicine, Kaiser researchers reported that among members who used the home monitoring program, blood pressure control rates improved by 12 percentage points over one year, compared with a 4-point improvement in a matched control group. The program required no additional physician time; alerts were handled by medical assistants and pharmacists under standing orders. Kaiser's model shows that with the right infrastructure, home monitoring can be scaled without overwhelming clinicians.

The Veterans Health Administration (VA) has also pioneered home telemonitoring for hypertension. The VA's Home Telehealth program, launched in the early 2000s, provides veterans with home blood pressure cuffs that transmit readings via a telephone line or cellular connection to a centralized monitoring center. Nurses review the data and follow up with patients whose readings are out of range, often adjusting medications under protocol. A 2022 evaluation found that veterans enrolled in the program had a 25 percent lower rate of hospitalization for hypertensive crisis than those receiving usual care. The VA estimates it saves roughly US$ 2,000 per patient per year in avoided emergency department visits and hospitalizations.

Smaller pilots have also shown promise. At the University of Mississippi Medical Center, researchers tested a text-message-based intervention in which patients received reminders to take their blood pressure and upload readings via a simple phone app. Upload rates reached 70 percent within the first month, and blood pressure control improved by 8 mm Hg systolic compared with a control group. The intervention cost about US$ 15 per patient per month—far less than the cost of an uncontrolled hypertensive crisis.

Shared decision-making is a common thread in these success stories. When patients understand why home readings matter and are given a simple way to share them, engagement rises. A 2021 study in Circulation: Cardiovascular Quality and Outcomes found that patients who were taught to interpret their own home readings and given a target to aim for were more likely to adhere to medication and lifestyle changes. The study's lead author, Dr. Karen Margolis, noted that "patients want to be partners in their care, but they need tools and feedback, not just a device."

Three Fixes That Don't Require New Technology

While some solutions require investment in EHR upgrades or telemonitoring platforms, several effective fixes are low-tech and can be implemented in any clinic. The first is to standardize the home blood pressure log format. Most patients are given a generic paper log with no guidance on how many readings to take or how to average them. A simple one-page form that instructs patients to take two readings in the morning and two in the evening for seven days, and to bring the average to their next visit, could dramatically improve data quality. The American Heart Association offers a free printable log online, but few clinics distribute it.

The second fix is to train medical assistants to verify and enter home readings at the start of every visit. In many clinics, medical assistants already room patients, take vital signs, and update medication lists. Adding a step—"Do you have your home blood pressure log?"—takes less than a minute. If the patient has it, the assistant can enter the average into a designated field in the EHR. If the patient does not, the assistant can hand them a new log and remind them to bring it next time. This simple workflow change, adopted by a handful of clinics in the Midwest, has been shown to increase documentation of home readings from near zero to about 40 percent within three months.

The third fix is to create a nurse-led phone follow-up protocol for patients with abnormal home trends. Instead of waiting for the next office visit—which may be months away—clinics can have a nurse call patients whose home readings are consistently above target and adjust medications under a standing order. This model is used by the VA and by several accountable care organizations. A 2023 study in Health Affairs found that nurse-led phone follow-up reduced time to blood pressure control from an average of 12 weeks to 5 weeks, with no increase in adverse events. The key is to use existing CPT codes for remote physiologic monitoring to cover the nurse's time.

None of these fixes require new technology. They require a shift in clinic culture—a recognition that home blood pressure data is not a nice-to-have, but a clinical necessity. As Dr. Margolis put it, "We have the evidence. We have the devices. What we need now is the will to change how we work."

Looking ahead, the path to closing the home-monitoring gap will require a combination of policy changes, payment reform, and grassroots clinic innovation. Professional societies could do more to embed home monitoring into quality metrics and board certification standards. Insurers could tie reimbursement to the review and use of home data, not just its collection. And medical schools could expand training on out-of-office measurement and shared decision-making. For now, the burden falls on individual clinics to redesign their workflows—and on patients like Michele Torres to keep bringing their logs, hoping someone will look. But the evidence is clear: the system must change, and the tools to do so are already in hand.

This article was prepared by a journalist and is intended for informational purposes. It does not replace professional medical advice. Readers should consult their healthcare provider for any health-related decisions.